Makefile

@@ -4,7 +4,7 @@ all:
 	clear; cargo build
 
 release:
-	nix-build --arg release true
+	nix-build --attr pkgs.amd64.release --no-build-output
 
 shell:
 	nix-shell

default.nix

@@ -1,7 +1,4 @@
-{
-  system ? builtins.currentSystem,
-  git_version ? null,
-}:
+{ system ? builtins.currentSystem, git_version ? null, }:
 
 with import ./nix/common.nix;
 
@@ -13,22 +10,21 @@ let
     debug = (compile {
       inherit system target git_version pkgsSrc cargo2nixOverlay;
       release = false;
-    }).workspace.garage {
-      compileMode = "build";
-    };
+    }).workspace.garage { compileMode = "build"; };
 
     release = (compile {
       inherit system target git_version pkgsSrc cargo2nixOverlay;
       release = true;
-    }).workspace.garage {
-      compileMode = "build";
-    };
+    }).workspace.garage { compileMode = "build"; };
   });
 
-  test = (rustPkgs: pkgs.symlinkJoin {
-    name ="garage-tests";
-    paths = builtins.map (key: rustPkgs.workspace.${key} { compileMode = "test"; }) (builtins.attrNames rustPkgs.workspace);
-  });
+  test = (rustPkgs:
+    pkgs.symlinkJoin {
+      name = "garage-tests";
+      paths =
+        builtins.map (key: rustPkgs.workspace.${key} { compileMode = "test"; })
+        (builtins.attrNames rustPkgs.workspace);
+    });
 
 in {
   pkgs = {
@@ -55,8 +51,6 @@ in {
       inherit system git_version pkgsSrc cargo2nixOverlay;
       target = "x86_64-unknown-linux-musl";
       compiler = "clippy";
-    }).workspace.garage {
-      compileMode = "build";
-    };
+    }).workspace.garage { compileMode = "build"; };
   };
 }

doc/api/garage-admin-v0.yml

@@ -678,10 +678,12 @@ paths:
                   properties:
                     maxSize: 
                       type: integer
+                      format: int64
                       nullable: true
                       example: 19029801
                     maxObjects:
                       type: integer
+                      format: int64
                       nullable: true
                       example: null
 
@@ -1158,9 +1160,11 @@ components:
             $ref: '#/components/schemas/BucketKeyInfo'
         objects:
           type: integer
+          format: int64
           example: 14827
         bytes:
           type: integer
+          format: int64
           example: 13189855625
         unfinishedUploads:
           type: integer
@@ -1171,10 +1175,12 @@ components:
             maxSize:
               nullable: true
               type: integer
+              format: int64
               example: null
             maxObjects:
               nullable: true
               type: integer
+              format: int64
               example: null
 
 

doc/book/connect/_index.md

@@ -10,11 +10,12 @@ Garage implements the Amazon S3 protocol, which makes it compatible with many ex
 
 In particular, you will find here instructions to connect it with:
 
-  - [Browsing tools](@/documentation/connect/cli.md)
   - [Applications](@/documentation/connect/apps/index.md)
-  - [Website hosting](@/documentation/connect/websites.md)
-  - [Software repositories](@/documentation/connect/repositories.md)
+  - [Browsing tools](@/documentation/connect/cli.md)
   - [FUSE](@/documentation/connect/fs.md)
+  - [Observability](@/documentation/connect/observability.md)
+  - [Software repositories](@/documentation/connect/repositories.md)
+  - [Website hosting](@/documentation/connect/websites.md)
 
 ### Generic instructions
 

doc/book/connect/apps/index.md

@@ -13,7 +13,7 @@ In this section, we cover the following web applications:
 | [Matrix](#matrix)     | ✅       |  Tested with `synapse-s3-storage-provider`    |
 | [Pixelfed](#pixelfed)     | ❓       |  Not yet tested    |
 | [Pleroma](#pleroma)     | ❓       |  Not yet tested    |
-| [Lemmy](#lemmy)     | ❓       |  Not yet tested    |
+| [Lemmy](#lemmy)     | ✅        |  Supported with pict-rs    |
 | [Funkwhale](#funkwhale)     | ❓       | Not yet tested     |
 | [Misskey](#misskey)     | ❓       | Not yet tested     |
 | [Prismo](#prismo)     | ❓       | Not yet tested     |
@@ -484,7 +484,68 @@ And add a new line. For example, to run it every 10 minutes:
 
 ## Lemmy
 
-Lemmy uses pict-rs that [supports S3 backends](https://git.asonix.dog/asonix/pict-rs/commit/f9f4fc63d670f357c93f24147c2ee3e1278e2d97)
+Lemmy uses pict-rs that [supports S3 backends](https://git.asonix.dog/asonix/pict-rs/commit/f9f4fc63d670f357c93f24147c2ee3e1278e2d97).
+This feature requires `pict-rs >= 4.0.0`.
+
+### Creating your bucket
+
+This is the usual Garage setup:
+
+```bash
+garage key new --name pictrs-key
+garage bucket create pictrs-data
+garage bucket allow pictrs-data --read --write --key pictrs-key
+```
+
+Note the Key ID and Secret Key.
+
+### Migrating your data
+
+If your pict-rs instance holds existing data, you first need to migrate to the S3 bucket.
+
+Stop pict-rs, then run the migration utility from local filesystem to the bucket:
+
+```
+pict-rs \
+  filesystem -p /path/to/existing/files \
+  object-store \
+   -e my-garage-instance.mydomain.tld:3900 \
+   -b pictrs-data \
+   -r garage \
+   -a GK... \
+   -s abcdef0123456789...
+```
+
+This is pretty slow, so hold on while migrating.
+
+### Running pict-rs with an S3 backend
+
+Pict-rs supports both a configuration file and environment variables.
+
+Either set the following section in your `pict-rs.toml`:
+
+```
+[store]
+type = 'object_storage'
+endpoint = 'http://my-garage-instance.mydomain.tld:3900'
+bucket_name = 'pictrs-data'
+region = 'garage'
+access_key = 'GK...'
+secret_key = 'abcdef0123456789...'
+```
+
+... or set these environment variables:
+
+
+```
+PICTRS__STORE__TYPE=object_storage
+PICTRS__STORE__ENDPOINT=http:/my-garage-instance.mydomain.tld:3900
+PICTRS__STORE__BUCKET_NAME=pictrs-data
+PICTRS__STORE__REGION=garage
+PICTRS__STORE__ACCESS_KEY=GK...
+PICTRS__STORE__SECRET_KEY=abcdef0123456789...
+```
+
 
 ## Funkwhale
 

doc/book/connect/observability.md

@@ -0,0 +1,57 @@
++++
+title = "Observability"
+weight = 25
++++
+
+An object store can be used as data storage location for metrics, and logs which
+can then be leveraged for systems observability.
+
+## Metrics
+
+### Prometheus
+
+Prometheus itself has no object store capabilities, however two projects exist
+which support storing metrics in an object store:
+
+ - [Cortex](https://cortexmetrics.io/)
+ - [Thanos](https://thanos.io/)
+
+## System logs
+
+### Vector
+
+[Vector](https://vector.dev/) natively supports S3 as a
+[data sink](https://vector.dev/docs/reference/configuration/sinks/aws_s3/)
+(and [source](https://vector.dev/docs/reference/configuration/sources/aws_s3/)).
+
+This can be configured with Garage with the following:
+
+```bash
+garage key new --name vector-system-logs
+garage bucket create system-logs
+garage bucket allow system-logs --read --write --key vector-system-logs
+```
+
+The `vector.toml` can then be configured as follows:
+
+```toml
+[sources.journald]
+type = "journald"
+current_boot_only = true
+
+[sinks.out]
+encoding.codec = "json"
+type = "aws_s3"
+inputs = [ "journald" ]
+bucket = "system-logs"
+key_prefix = "%F/"
+compression = "none"
+region = "garage"
+endpoint = "https://my-garage-instance.mydomain.tld"
+auth.access_key_id = ""
+auth.secret_access_key = ""
+```
+
+This is an example configuration - please refer to the Vector documentation for
+all configuration and transformation possibilities. Also note that Garage
+performs its own compression, so this should be disabled in Vector.

doc/book/cookbook/real-world.md

@@ -19,8 +19,12 @@ To run a real-world deployment, make sure the following conditions are met:
 
 - You have at least three machines with sufficient storage space available.
 
-- Each machine has a public IP address which is reachable by other machines.
-  Running behind a NAT is likely to be possible but hasn't been tested for the latest version (TODO).
+- Each machine has a public IP address which is reachable by other machines. It
+  is highly recommended that you use IPv6 for this end-to-end connectivity. If
+  IPv6 is not available, then using a mesh VPN such as
+  [Nebula](https://github.com/slackhq/nebula) or
+  [Yggdrasil](https://yggdrasil-network.github.io/) are approaches to consider
+  in addition to building out your own VPN tunneling.
 
 - This guide will assume you are using Docker containers to deploy Garage on each node. 
   Garage can also be run independently, for instance as a [Systemd service](@/documentation/cookbook/systemd.md).

doc/talks/.envrc

@@ -0,0 +1 @@
+use_nix

doc/talks/2023-01-18-tocatta/.gitignore

@@ -0,0 +1,17 @@
+*
+
+!*.txt
+!*.md
+
+!assets
+
+!.gitignore
+!*.svg
+!*.png
+!*.jpg
+!*.tex
+!Makefile
+!.gitignore
+!assets/*.drawio.pdf
+
+!talk.pdf

doc/talks/2023-01-18-tocatta/Makefile

@@ -0,0 +1,34 @@
+ASSETS=assets/consistent_hashing_1.pdf \
+	   assets/consistent_hashing_2.pdf \
+	   assets/consistent_hashing_3.pdf \
+	   assets/consistent_hashing_4.pdf \
+	   assets/garage_tables.pdf \
+	   assets/consensus.pdf_tex \
+	   assets/lattice1.pdf_tex \
+	   assets/lattice2.pdf_tex \
+	   assets/lattice3.pdf_tex \
+	   assets/lattice4.pdf_tex \
+	   assets/lattice5.pdf_tex \
+	   assets/lattice6.pdf_tex \
+	   assets/lattice7.pdf_tex \
+	   assets/lattice8.pdf_tex \
+	   assets/latticeB_1.pdf_tex \
+	   assets/latticeB_2.pdf_tex \
+	   assets/latticeB_3.pdf_tex \
+	   assets/latticeB_4.pdf_tex \
+	   assets/latticeB_5.pdf_tex \
+	   assets/latticeB_6.pdf_tex \
+	   assets/latticeB_7.pdf_tex \
+	   assets/latticeB_8.pdf_tex \
+	   assets/latticeB_9.pdf_tex \
+	   assets/latticeB_10.pdf_tex \
+	   assets/deuxfleurs.pdf
+
+talk.pdf: talk.tex $(ASSETS)
+	pdflatex talk.tex
+
+assets/%.pdf: assets/%.svg
+	inkscape -D -z --file=$^ --export-pdf=$@
+
+assets/%.pdf_tex: assets/%.svg
+	inkscape -D -z --file=$^ --export-pdf=$@ --export-latex

doc/talks/2023-01-18-tocatta/abstract.md

@@ -0,0 +1,39 @@
+### (fr) Garage, un système de stockage de données géo-distribué léger et robuste
+
+Garage est un système de stockage de données léger, géo-distribué, qui
+implémente le protocole de stockage S3 de Amazon. Garage est destiné
+principalement à l'auto-hébergement sur du matériel courant d'occasion. À ce
+titre, il doit tolérer un grand nombre de pannes: coupures de courant, coupures
+de connexion Internet, pannes de machines, ... Il doit également être facile à
+déployer et à maintenir, afin de pouvoir être facilement utilisé par des
+amateurs ou des petites organisations.
+
+Cette présentation vous proposera un aperçu de Garage et du choix technique
+principal qui rend un système comme Garage possible: le refus d'utiliser des
+algorithmes de consensus, remplacés avantageusement par des méthodes à
+cohérence faible.  Notre modèle est fortement inspiré de la base de donnée
+Dynamo (DeCandia et al, 2007), et fait usage des types de données CRDT (Shapiro
+et al, 2011).  Nous exploreront comment ces méthodes s'appliquent à la
+construction de l'abstraction "stockage objet" dans un système distribué, et
+quelles autres abstractions peuvent ou ne peuvent pas être construites dans ce
+modèle.
+
+### (en) Garage, a lightweight and robust geo-distributed data storage system
+
+Garage is a lightweight geo-distributed data store that implements the Amazon
+S3 object storage protocol.  Garage is meant primarily for self-hosting at home
+on second-hand commodity hardware, meaning it has to tolerate a wide variety of
+failure scenarios such as power cuts, Internet disconnections and machine
+crashes. It also has to be easy to deploy and maintain, so that hobbyists and
+small organizations can use it without trouble. 
+
+This talk will present Garage and the key technical choice that made Garage
+possible: refusing to use consensus algorithms and using instead weak
+consistency methods, with a model that is loosely based on that of the Dynamo
+database (DeCandia et al, 2007) and that makes heavy use of conflict-free
+replicated data types (Shapiro et al, 2011).  We will explore how these methods
+are suited to building the "object store" abstraction in a distributed system,
+and what other abstractions are possible or impossible to build in this model.
+
+
+

doc/talks/2023-01-18-tocatta/assets/consensus.svg

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+    <text
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+    <text
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+         id="tspan4278"
+         style="fill:#000000;stroke-width:0.264583"
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+  </g>
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+         id="tspan4278"
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+    <circle
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+       cx="18.004833"
+       cy="21.341394"
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+       id="text3707"><tspan
+         sodipodi:role="line"
+         id="tspan3705"
+         style="stroke-width:0.264583;fill:#000000"
+         x="6.9525447"
+         y="13.702217">$write(\{a\})$:</tspan></text>
+    <text
+       xml:space="preserve"
+       style="font-size:8.46667px;line-height:1.25;font-family:sans-serif;fill:#000000;stroke-width:0.264583"
+       x="6.9525447"
+       y="65.261436"
+       id="text3707-1"><tspan
+         sodipodi:role="line"
+         id="tspan3705-5"
+         style="fill:#000000;stroke-width:0.264583"
+         x="6.9525447"
+         y="65.261436">$read()$:</tspan></text>
+    <text
+       xml:space="preserve"
+       style="font-size:8.46667px;line-height:1.25;font-family:sans-serif;fill:#000000;stroke-width:0.264583"
+       x="23.457415"
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+       id="text3750"><tspan
+         sodipodi:role="line"
+         id="tspan3748"
+         style="fill:#000000;stroke-width:0.264583"
+         x="23.457415"
+         y="24.042637">$\sqsupseteq \{a\} \to$ OK</tspan></text>
+    <text
+       xml:space="preserve"
+       style="font-size:8.46667px;line-height:1.25;font-family:sans-serif;fill:#000000;stroke-width:0.264583"
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+       id="text3750-3"><tspan
+         sodipodi:role="line"
+         id="tspan3748-2"
+         style="fill:#000000;stroke-width:0.264583"
+         x="23.457415"
+         y="33.02087">$\sqsupseteq \{a\} \to$ OK</tspan></text>
+    <text
+       xml:space="preserve"
+       style="font-size:8.46667px;line-height:1.25;font-family:sans-serif;fill:#999999;stroke-width:0.264583"
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+         id="tspan3748-6"
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+         x="23.457415"
+         y="41.972523">$\not\sqsupseteq \{a\}$</tspan></text>
+    <circle
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+       id="path3663-6-6-4"
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+       cy="70.942116"
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+    <text
+       xml:space="preserve"
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+       id="text3750-7"><tspan
+         sodipodi:role="line"
+         id="tspan3748-65"
+         style="fill:#000000;stroke-width:0.264583"
+         x="23.457415"
+         y="73.643356">$\to \{\}$</tspan></text>
+    <text
+       xml:space="preserve"
+       style="font-size:8.46667px;line-height:1.25;font-family:sans-serif;fill:#000000;stroke-width:0.264583"
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+       id="text4280"><tspan
+         sodipodi:role="line"
+         id="tspan4278"
+         style="fill:#000000;stroke-width:0.264583"
+         x="14.395845"
+         y="52.022549">return OK</tspan></text>
+  </g>
+</svg>

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+    </g>
+    <g
+       id="g1183"
+       transform="translate(51.996784,1.0317046)"
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+      <text
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+      <text
+         xml:space="preserve"
+         style="font-size:8.46667px;line-height:1.25;font-family:sans-serif;text-align:center;text-anchor:middle;stroke-width:0.264583;fill:#000000"
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+           id="tspan1115-5"
+           style="stroke-width:0.264583;fill:#000000"
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+           y="40.841526">$\{a,b\}$</tspan></text>
+      <text
+         xml:space="preserve"
+         style="font-size:8.46667px;line-height:1.25;font-family:sans-serif;text-align:center;text-anchor:middle;stroke-width:0.264583;fill:#000000"
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+           id="tspan1115-2"
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+    <path
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+    <path
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+       id="path1300-2-2-6-9"
+       sodipodi:nodetypes="cc" />
+    <circle
+       style="fill:#ff0000;stroke:none;stroke-width:0.499999;stroke-dasharray:none;stop-color:#000000"
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+    <circle
+       style="fill:#ff0000;stroke:none;stroke-width:0.499999;stroke-dasharray:none;stop-color:#000000"
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+    <circle
+       style="fill:#008000;stroke:none;stroke-width:0.499999;stroke-dasharray:none;stop-color:#000000"
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+    <circle
+       style="fill:#800080;stroke:none;stroke-width:0.499999;stroke-dasharray:none;stop-color:#000000"
+       id="path3663-6-6"
+       cx="18.004833"
+       cy="21.341394"
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+    <text
+       xml:space="preserve"
+       style="font-size:8.46667px;line-height:1.25;font-family:sans-serif;stroke-width:0.264583;fill:#000000"
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+       y="13.702217"
+       id="text3707"><tspan
+         sodipodi:role="line"
+         id="tspan3705"
+         style="stroke-width:0.264583;fill:#000000"
+         x="6.9525447"
+         y="13.702217">$write(\{a\})$:</tspan></text>
+    <text
+       xml:space="preserve"
+       style="font-size:8.46667px;line-height:1.25;font-family:sans-serif;fill:#000000;stroke-width:0.264583"
+       x="6.9525447"
+       y="65.261436"
+       id="text3707-1"><tspan
+         sodipodi:role="line"
+         id="tspan3705-5"
+         style="fill:#000000;stroke-width:0.264583"
+         x="6.9525447"
+         y="65.261436">$read()$:</tspan></text>
+    <text
+       xml:space="preserve"
+       style="font-size:8.46667px;line-height:1.25;font-family:sans-serif;fill:#000000;stroke-width:0.264583"
+       x="23.457415"
+       y="24.042637"
+       id="text3750"><tspan
+         sodipodi:role="line"
+         id="tspan3748"
+         style="fill:#000000;stroke-width:0.264583"
+         x="23.457415"
+         y="24.042637">$\sqsupseteq \{a\} \to$ OK</tspan></text>
+    <text
+       xml:space="preserve"
+       style="font-size:8.46667px;line-height:1.25;font-family:sans-serif;fill:#000000;stroke-width:0.264583"
+       x="23.457415"
+       y="33.02087"
+       id="text3750-3"><tspan
+         sodipodi:role="line"
+         id="tspan3748-2"
+         style="fill:#000000;stroke-width:0.264583"
+         x="23.457415"
+         y="33.02087">$\sqsupseteq \{a\} \to$ OK</tspan></text>
+    <text
+       xml:space="preserve"
+       style="font-size:8.46667px;line-height:1.25;font-family:sans-serif;fill:#999999;stroke-width:0.264583"
+       x="23.457415"
+       y="41.972523"
+       id="text3750-0"><tspan
+         sodipodi:role="line"
+         id="tspan3748-6"
+         style="fill:#999999;stroke-width:0.264583"
+         x="23.457415"
+         y="41.972523">$\not\sqsupseteq \{a\}$</tspan></text>
+    <circle
+       style="fill:#ff0000;stroke:none;stroke-width:0.499999;stroke-dasharray:none;stop-color:#000000"
+       id="path3663-6-6-4"
+       cx="18.004833"
+       cy="70.942116"
+       r="2.7302806" />
+    <text
+       xml:space="preserve"
+       style="font-size:8.46667px;line-height:1.25;font-family:sans-serif;fill:#000000;stroke-width:0.264583"
+       x="23.457415"
+       y="73.643356"
+       id="text3750-7"><tspan
+         sodipodi:role="line"
+         id="tspan3748-65"
+         style="fill:#000000;stroke-width:0.264583"
+         x="23.457415"
+         y="73.643356">$\to \{\}$</tspan></text>
+    <text
+       xml:space="preserve"
+       style="font-size:8.46667px;line-height:1.25;font-family:sans-serif;fill:#000000;stroke-width:0.264583"
+       x="14.395845"
+       y="52.022549"
+       id="text4280"><tspan
+         sodipodi:role="line"
+         id="tspan4278"
+         style="fill:#000000;stroke-width:0.264583"
+         x="14.395845"
+         y="52.022549">return OK</tspan></text>
+    <text
+       xml:space="preserve"
+       style="font-size:8.46667px;line-height:1.25;font-family:sans-serif;fill:#000000;stroke-width:0.264583"
+       x="14.395845"
+       y="92.005798"
+       id="text4280-3"><tspan
+         sodipodi:role="line"
+         id="tspan4278-7"
+         style="fill:#000000;stroke-width:0.264583"
+         x="14.395845"
+         y="92.005798">return $\{\}\sqcup\{a\}=\{a\}$</tspan></text>
+    <circle
+       style="fill:#800080;stroke:none;stroke-width:0.499999;stroke-dasharray:none;stop-color:#000000"
+       id="path3663-1-5"
+       cx="18.004833"
+       cy="81.007744"
+       r="2.7302806" />
+    <text
+       xml:space="preserve"
+       style="font-size:8.46667px;line-height:1.25;font-family:sans-serif;fill:#000000;stroke-width:0.264583"
+       x="23.457415"
+       y="83.577797"
+       id="text3750-0-6"><tspan
+         sodipodi:role="line"
+         id="tspan3748-6-9"
+         style="fill:#000000;stroke-width:0.264583"
+         x="23.457415"
+         y="83.577797">$\to \{a\}$</tspan></text>
+  </g>
+</svg>

doc/talks/2023-01-18-tocatta/assets/lattice8.svg

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+    <text
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+         id="tspan3748-65"
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+    <text
+       xml:space="preserve"
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+         id="tspan4278-7"
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+       style="font-size:8.46667px;line-height:1.25;font-family:sans-serif;fill:#999999;stroke-width:0.264583"
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+       y="93.54969"
+       id="text3750-0-0"><tspan
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+         id="tspan3748-6-7"
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+         x="23.457415"
+         y="93.54969">$\not\sqsupseteq \{b\}$</tspan></text>
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+         id="tspan3748-3"
+         style="fill:#000000;stroke-width:0.264583"
+         x="72.653946"
+         y="127.6125">$\to \{a\}$</tspan></text>
+    <text
+       xml:space="preserve"
+       style="font-size:8.46667px;line-height:1.25;font-family:sans-serif;fill:#000000;stroke-width:0.264583"
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+         style="fill:#000000;stroke-width:0.264583"
+         x="62.764446"
+         y="146.3129"
+         id="tspan2630">return $\{a\}$</tspan></text>
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+       id="path3663-3-0-7"
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+         sodipodi:role="line"
+         id="tspan3748-2-0"
+         style="fill:#000000;stroke-width:0.264583"
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+    <text
+       xml:space="preserve"
+       style="font-size:8.46667px;line-height:1.25;font-family:sans-serif;fill:#000000;stroke-width:0.264583"
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+         id="tspan3748-3-8"
+         style="fill:#000000;stroke-width:0.264583"
+         x="179.81555"
+         y="127.6125">$\to \{\}$</tspan></text>
+    <text
+       xml:space="preserve"
+       style="font-size:8.46667px;line-height:1.25;font-family:sans-serif;fill:#000000;stroke-width:0.264583"
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+       y="118.94403"
+       id="text3707-5-3-7"><tspan
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+         id="tspan3705-4-6-5"
+         style="fill:#000000;stroke-width:0.264583"
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+    <text
+       xml:space="preserve"
+       style="font-size:8.46667px;line-height:1.25;font-family:sans-serif;stroke-width:0.264583"
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+       y="132.58472"
+       id="text3899"><tspan
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+         x="134.97845"
+         y="132.58472">;</tspan></text>
+    <text
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+       style="font-size:8.46667px;line-height:1.25;font-family:sans-serif;fill:#000000;stroke-width:0.264583"
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+       id="text4280-6-7"><tspan
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+         x="169.92604"
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+         id="tspan2630-9">return $\{b\}$</tspan></text>
+    <circle
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+       id="path3663-3-0-7-2"
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+    <text
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+       id="text3750-3-6-0"><tspan
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+         id="tspan3748-2-0-2"
+         style="fill:#000000;stroke-width:0.264583"
+         x="179.81555"
+         y="136.59073">$\to \{b\}$</tspan></text>
+    <text
+       xml:space="preserve"
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+       id="text9043"><tspan
+         sodipodi:role="line"
+         id="tspan9041"
+         style="fill:#ff0000;stroke-width:0.264583"
+         x="259.75"
+         y="135.53111">${\Large\textbf{??!}}$~~~~~</tspan><tspan
+         sodipodi:role="line"
+         style="fill:#ff0000;stroke-width:0.264583"
+         x="259.75"
+         y="146.11446"
+         id="tspan9372">$\{a\} \not\sqsubseteq \{b\}$</tspan></text>
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+         x="23.457415"
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+         style="fill:#000000;stroke-width:0.264583"
+         x="23.457415"
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+    <text
+       xml:space="preserve"
+       style="font-size:8.46667px;line-height:1.25;font-family:sans-serif;fill:#999999;stroke-width:0.264583"
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+    <text
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+         id="tspan3748-3"
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+         x="72.653946"
+         y="127.6125">$\to \{a\}$</tspan></text>
+    <text
+       xml:space="preserve"
+       style="font-size:8.46667px;line-height:1.25;font-family:sans-serif;fill:#000000;stroke-width:0.264583"
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+         id="tspan3748-2-0"
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+    <path
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+    <path
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+       style="fill:#ff0000;stroke:none;stroke-width:0.499999;stroke-dasharray:none;stop-color:#000000"
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+       cx="147.35568"
+       cy="95.24971"
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+    <circle
+       style="fill:#008000;stroke:none;stroke-width:0.499999;stroke-dasharray:none;stop-color:#000000"
+       id="path3663-3"
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+    <circle
+       style="fill:#ff0000;stroke:none;stroke-width:0.499999;stroke-dasharray:none;stop-color:#000000"
+       id="path3663-1"
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+    <circle
+       style="fill:#008000;stroke:none;stroke-width:0.499999;stroke-dasharray:none;stop-color:#000000"
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+       cy="30.371933"
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+    <circle
+       style="fill:#800080;stroke:none;stroke-width:0.499999;stroke-dasharray:none;stop-color:#000000"
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+       cx="18.004833"
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+    <text
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+       style="font-size:8.46667px;line-height:1.25;font-family:sans-serif;fill:#000000;stroke-width:0.264583"
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+         sodipodi:role="line"
+         id="tspan3705"
+         style="fill:#000000;stroke-width:0.264583"
+         x="6.9525447"
+         y="13.702217">$write(\{a\})$:</tspan></text>
+    <text
+       xml:space="preserve"
+       style="font-size:8.46667px;line-height:1.25;font-family:sans-serif;fill:#000000;stroke-width:0.264583"
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+       id="text3750"><tspan
+         sodipodi:role="line"
+         id="tspan3748"
+         style="fill:#000000;stroke-width:0.264583"
+         x="23.457415"
+         y="24.042637">$\sqsupseteq \{a\} \to$ OK</tspan></text>
+    <text
+       xml:space="preserve"
+       style="font-size:8.46667px;line-height:1.25;font-family:sans-serif;fill:#999999;stroke-width:0.264583"
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+       id="text3750-3"><tspan
+         sodipodi:role="line"
+         id="tspan3748-2"
+         style="fill:#999999;stroke-width:0.264583"
+         x="23.457415"
+         y="33.02087">$\not\sqsupseteq \{a\}$</tspan></text>
+    <text
+       xml:space="preserve"
+       style="font-size:8.46667px;line-height:1.25;font-family:sans-serif;fill:#999999;stroke-width:0.264583"
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+       y="41.972523"
+       id="text3750-0"><tspan
+         sodipodi:role="line"
+         id="tspan3748-6"
+         style="fill:#999999;stroke-width:0.264583"
+         x="23.457415"
+         y="41.972523">$\not\sqsupseteq \{a\}$</tspan></text>
+    <circle
+       style="fill:#ff0000;stroke:none;stroke-width:0.499999;stroke-dasharray:none;stop-color:#000000"
+       id="path3663-1-4"
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+    <circle
+       style="fill:#008000;stroke:none;stroke-width:0.499999;stroke-dasharray:none;stop-color:#000000"
+       id="path3663-3-0-5"
+       cx="18.004833"
+       cy="81.949104"
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+    <circle
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+    <text
+       xml:space="preserve"
+       style="font-size:8.46667px;line-height:1.25;font-family:sans-serif;fill:#000000;stroke-width:0.264583"
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+       id="text3707-5"><tspan
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+         id="tspan3705-4"
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+    <text
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+       id="text3707-5-3"><tspan
+         sodipodi:role="line"
+         id="tspan3705-4-6"
+         style="fill:#000000;stroke-width:0.264583"
+         x="59.340172"
+         y="118.94403">$read()$:</tspan></text>
+    <text
+       xml:space="preserve"
+       style="font-size:8.46667px;line-height:1.25;font-family:sans-serif;fill:#999999;stroke-width:0.264583"
+       x="23.457415"
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+       id="text3750-7"><tspan
+         sodipodi:role="line"
+         id="tspan3748-4"
+         style="fill:#999999;stroke-width:0.264583"
+         x="23.457415"
+         y="75.619804">$\not\sqsupseteq \{b\}$</tspan></text>
+    <text
+       xml:space="preserve"
+       style="font-size:8.46667px;line-height:1.25;font-family:sans-serif;fill:#000000;stroke-width:0.264583"
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+       y="84.598038"
+       id="text3750-3-4"><tspan
+         sodipodi:role="line"
+         id="tspan3748-2-3"
+         style="fill:#000000;stroke-width:0.264583"
+         x="23.457415"
+         y="84.598038">$\sqsupseteq \{b\} \to$ OK</tspan></text>
+    <text
+       xml:space="preserve"
+       style="font-size:8.46667px;line-height:1.25;font-family:sans-serif;fill:#999999;stroke-width:0.264583"
+       x="23.457415"
+       y="93.54969"
+       id="text3750-0-0"><tspan
+         sodipodi:role="line"
+         id="tspan3748-6-7"
+         style="fill:#999999;stroke-width:0.264583"
+         x="23.457415"
+         y="93.54969">$\not\sqsupseteq \{b\}$</tspan></text>
+    <circle
+       style="fill:#800080;stroke:none;stroke-width:0.499999;stroke-dasharray:none;stop-color:#000000"
+       id="path3663-6"
+       cx="118.63729"
+       cy="67.630196"
+       r="2.7302806" />
+    <circle
+       style="fill:#800080;stroke:none;stroke-width:0.499999;stroke-dasharray:none;stop-color:#000000"
+       id="path3663-6-6-0"
+       cx="67.201363"
+       cy="124.91125"
+       r="2.7302806" />
+    <text
+       xml:space="preserve"
+       style="font-size:8.46667px;line-height:1.25;font-family:sans-serif;fill:#000000;stroke-width:0.264583"
+       x="72.653946"
+       y="127.6125"
+       id="text3750-9"><tspan
+         sodipodi:role="line"
+         id="tspan3748-3"
+         style="fill:#000000;stroke-width:0.264583"
+         x="72.653946"
+         y="127.6125">$\to \{a\}$</tspan></text>
+    <text
+       xml:space="preserve"
+       style="font-size:8.46667px;line-height:1.25;font-family:sans-serif;fill:#000000;stroke-width:0.264583"
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+       id="text4280-6"><tspan
+         sodipodi:role="line"
+         style="fill:#000000;stroke-width:0.264583"
+         x="62.764446"
+         y="146.3129"
+         id="tspan2630">return $\{a\}$</tspan></text>
+    <circle
+       style="fill:#ff0000;stroke:none;stroke-width:0.499999;stroke-dasharray:none;stop-color:#000000"
+       id="path3663-3-0-7"
+       cx="67.201363"
+       cy="133.94179"
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+    <text
+       xml:space="preserve"
+       style="font-size:8.46667px;line-height:1.25;font-family:sans-serif;fill:#000000;stroke-width:0.264583"
+       x="72.653946"
+       y="136.59073"
+       id="text3750-3-6"><tspan
+         sodipodi:role="line"
+         id="tspan3748-2-0"
+         style="fill:#000000;stroke-width:0.264583"
+         x="72.653946"
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+    <circle
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+       id="path3663-6-6-0-6"
+       cx="174.36296"
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+    <text
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+       style="font-size:8.46667px;line-height:1.25;font-family:sans-serif;fill:#000000;stroke-width:0.264583"
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+       id="text3750-9-1"><tspan
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+         id="tspan3748-3-8"
+         style="fill:#000000;stroke-width:0.264583"
+         x="179.81555"
+         y="127.6125">$\to \{\}$</tspan></text>
+    <text
+       xml:space="preserve"
+       style="font-size:8.46667px;line-height:1.25;font-family:sans-serif;fill:#000000;stroke-width:0.264583"
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+       id="text3707-5-3-7"><tspan
+         sodipodi:role="line"
+         id="tspan3705-4-6-5"
+         style="fill:#000000;stroke-width:0.264583"
+         x="162.7999"
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+    <text
+       xml:space="preserve"
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+       id="text3899"><tspan
+         sodipodi:role="line"
+         id="tspan3897"
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doc/talks/2023-01-18-tocatta/talk.tex

@@ -0,0 +1,935 @@
+%\nonstopmode
+\documentclass[aspectratio=169]{beamer}
+\usepackage[utf8]{inputenc}
+% \usepackage[frenchb]{babel}
+\usepackage{amsmath}
+\usepackage{mathtools}
+\usepackage{breqn}
+\usepackage{multirow}
+\usetheme{boxes}
+\usepackage{graphicx}
+\usepackage{import}
+\usepackage{adjustbox}
+%\useoutertheme[footline=authortitle,subsection=false]{miniframes}
+%\useoutertheme[footline=authorinstitute,subsection=false]{miniframes}
+\useoutertheme{infolines}
+\setbeamertemplate{headline}{}
+
+\beamertemplatenavigationsymbolsempty
+
+\definecolor{TitleOrange}{RGB}{255,137,0}
+\setbeamercolor{title}{fg=TitleOrange}
+\setbeamercolor{frametitle}{fg=TitleOrange}
+
+\definecolor{ListOrange}{RGB}{255,145,5}
+\setbeamertemplate{itemize item}{\color{ListOrange}$\blacktriangleright$}
+
+\definecolor{verygrey}{RGB}{70,70,70}
+\setbeamercolor{normal text}{fg=verygrey}
+
+
+\usepackage{tabu}
+\usepackage{multicol}
+\usepackage{vwcol}
+\usepackage{stmaryrd}
+\usepackage{graphicx}
+
+\usepackage[normalem]{ulem}
+
+\AtBeginSection[]{
+  \begin{frame}
+  \vfill
+  \centering
+  \begin{beamercolorbox}[sep=8pt,center,shadow=true,rounded=true]{title}
+    \usebeamerfont{title}\insertsectionhead\par%
+  \end{beamercolorbox}
+  \vfill
+  \end{frame}
+}
+
+\title{Garage}
+\subtitle{a lightweight and robust geo-distributed data storage system}
+\author{Alex Auvolat, Deuxfleurs Association}
+\date{Inria, 2023-01-18}
+
+\begin{document}
+
+\begin{frame}
+	\centering
+	\includegraphics[width=.3\linewidth]{../../sticker/Garage.pdf}
+	\vspace{1em}
+
+	{\large\bf Alex Auvolat, Deuxfleurs Association}
+	\vspace{1em}
+
+	\url{https://garagehq.deuxfleurs.fr/}
+
+	Matrix channel: \texttt{\#garage:deuxfleurs.fr}
+\end{frame}
+
+\begin{frame}
+	\frametitle{Who I am}
+	\begin{columns}[t]
+		\begin{column}{.2\textwidth}
+			\centering
+			\adjincludegraphics[width=.4\linewidth, valign=t]{assets/alex.jpg}
+		\end{column}
+		\begin{column}{.6\textwidth}
+			\textbf{Alex Auvolat}\\
+			PhD; co-founder of Deuxfleurs
+		\end{column}
+		\begin{column}{.2\textwidth}
+			~
+		\end{column}
+	\end{columns}
+	\vspace{2em}
+
+	\begin{columns}[t]
+		\begin{column}{.2\textwidth}
+			\centering
+			\adjincludegraphics[width=.5\linewidth, valign=t]{assets/deuxfleurs.pdf}
+		\end{column}
+		\begin{column}{.6\textwidth}
+			\textbf{Deuxfleurs}\\
+			A non-profit self-hosting collective,\\
+			member of the CHATONS network
+		\end{column}
+		\begin{column}{.2\textwidth}
+			\centering
+			\adjincludegraphics[width=.7\linewidth, valign=t]{assets/logo_chatons.png}
+		\end{column}
+	\end{columns}
+
+\end{frame}
+
+\begin{frame}
+	\frametitle{Our objective at Deuxfleurs}
+	
+	\begin{center}
+		\textbf{Promote self-hosting and small-scale hosting\\
+			as an alternative to large cloud providers}
+	\end{center}
+	\vspace{2em}
+	\visible<2->{
+		Why is it hard?
+	}
+	\visible<3->{
+		\vspace{2em}
+		\begin{center}
+			\textbf{\underline{Resilience}}\\
+			{\footnotesize (we want good uptime/availability with low supervision)}
+		\end{center}
+	}
+\end{frame}
+
+\begin{frame}
+	\frametitle{How to make a \underline{stable} system}
+
+	Enterprise-grade systems typically employ:
+	\vspace{1em}
+	\begin{itemize}
+		\item RAID
+		\item Redundant power grid + UPS
+		\item Redundant Internet connections
+		\item Low-latency links
+		\item ... 
+	\end{itemize}
+	\vspace{1em}
+	$\to$ it's costly and only worth it at DC scale
+\end{frame}
+
+\begin{frame}
+	\frametitle{How to make a \underline{resilient} system}
+
+	\only<1,4-5>{
+		Instead, we use:
+		\vspace{1em}
+		\begin{itemize}
+			\item \textcolor<2->{gray}{Commodity hardware (e.g. old desktop PCs)}
+				\vspace{.5em}
+			\item<4-> \textcolor<5->{gray}{Commodity Internet (e.g. FTTB, FTTH) and power grid}
+				\vspace{.5em}
+			\item<5-> \textcolor<6->{gray}{\textbf{Geographical redundancy} (multi-site replication)}
+		\end{itemize}
+	}
+	\only<2>{
+		\begin{center}
+			\includegraphics[width=.8\linewidth]{assets/atuin.jpg}
+		\end{center}
+	}
+	\only<3>{
+		\begin{center}
+			\includegraphics[width=.8\linewidth]{assets/neptune.jpg}
+		\end{center}
+	}
+	\only<6>{
+		\begin{center}
+			\includegraphics[width=.5\linewidth]{assets/inframap.jpg}
+		\end{center}
+	}
+\end{frame}
+
+\begin{frame}
+	\frametitle{How to make this happen}
+	\begin{center}
+		\only<1>{\includegraphics[width=.8\linewidth]{assets/slide1.png}}%
+		\only<2>{\includegraphics[width=.8\linewidth]{assets/slide2.png}}%
+		\only<3>{\includegraphics[width=.8\linewidth]{assets/slide3.png}}%
+	\end{center}
+\end{frame}
+
+\begin{frame}
+	\frametitle{Distributed file systems are slow}
+	File systems are complex, for example:
+	\vspace{1em}
+	\begin{itemize}
+		\item Concurrent modification by several processes
+			\vspace{1em}
+		\item Folder hierarchies
+			\vspace{1em}
+		\item Other requirements of the POSIX spec (e.g.~locks)
+	\end{itemize}
+	\vspace{1em}
+	Coordination in a distributed system is costly
+
+	\vspace{1em}
+	Costs explode with commodity hardware / Internet connections\\
+	{\small (we experienced this!)}
+\end{frame}
+
+\begin{frame}
+	\frametitle{A simpler solution: object storage}
+	Only two operations:
+	\vspace{1em}
+	\begin{itemize}
+		\item Put an object at a key
+			\vspace{1em}
+		\item Retrieve an object from its key
+	\end{itemize}
+	\vspace{1em}
+	{\footnotesize (and a few others)}
+
+	\vspace{1em}
+	Sufficient for many applications!
+\end{frame}
+
+\begin{frame}
+	\frametitle{A simpler solution: object storage}
+		\begin{center}
+			\includegraphics[height=6em]{../2020-12-02_wide-team/img/Amazon-S3.jpg}
+			\hspace{3em}
+			\includegraphics[height=5em]{assets/minio.png}
+			\hspace{3em}
+			\includegraphics[height=6em]{../../logo/garage_hires_crop.png}
+		\end{center}
+		\vspace{1em}
+	S3: a de-facto standard, many compatible applications
+
+	\vspace{1em}
+
+	MinIO is self-hostable but not suited for geo-distributed deployments
+
+	\vspace{1em}
+
+	\textbf{Garage is a self-hosted drop-in replacement for the Amazon S3 object store}
+\end{frame}
+
+
+\begin{frame}
+	\frametitle{The data model of object storage}
+	Object storage is basically a key-value store:
+	\vspace{1em}
+
+		\begin{center}
+		\begin{tabular}{|l|p{8cm}|}
+			\hline
+			\textbf{Key: file path + name} & \textbf{Value: file data + metadata} \\
+			\hline
+			\hline
+			\texttt{index.html} &
+				\texttt{Content-Type: text/html; charset=utf-8} \newline
+				\texttt{Content-Length: 24929} \newline
+				\texttt{<binary blob>} \\ 
+			\hline
+			\texttt{img/logo.svg} &
+				\texttt{Content-Type: text/svg+xml} \newline
+				\texttt{Content-Length: 13429} \newline
+				\texttt{<binary blob>} \\ 
+			\hline
+			\texttt{download/index.html} &
+				\texttt{Content-Type: text/html; charset=utf-8} \newline
+				\texttt{Content-Length: 26563} \newline
+				\texttt{<binary blob>} \\ 
+			\hline
+		\end{tabular}
+		\end{center}
+
+\end{frame}
+
+\begin{frame}
+	\frametitle{Garage's architecture}
+	\begin{center}
+		\includegraphics[width=.35\linewidth]{assets/garage.drawio.pdf}
+	\end{center}
+\end{frame}
+
+\begin{frame}
+	\frametitle{Two big problems}
+	\begin{enumerate}
+		\item \textbf{How to place data on different nodes?}\\
+			\vspace{1em}
+			\underline{Constraints:} heterogeneous hardware\\
+			\underline{Objective:} $n$ copies of everything, maximize usable capacity, maximize resilience\\
+			\vspace{1em}
+			$\to$ the Dynamo model + optimization algorithms
+			\vspace{2em}
+		\item<2-> \textbf{How to guarantee consistency?}\\
+			\vspace{1em}
+			\underline{Constraints:} slow network (geographical distance), node unavailability/crashes\\
+			\underline{Objective:} maximize availability, read-after-write guarantee\\
+			\vspace{1em}
+			$\to$ CRDTs, monotonicity, read and write quorums
+	\end{enumerate}
+\end{frame}
+
+\section{Problem 1: placing data}
+
+\begin{frame}
+	\frametitle{Key-value stores, upgraded: the Dynamo model}
+	\textbf{Two keys:}
+	\begin{itemize}
+		\item Partition key: used to divide data into partitions {\small (a.k.a.~shards)}
+		\item Sort key: used to identify items inside a partition
+	\end{itemize}
+
+	\vspace{1em}
+
+	\begin{center}
+	\begin{tabular}{|l|l|p{3cm}|}
+		\hline
+		\textbf{Partition key: bucket} & \textbf{Sort key: filename} & \textbf{Value} \\
+		\hline
+		\hline
+		\texttt{website} & \texttt{index.html} & (file data) \\
+		\hline
+		\texttt{website} & \texttt{img/logo.svg} & (file data) \\
+		\hline
+		\texttt{website} & \texttt{download/index.html} & (file data) \\
+		\hline
+		\hline
+		\texttt{backup} & \texttt{borg/index.2822} & (file data) \\
+		\hline
+		\texttt{backup} & \texttt{borg/data/2/2329} & (file data) \\
+		\hline
+		\texttt{backup} & \texttt{borg/data/2/2680} & (file data) \\
+		\hline
+		\hline
+		\texttt{private} & \texttt{qq3a2nbe1qjq0ebbvo6ocsp6co} & (file data) \\
+		\hline
+	\end{tabular}
+	\end{center}
+\end{frame}
+
+\begin{frame}
+	\frametitle{Key-value stores, upgraded: the Dynamo model}
+	\begin{itemize}
+		\item Data with different partition keys is stored independently,\\
+			on a different set of nodes\\
+			\vspace{.5em}
+			$\to$ no easy way to list all partition keys\\
+			$\to$ no cross-shard transactions\\
+			\vspace{2em}
+		\item Placing data: hash the partition key, select nodes accordingly\\
+			\vspace{.5em}
+			$\to$ distributed hash table (DHT)
+			\vspace{2em}
+		\item For a given value of the partition key, items can be listed using their sort keys
+	\end{itemize}
+\end{frame}
+
+\begin{frame}
+	\frametitle{How to spread files over different cluster nodes?}
+	\textbf{Consistent hashing (Dynamo):}
+	\vspace{1em}
+
+	\begin{center}
+	\only<1>{\includegraphics[width=.40\columnwidth]{assets/consistent_hashing_1.pdf}}%
+	\only<2>{\includegraphics[width=.40\columnwidth]{assets/consistent_hashing_2.pdf}}%
+	\only<3>{\includegraphics[width=.40\columnwidth]{assets/consistent_hashing_3.pdf}}%
+	\only<4>{\includegraphics[width=.40\columnwidth]{assets/consistent_hashing_4.pdf}}%
+	\end{center}
+\end{frame}
+
+\begin{frame}
+	\frametitle{Constraint: location-awareness}
+	\begin{center}
+		\includegraphics[width=\linewidth]{assets/location-aware.png}
+	\end{center}
+	\vspace{2em}
+	Garage replicates data on different zones when possible
+\end{frame}
+
+\begin{frame}
+	\frametitle{Constraint: location-awareness}
+		\begin{center}
+			\includegraphics[width=.8\linewidth]{assets/map.png}
+		\end{center}
+\end{frame}
+
+\begin{frame}
+	\frametitle{Issues with consistent hashing}
+	\begin{itemize}
+		\item Consistent hashing doesn't dispatch data based on geographical location of nodes
+			\vspace{1em}
+		\item<2-> Geographically aware adaptation, try 1:\\
+			data quantities not well balanced between nodes
+			\vspace{1em}
+		\item<3-> Geographically aware adaptation, try 2:\\
+			too many reshuffles when adding/removing nodes
+	\end{itemize}
+\end{frame}
+
+\begin{frame}
+	\frametitle{How to spread files over different cluster nodes?}
+	\textbf{Garage's method: build an index table}
+	\vspace{1em}
+
+	Realization: we can actually precompute an optimal solution
+	\vspace{1em}
+
+	\visible<2->{
+		\begin{center}
+		\begin{tabular}{|l|l|l|l|}
+			\hline
+			\textbf{Partition} & \textbf{Node 1} & \textbf{Node 2} & \textbf{Node 3} \\
+			\hline
+			\hline
+			Partition 0 & Io (jupiter) & Drosera (atuin) & Courgette (neptune) \\
+			\hline
+			Partition 1 & Datura (atuin) & Courgette (neptune) & Io (jupiter) \\
+			\hline
+			Partition 2 & Io(jupiter) & Celeri (neptune) & Drosera (atuin) \\
+			\hline
+			\hspace{1em}$\vdots$ & \hspace{1em}$\vdots$ & \hspace{1em}$\vdots$ & \hspace{1em}$\vdots$ \\
+			\hline
+			Partition 255 & Concombre (neptune) & Io (jupiter) & Drosera (atuin) \\
+			\hline
+		\end{tabular}
+		\end{center}
+	}
+	\vspace{1em}
+	\visible<3->{
+		The index table is built centrally using an optimal algorithm,\\
+		then propagated to all nodes
+	}
+\end{frame}
+
+\begin{frame}
+	\frametitle{The relationship between \emph{partition} and \emph{partition key}}
+	\begin{center}
+	\begin{tabular}{|l|l|l|l|}
+		\hline
+		\textbf{Partition key} & \textbf{Partition} & \textbf{Sort key} & \textbf{Value} \\
+		\hline
+		\hline
+		\texttt{website} & Partition 12 & \texttt{index.html} & (file data) \\
+		\hline
+		\texttt{website} & Partition 12 & \texttt{img/logo.svg} & (file data) \\
+		\hline
+		\texttt{website} & Partition 12 &\texttt{download/index.html} & (file data) \\
+		\hline
+		\hline
+		\texttt{backup} & Partition 42 & \texttt{borg/index.2822} & (file data) \\
+		\hline
+		\texttt{backup} & Partition 42 & \texttt{borg/data/2/2329} & (file data) \\
+		\hline
+		\texttt{backup} & Partition 42 & \texttt{borg/data/2/2680} & (file data) \\
+		\hline
+		\hline
+		\texttt{private} & Partition 42 & \texttt{qq3a2nbe1qjq0ebbvo6ocsp6co} & (file data) \\
+		\hline
+	\end{tabular}
+	\end{center}
+	\vspace{1em}
+	\textbf{To read or write an item:} hash partition key
+	\\ \hspace{5cm} $\to$ determine partition number (first 8 bits)
+	\\ \hspace{5cm} $\to$ find associated nodes
+\end{frame}
+
+\begin{frame}
+	\frametitle{Garage's internal data structures}
+	\centering
+	\includegraphics[width=.75\columnwidth]{assets/garage_tables.pdf}
+\end{frame}
+
+\begin{frame}
+	\frametitle{Storing and retrieving files}
+	\begin{center}
+		\only<1>{\includegraphics[width=.45\linewidth]{assets/garage2a.drawio.pdf}}%
+		\only<2>{\includegraphics[width=.45\linewidth]{assets/garage2b.drawio.pdf}}%
+	\end{center}
+\end{frame}
+
+\section{Problem 2: ensuring consistency}
+
+\begin{frame}
+	\frametitle{Consensus vs weak consistency}
+
+	\hspace{1em}
+	\begin{minipage}{7cm}
+		\textbf{Consensus-based systems:}
+		\vspace{1em}
+		\begin{itemize}
+			\item \textbf{Leader-based:} a leader is elected to coordinate
+				all reads and writes
+				\vspace{1em}
+			\item \textbf{Linearizability} of all operations\\
+				(strongest consistency guarantee)
+				\vspace{1em}
+			\item Any sequential specification can be implemented as a \textbf{replicated state machine}
+				\vspace{1em}
+			\item \textbf{Costly}, the leader is a bottleneck;
+				leader elections on failure take time
+		\end{itemize}
+	\end{minipage}
+	\hfill
+	\begin{minipage}{7cm} \visible<2->{
+		\textbf{Weakly consistent systems:}
+		\vspace{1em}
+		\begin{itemize}
+			\item \textbf{Nodes are equivalent}, any node
+				can originate a read or write operation
+				\vspace{1em}
+			\item \textbf{Read-after-write consistency} with quorums,
+				eventual consistency without
+				\vspace{1em}
+			\item \textbf{Operations have to commute}, i.e.~we
+				can only implement CRDTs
+				\vspace{1em}
+			\item \textbf{Fast}, no single bottleneck;\\
+				works the same with offline nodes
+		\end{itemize}
+	} \end{minipage}
+	\hspace{1em}
+\end{frame}
+
+\begin{frame}
+	\frametitle{Consensus vs weak consistency}
+	\begin{center}
+		\textbf{From a theoretical point of view:}\\
+
+	\end{center}
+	\vspace{2em}
+
+	\hspace{1em}
+	\begin{minipage}{6.5cm}
+		\underline{Consensus-based systems:}
+
+		\vspace{1em}
+
+		Require \textbf{additional assumptions} such as a fault detector or a strong RNG\\
+		(FLP impossibility theorem)
+	\end{minipage}
+	\hfill
+	\begin{minipage}{6.5cm}
+		\underline{Weakly consistent systems:}
+
+		\vspace{1em}
+		
+		Can be implemented in \textbf{any\\asynchronous message passing\\distributed system} with node crashes
+	\end{minipage}
+	\hspace{1em}
+
+	\vspace{3em}
+	\begin{center}
+		They represent \textbf{different classes of computational capability}\\
+	\end{center}
+\end{frame}
+
+\begin{frame}
+	\frametitle{Consensus vs weak consistency}
+	\begin{center}
+		\textbf{The same objects cannot be implemented in both models.}
+	\end{center}
+	\vspace{2em}
+
+	\hspace{1em}
+	\begin{minipage}{6.5cm}
+		\underline{Consensus-based systems:}
+
+		\vspace{1em}
+
+		\textbf{Any sequential specification}\\~
+
+		\vspace{1em}
+		\textbf{Easier to program for}: just write your program as if it were sequential on a single machine
+
+	\end{minipage}
+	\hfill
+	\begin{minipage}{6.5cm}
+		\underline{Weakly consistent systems:}
+
+		\vspace{1em}
+		
+		\textbf{Only CRDTs}\\(conflict-free replicated data types)
+
+		\vspace{1em}
+		Part of the complexity is \textbf{reported to the consumer of the API}\\~
+	\end{minipage}
+	\hspace{1em}
+\end{frame}
+
+\begin{frame}
+	\frametitle{Understanding the power of consensus}
+	\textbf{Consensus:} an API with a single operation, $propose(x)$
+	\begin{enumerate}
+		\item nodes all call $propose(x)$ with their proposed value;
+		\item nodes all receive the same value as a return value, which is one of the proposed values
+	\end{enumerate}
+	\vspace{1em}
+	
+	\visible<2->{
+		\textbf{Equivalent to} a distributed algorithm that gives a total order on all requests
+	}
+	\vspace{1em}
+
+	\visible<3->{
+		\textbf{Implemented by} this simple replicated state machine:
+		\vspace{.5em}
+		\begin{figure}
+			\centering
+			\def\svgwidth{.5\textwidth}
+			\large
+			\import{assets/}{consensus.pdf_tex}
+		\end{figure}
+		\vspace{1em}
+	}
+\end{frame}
+
+\begin{frame}
+	\frametitle{Can my object be implemented without consensus?}
+	\underline{Given the specification of an API:}
+	\vspace{2em}
+	\begin{itemize}
+		\item \textbf{Using this API, we can implement the consensus object} (the $propose$ function)\\
+			$\to$ the API is equivalent to consensus/total ordering of messages\\
+			$\to$ the API cannot be implemented in a weakly consistent system
+			\vspace{2em}
+		\item<2-> \textbf{This API can be implemented using only weak primitives}\\
+			(e.g. in the asynchronous message passing model with no further assumption)\\
+			$\to$ the API is strictly weaker than consensus\\
+			$\to$ we can implement it in Garage!
+	\end{itemize}
+\end{frame}
+
+\begin{frame}
+	\frametitle{Why avoid consensus?}
+	Consensus can be implemented reasonably well in practice, so why avoid it?
+	\vspace{2em}
+	\begin{itemize}
+		\item \textbf{Software complexity:} RAFT and PAXOS are complex beasts;\\
+			harder to prove, harder to reason about
+			\vspace{1.5em}
+		\item \textbf{Performance issues:}
+			\vspace{1em}
+			\begin{itemize}
+				\item Theoretical requirements (RNG, failure detector) translate into \textbf{practical costs}
+					\vspace{1em}
+				\item The leader is a \textbf{bottleneck} for all requests;\\
+					even in leaderless approaches, \textbf{all nodes must process all operations in order}
+					\vspace{1em}
+				\item Particularly \textbf{sensitive to higher latency} between nodes
+			\end{itemize}
+	\end{itemize}
+\end{frame}
+
+\begin{frame}
+	\frametitle{Performance gains in practice}
+	\begin{center}
+		\includegraphics[width=.8\linewidth]{assets/endpoint-latency-dc.png}
+	\end{center}
+\end{frame}
+
+\begin{frame}
+	\frametitle{What can we implement without consensus?}
+	\begin{itemize}
+		\item Any \textbf{conflict-free replicated data type} (CRDT)
+			\vspace{1em}
+		\item<2-> Non-transactional key-value stores such as S3 are equivalent to a simple CRDT:\\
+			a map of \textbf{last-writer-wins registers} (each key is its own CRDT)
+			\vspace{1em}
+		\item<3-> \textbf{Read-after-write consistency} can be implemented
+			using quorums on read and write operations
+			\vspace{1em}
+		\item<4-> \textbf{Monotonicity of reads} can be implemented with repair-on-read\\
+			(makes reads more costly, not implemented in Garage)
+	\end{itemize}
+\end{frame}
+
+\begin{frame}
+	\frametitle{CRDTs and quorums: read-after-write consistency}
+	\begin{figure}
+		\centering
+		\def\svgwidth{.8\textwidth}
+		\only<1>{\import{assets/}{lattice1.pdf_tex}}%
+		\only<2>{\import{assets/}{lattice2.pdf_tex}}%
+		\only<3>{\import{assets/}{lattice3.pdf_tex}}%
+		\only<4>{\import{assets/}{lattice4.pdf_tex}}%
+		\only<5>{\import{assets/}{lattice5.pdf_tex}}%
+		\only<6>{\import{assets/}{lattice6.pdf_tex}}%
+		\only<7>{\import{assets/}{lattice7.pdf_tex}}%
+		\only<8>{\import{assets/}{lattice8.pdf_tex}}%
+	\end{figure}
+\end{frame}
+
+\begin{frame}
+	\frametitle{CRDTs and quorums: read-after-write consistency}
+	\textbf{Property:} If node $A$ did an operation $write(x)$ and received an OK response,\\
+		\hspace{2cm} and node $B$ starts an operation $read()$ after $A$ received OK,\\
+		\hspace{2cm} then $B$ will read a value $x' \sqsupseteq x$.
+
+	\vspace{1em}
+
+	\hspace{1em}
+	\begin{minipage}{6.8cm}
+		\textbf{Algorithm $write(x)$:}
+		\begin{enumerate}
+			\item Broadcast $write(x)$ to all nodes
+			\item Wait for $k > n/2$ nodes to reply OK
+			\item Return OK
+		\end{enumerate}
+	\end{minipage}
+	\hfill
+	\begin{minipage}{6.8cm}
+		\vspace{1em}
+		\textbf{Algorithm $read()$:}
+		\begin{enumerate}
+			\item Broadcast $read()$ to all nodes
+			\item Wait for $k > n/2$ nodes to reply\\
+				with values $x_1, \dots, x_k$
+			\item Return $x_1 \sqcup \dots \sqcup x_k$
+		\end{enumerate}
+	\end{minipage}
+	\hspace{1em}
+
+	\vspace{2em}
+	\textbf{Why does it work?} There is at least one node at the intersection between the two sets of nodes that replied to each request, that ``saw'' $x$ before the $read()$ started ($x_i \sqsupseteq x$).
+\end{frame}
+
+\begin{frame}
+	\frametitle{CRDTs and quorums: monotonic-reads consistency}
+	\begin{figure}
+		\centering
+		\def\svgwidth{.8\textwidth}
+		\only<1>{\import{assets/}{latticeB_1.pdf_tex}}%
+		\only<2>{\import{assets/}{latticeB_2.pdf_tex}}%
+		\only<3>{\import{assets/}{latticeB_3.pdf_tex}}%
+		\only<4>{\import{assets/}{latticeB_4.pdf_tex}}%
+		\only<5>{\import{assets/}{latticeB_5.pdf_tex}}%
+		\only<6>{\import{assets/}{latticeB_6.pdf_tex}}%
+		\only<7>{\import{assets/}{latticeB_7.pdf_tex}}%
+		\only<8>{\import{assets/}{latticeB_8.pdf_tex}}%
+		\only<9>{\import{assets/}{latticeB_9.pdf_tex}}%
+		\only<10>{\import{assets/}{latticeB_10.pdf_tex}}%
+	\end{figure}
+\end{frame}
+
+\begin{frame}
+	\frametitle{CRDTs and quorums: monotonic-reads consistency}
+	\textbf{Property:} If node $A$ did an operation $read()$ and received $x$ as a response,\\
+		\hspace{2cm} and node $B$ starts an operation $read()$ after $A$ received $x$,\\
+		\hspace{2cm} then $B$ will read a value $x' \sqsupseteq x$.
+
+	\vspace{1em}
+
+	\textbf{Algorithm $monotonic\_read()$:} {\small (a.k.a. repair-on-read)}
+	\begin{enumerate}
+		\item Broadcast $read()$ to all nodes
+		\item Wait for $k > n/2$ nodes to reply with values $x_1, \dots, x_k$
+		\item If $x_i \ne x_j$ for some nodes $i$ and $j$,\\
+			\hspace{1cm}then call $write(x_1 \sqcup \dots \sqcup x_k)$ and wait for OK from $k' > n/2$ nodes
+		\item Return $x_1 \sqcup \dots \sqcup x_k$
+	\end{enumerate}
+
+	\vspace{1em}
+
+	This makes reads slower in some cases, and is \textbf{not implemented in Garage}.
+\end{frame}
+
+\begin{frame}
+	\frametitle{A hard problem: layout changes}
+	\begin{itemize}
+		\item We rely on quorums $k > n/2$ within each partition:\\
+			$$n=3,~~~~~~~k\ge 2$$
+		\item<2-> When rebalancing, the set of nodes responsible for a partition can change:\\
+			$$\{n_A, n_B, n_C\} \to \{n_A, n_D, n_E\}$$
+			\vspace{.01em}
+		\item<3-> During the rebalancing, $D$ and $E$ don't yet have the data,\\
+			~~~~~~~~~~~~~~~~~~~and $B$ and $C$ want to get rid of the data to free up space\\
+			\vspace{.2em}
+			$\to$ quorums only within the new set of nodes don't work\\
+			$\to$ how to coordinate? \textbf{currently, we don't...}
+
+	\end{itemize}
+\end{frame}
+
+\section{Going further than the S3 API}
+
+\begin{frame}
+	\frametitle{Using Garage for everything}
+	\begin{center}
+		\only<1>{\includegraphics[width=.8\linewidth]{assets/slideB1.png}}%
+		\only<2>{\includegraphics[width=.8\linewidth]{assets/slideB2.png}}%
+		\only<3>{\includegraphics[width=.8\linewidth]{assets/slideB3.png}}%
+	\end{center}
+\end{frame}
+
+\begin{frame}
+	\frametitle{K2V Design}
+	\begin{itemize}
+		\item A new, custom, minimal API\\
+			\vspace{.5em}
+			\begin{itemize}
+				\item Single-item operations
+				\item Operations on ranges and batches of items
+				\item Polling operations to help implement a PubSub pattern
+			\end{itemize}
+			\vspace{1em}
+		\item<2-> Exposes the partitoning mechanism of Garage\\
+			K2V = partition key / sort key / value (like Dynamo)
+			\vspace{1em}
+		\item<3-> Weakly consistent, CRDT-friendly\\
+			$\to$ no support for transactions (not ACID)
+			\vspace{1em}
+		\item<4-> Cryptography-friendly: values are binary blobs
+	\end{itemize}
+\end{frame}
+
+\begin{frame}
+	\frametitle{Handling concurrent values}
+	\textbf{How to handle concurrency?} Example:
+	\vspace{1em}
+	\begin{enumerate}
+		\item Client $A$ reads the initial value of a key, $x_0$
+			\vspace{1em}
+		\item<2-> Client $B$ also reads the initial value $x_0$ of that key
+			\vspace{1em}
+		\item<3-> Client $A$ modifies $x_0$, and writes a new value $x_1$
+			\vspace{1em}
+		\item<4-> Client $B$ also modifies $x_0$, and writes a new value $x'_1$,\\
+			without having a chance to first read $x_1$\\
+			\vspace{1em}
+			$\to$ what should the final state be?
+	\end{enumerate}
+\end{frame}
+
+\begin{frame}
+	\frametitle{Handling concurrent values}
+	\begin{itemize}
+		\item If we keep only $x_1$ or $x'_1$, we risk \textbf{loosing application data}
+			\vspace{1.5em}
+		\item<2-> Values are opaque binary blobs, \textbf{K2V cannot resolve conflicts} by itself\\
+			(e.g. by implementing a CRDT)
+			\vspace{1.5em}
+		\item<3-> Solution: \textbf{we keep both!}\\
+			$\to$ the value of the key is now $\{x_1, x'_1\}$\\
+			$\to$ the client application can decide how to resolve conflicts on the next read
+	\end{itemize}
+\end{frame}
+
+\begin{frame}
+	\frametitle{Keeping track of causality}
+	How does K2V know that $x_1$ and $x'_1$ are concurrent?
+	\vspace{1em}
+	\begin{itemize}
+		\item $read()$ returns \textbf{a set of values} and an associated \textbf{causality token}\\
+			\vspace{1.5em}
+		\item<2-> When calling $write()$, the client sends \textbf{the causality token from its last read}
+			\vspace{1.5em}
+		\item<3-> The causality token represents the set of values \textbf{already seen by the client}\\
+			$\to$ those values are the \textbf{causal past} of the write operation\\
+			$\to$ K2V can keep concurrent values and overwrite all ones in the causal past
+			\vspace{1.5em}
+		\item<4-> Internally, the causality token is \textbf{a vector clock}
+	\end{itemize}
+\end{frame}
+
+\begin{frame}
+	\frametitle{Application: an e-mail storage server}
+	\begin{center}
+		\only<1>{\includegraphics[width=.9\linewidth]{assets/aerogramme.png}}%
+	\end{center}
+\end{frame}
+
+\begin{frame}
+	\frametitle{Aerogramme data model}
+	\begin{center}
+		\only<1>{\includegraphics[width=.4\linewidth]{assets/aerogramme_datatype.drawio.pdf}}%
+		\only<2->{\includegraphics[width=.9\linewidth]{assets/aerogramme_keys.drawio.pdf}\vspace{1em}}%
+	\end{center}
+	\visible<3->{Aerogramme encrypts all stored values for privacy\\
+	(Garage server administrators can't read your mail)}
+\end{frame}
+
+\begin{frame}
+	\frametitle{Different deployment scenarios}
+	\begin{center}
+		\only<1>{\includegraphics[width=.9\linewidth]{assets/aerogramme_components1.drawio.pdf}}%
+		\only<2>{\includegraphics[width=.9\linewidth]{assets/aerogramme_components2.drawio.pdf}}%
+	\end{center}
+\end{frame}
+
+\begin{frame}
+	\frametitle{A new model for building resilient software}
+	How to build an application using only Garage as a data store:
+	\vspace{1em}
+	\begin{enumerate}
+		\item Design a data model suited to K2V\\
+			{\footnotesize (see Cassandra docs on porting SQL data models to Cassandra)}
+			\vspace{1em}
+			\begin{itemize}
+				\item Use CRDTs or other eventually consistent data types (see e.g. Bayou)
+					\vspace{1em}
+				\item Store opaque binary blobs to provide End-to-End Encryption\\
+			\end{itemize}
+			\vspace{1em}
+		\item<2-> Store big blobs (files) using the S3 API
+			\vspace{1em}
+		\item<3-> Let Garage manage sharding, replication, failover, etc.
+	\end{enumerate}
+\end{frame}
+
+\section{Conclusion}
+
+\begin{frame}
+	\frametitle{Perspectives}
+	\begin{itemize}
+		\item Fix the consistency issue when rebalancing
+			\vspace{1em}
+		\item Write about Garage's architecture and properties,\\
+			and about our proposed architecture for (E2EE) apps over K2V+S3
+			\vspace{1em}
+		\item Continue developing Garage; finish Aerogramme; build new applications...
+			\vspace{1em}
+		\item Anything else?
+	\end{itemize}
+\end{frame}
+
+\begin{frame}
+	\frametitle{Where to find us}
+	\begin{center}
+			\includegraphics[width=.25\linewidth]{../../logo/garage_hires.png}\\
+			\vspace{-1em}
+		\url{https://garagehq.deuxfleurs.fr/}\\
+		\url{mailto:garagehq@deuxfleurs.fr}\\
+		\texttt{\#garage:deuxfleurs.fr} on Matrix
+
+		\vspace{1.5em}
+			\includegraphics[width=.06\linewidth]{assets/rust_logo.png}
+			\includegraphics[width=.13\linewidth]{assets/AGPLv3_Logo.png}
+	\end{center}
+\end{frame}
+
+\end{document}
+
+%% vim: set ts=4 sw=4 tw=0 noet spelllang=en :

doc/talks/shell.nix

@@ -0,0 +1,12 @@
+{ pkgs ? import <nixpkgs> { } }:
+let
+  latex = (pkgs.texlive.combine {
+    inherit (pkgs.texlive)
+    scheme-basic 
+    beamer amsmath mathtools breqn
+    environ 
+    multirow graphics import adjustbox tabu vwcol stmaryrd ulem ragged2e
+    dvisvgm dvipng wrapfig hyperref capt-of;
+  });
+in pkgs.mkShell { nativeBuildInputs = [ pkgs.gnumake latex ]; }
+

flake.nix

@@ -1,7 +1,9 @@
 {
-  description = "Garage, an S3-compatible distributed object store for self-hosted deployments";
+  description =
+    "Garage, an S3-compatible distributed object store for self-hosted deployments";
 
-  inputs.nixpkgs.url = "github:NixOS/nixpkgs/a3073c49bc0163fea6a121c276f526837672b555";
+  inputs.nixpkgs.url =
+    "github:NixOS/nixpkgs/a3073c49bc0163fea6a121c276f526837672b555";
   inputs.cargo2nix = {
     # As of 2022-10-18: two small patches over unstable branch, one for clippy and one to fix feature detection
     url = "github:Alexis211/cargo2nix/a7a61179b66054904ef6a195d8da736eaaa06c36";
@@ -24,13 +26,11 @@
             release = true;
           }).workspace.garage { compileMode = "build"; };
         };
-        devShell = ((compile {
+        devShell = (compile {
           inherit system git_version;
           pkgsSrc = nixpkgs;
           cargo2nixOverlay = cargo2nix.overlays.default;
           release = false;
-        }).workspaceShell {
-          packages = [ pkgs.rustfmt cargo2nix.packages.${system}.default ];
-        });
+        }).workspaceShell { packages = [ pkgs.rustfmt ]; };
       });
 }

nix/build_index.nix

@@ -1,10 +1,8 @@
-{
-  path ? "/../aws-list.txt",
-}:
+{ path ? "/../aws-list.txt", }:
 
 with import ./common.nix;
 let
-  pkgs = import pkgsSrc {};
+  pkgs = import pkgsSrc { };
   lib = pkgs.lib;
 
   /* Converts a key list and a value list to a set
@@ -14,138 +12,181 @@ let
        => { name = "latex"; version = "3.14"; }
   */
   listToSet = keys: values:
-    builtins.listToAttrs 
-      (lib.zipListsWith 
-        (a: b: { name = a; value = b; }) 
-        keys
-        values);
+    builtins.listToAttrs (lib.zipListsWith (a: b: {
+      name = a;
+      value = b;
+    }) keys values);
 
   /* Says if datetime a is more recent than datetime b
 
-    Example:
-      cmpDate { date = "2021-09-10"; time = "22:12:15"; } { date = "2021-02-03"; time = "23:54:12"; }
-      => true
+     Example:
+       cmpDate { date = "2021-09-10"; time = "22:12:15"; } { date = "2021-02-03"; time = "23:54:12"; }
+       => true
   */
   cmpDate = a: b:
-    let da = (builtins.head a.builds).date;
-        db = (builtins.head b.builds).date;
-    in 
-      if da == db then  (builtins.head a.builds).time > (builtins.head b.builds).time
-      else da > db;
+    let
+      da = (builtins.head a.builds).date;
+      db = (builtins.head b.builds).date;
+    in if da == db then
+      (builtins.head a.builds).time > (builtins.head b.builds).time
+    else
+      da > db;
 
-  /* Pretty platforms */
+  # Pretty platforms
   prettyPlatform = name:
-    if name == "aarch64-unknown-linux-musl" then "linux/arm64"
-    else if name == "armv6l-unknown-linux-musleabihf" then "linux/arm"
-    else if name == "x86_64-unknown-linux-musl" then "linux/amd64"
-    else if name == "i686-unknown-linux-musl" then "linux/386"
-    else name;
+    if name == "aarch64-unknown-linux-musl" then
+      "linux/arm64"
+    else if name == "armv6l-unknown-linux-musleabihf" then
+      "linux/arm"
+    else if name == "x86_64-unknown-linux-musl" then
+      "linux/amd64"
+    else if name == "i686-unknown-linux-musl" then
+      "linux/386"
+    else
+      name;
 
-  /* Parsing */
+  # Parsing
   list = builtins.readFile (./. + path);
   entries = lib.splitString "\n" list;
 
-  elems = builtins.filter 
-    (e: (builtins.length e) == 4) 
-    (map 
-      (x: builtins.filter (e: e != "") (lib.splitString " " x)) 
-      entries);
+  elems = builtins.filter (e: (builtins.length e) == 4)
+    (map (x: builtins.filter (e: e != "") (lib.splitString " " x)) entries);
 
-  keys = ["date" "time" "size" "path"];
+  keys = [ "date" "time" "size" "path" ];
   parsed = map (entry: listToSet keys entry) elems;
 
-  subkeys = ["root" "version" "platform" "binary" ];
-  builds = map (entry: entry // listToSet subkeys (lib.splitString "/" entry.path) // { url = "https://garagehq.deuxfleurs.fr/" + entry.path; }) parsed;
+  subkeys = [ "root" "version" "platform" "binary" ];
+  builds = map (entry:
+    entry // listToSet subkeys (lib.splitString "/" entry.path) // {
+      url = "https://garagehq.deuxfleurs.fr/" + entry.path;
+    }) parsed;
 
-  /* Aggregation */
-  builds_per_version = lib.foldl (acc: v: acc // { ${v.version} = if builtins.hasAttr v.version acc then acc.${v.version} ++ [ v ] else [ v ]; }) {} builds; 
+  # Aggregation
+  builds_per_version = lib.foldl (acc: v:
+    acc // {
+      ${v.version} = if builtins.hasAttr v.version acc then
+        acc.${v.version} ++ [ v ]
+      else
+        [ v ];
+    }) { } builds;
 
   versions = builtins.attrNames builds_per_version;
-  versions_release = builtins.filter (x: builtins.match "v[0-9]+\.[0-9]+\.[0-9]+(\.[0-9]+)?" x != null) versions;
-  versions_commit = builtins.filter (x: builtins.match "[0-9a-f]{40}" x != null) versions;
-  versions_extra = lib.subtractLists (versions_release ++ versions_commit) versions;
+  versions_release = builtins.filter
+    (x: builtins.match "v[0-9]+.[0-9]+.[0-9]+(.[0-9]+)?" x != null) versions;
+  versions_commit =
+    builtins.filter (x: builtins.match "[0-9a-f]{40}" x != null) versions;
+  versions_extra =
+    lib.subtractLists (versions_release ++ versions_commit) versions;
 
   sorted_builds = [
     {
       name = "Release";
       hide = false;
       type = "tag";
-      description = "Release builds are the official builds, they are tailored for productions and are the most tested.";
-      builds =  builtins.sort (a: b: a.version > b.version) (map (x: { version = x; builds = builtins.getAttr x builds_per_version; }) versions_release);
+      description =
+        "Release builds are the official builds, they are tailored for productions and are the most tested.";
+      builds = builtins.sort (a: b: a.version > b.version) (map (x: {
+        version = x;
+        builds = builtins.getAttr x builds_per_version;
+      }) versions_release);
     }
     {
       name = "Extra";
       hide = true;
       type = "tag";
-      description = "Extra builds are built on demand to test a specific feature or a specific need.";
-      builds = builtins.sort cmpDate (map (x: { version = x; builds = builtins.getAttr x builds_per_version; }) versions_extra);
+      description =
+        "Extra builds are built on demand to test a specific feature or a specific need.";
+      builds = builtins.sort cmpDate (map (x: {
+        version = x;
+        builds = builtins.getAttr x builds_per_version;
+      }) versions_extra);
     }
     {
       name = "Development";
       hide = true;
       type = "commit";
-      description = "Development builds are built periodically. Use them if you want to test a specific feature that is not yet released.";
-      builds = builtins.sort cmpDate (map (x: { version = x; builds = builtins.getAttr x builds_per_version; }) versions_commit);
+      description =
+        "Development builds are built periodically. Use them if you want to test a specific feature that is not yet released.";
+      builds = builtins.sort cmpDate (map (x: {
+        version = x;
+        builds = builtins.getAttr x builds_per_version;
+      }) versions_commit);
     }
   ];
 
-  json = pkgs.writeTextDir "share/_releases.json" (builtins.toJSON sorted_builds);
+  json =
+    pkgs.writeTextDir "share/_releases.json" (builtins.toJSON sorted_builds);
   html = pkgs.writeTextDir "share/_releases.html" ''
-<!doctype html>
-<html>
-  <head>
-    <meta charset="utf-8" />
-    <title>Garage releases</title>
-    <style>
-      html, body { margin:0; padding: 0 }
-      body { font-family: 'Helvetica', Sans; }
-      section { margin: 1rem; }
-      ul { padding:0; margin: 0.2rem }
-      li {
-        border-radius: 0.2rem;
-        display: inline; 
-        border: 2px #0b5d83 solid; 
-        padding: 0.5rem; 
-        line-height: 3rem;
-        color: #0b5d83;
-      }
-      li:hover { background-color: #0b5d83; color: #fff; }
-      li a, li a:hover { color: inherit; text-decoration: none }
-    </style>
-  </head>
-  <body>
-   ${ builtins.toString (lib.forEach sorted_builds (r: ''
-    <section>
-      <h2>${r.name} builds</h2>
+    <!doctype html>
+    <html>
+      <head>
+        <meta charset="utf-8" />
+        <title>Garage releases</title>
+        <style>
+          html, body { margin:0; padding: 0 }
+          body { font-family: 'Helvetica', Sans; }
+          section { margin: 1rem; }
+          ul { padding:0; margin: 0.2rem }
+          li {
+            border-radius: 0.2rem;
+            display: inline; 
+            border: 2px #0b5d83 solid; 
+            padding: 0.5rem; 
+            line-height: 3rem;
+            color: #0b5d83;
+          }
+          li:hover { background-color: #0b5d83; color: #fff; }
+          li a, li a:hover { color: inherit; text-decoration: none }
+        </style>
+      </head>
+      <body>
+       ${
+         builtins.toString (lib.forEach sorted_builds (r: ''
+           <section>
+             <h2>${r.name} builds</h2>
 
-      <p>${r.description}</p>
+             <p>${r.description}</p>
 
-      ${if r.hide then "<details><summary>Show ${r.name} builds</summary>" else ""}
-      ${ builtins.toString (lib.forEach r.builds (x: ''
-        <h3> ${x.version} (${(builtins.head x.builds).date}) </h3>
-        <p>See this build on</p>
-        <p> Binaries:
-        <ul>
-        ${ builtins.toString (lib.forEach x.builds (b: ''
-          <li><a href="/${b.path}">${prettyPlatform b.platform}</a></li>
-        ''))}
-        </ul></p>
-        <p> Sources:
-        <ul>
-         <li><a href="https://git.deuxfleurs.fr/Deuxfleurs/garage/src/${r.type}/${x.version}">gitea</a></li>
-         <li><a href="https://git.deuxfleurs.fr/Deuxfleurs/garage/archive/${x.version}.zip">.zip</a></li>
-         <li><a href="https://git.deuxfleurs.fr/Deuxfleurs/garage/archive/${x.version}.tar.gz">.tar.gz</a></li>
-        </ul></p>
-      ''))  }
-      ${ if builtins.length r.builds == 0 then "<em>There is no build for this category</em>" else "" }
-      ${if r.hide then "</details>" else ""}
-    </section>
-  ''))}
-  </body>
-</html>
-'';
-in
-  pkgs.symlinkJoin {
-    name = "releases";
-    paths = [ json html ];
-  }
+             ${
+               if r.hide then
+                 "<details><summary>Show ${r.name} builds</summary>"
+               else
+                 ""
+             }
+             ${
+               builtins.toString (lib.forEach r.builds (x: ''
+                 <h3> ${x.version} (${(builtins.head x.builds).date}) </h3>
+                 <p>See this build on</p>
+                 <p> Binaries:
+                 <ul>
+                 ${builtins.toString (lib.forEach x.builds (b: ''
+                   <li><a href="/${b.path}">${
+                     prettyPlatform b.platform
+                   }</a></li>
+                 ''))}
+                 </ul></p>
+                 <p> Sources:
+                 <ul>
+                  <li><a href="https://git.deuxfleurs.fr/Deuxfleurs/garage/src/${r.type}/${x.version}">gitea</a></li>
+                  <li><a href="https://git.deuxfleurs.fr/Deuxfleurs/garage/archive/${x.version}.zip">.zip</a></li>
+                  <li><a href="https://git.deuxfleurs.fr/Deuxfleurs/garage/archive/${x.version}.tar.gz">.tar.gz</a></li>
+                 </ul></p>
+               ''))
+             }
+             ${
+               if builtins.length r.builds == 0 then
+                 "<em>There is no build for this category</em>"
+               else
+                 ""
+             }
+             ${if r.hide then "</details>" else ""}
+           </section>
+         ''))
+       }
+      </body>
+    </html>
+  '';
+in pkgs.symlinkJoin {
+  name = "releases";
+  paths = [ json html ];
+}

nix/common.nix

@@ -1,10 +1,9 @@
 rec {
-  /*
-   * Fixed dependencies
-   */
+  # * Fixed dependencies
   pkgsSrc = fetchTarball {
     # As of 2022-10-13
-    url = "https://github.com/NixOS/nixpkgs/archive/a3073c49bc0163fea6a121c276f526837672b555.zip";
+    url =
+      "https://github.com/NixOS/nixpkgs/archive/a3073c49bc0163fea6a121c276f526837672b555.zip";
     sha256 = "1bz632psfbpmicyzjb8b4265y50shylccvfm6ry6mgnv5hvz324s";
   };
   cargo2nixSrc = fetchGit {
@@ -14,9 +13,7 @@ rec {
     rev = "a7a61179b66054904ef6a195d8da736eaaa06c36";
   };
 
-  /*
-   * Shared objects
-   */
+  # * Shared objects
   cargo2nix = import cargo2nixSrc;
   cargo2nixOverlay = cargo2nix.overlays.default;
 }

nix/compile.nix

@@ -1,227 +1,240 @@
-{
-  system,
-  target ? null,
-  pkgsSrc,
-  cargo2nixOverlay,
-  compiler ? "rustc",
-  release ? false,
-  git_version ? null,
-  features ? null,
-}:
+{ system, target ? null, pkgsSrc, cargo2nixOverlay, compiler ? "rustc"
+, release ? false, git_version ? null, features ? null, }:
 
 let
   log = v: builtins.trace v v;
 
-  pkgs =
-    if target != null then
-      import pkgsSrc {
-        inherit system;
-        crossSystem = {
-          config = target;
-          isStatic = true;
-        };
-        overlays = [ cargo2nixOverlay ];
-      }
-    else
-      import pkgsSrc {
-        inherit system;
-        overlays = [ cargo2nixOverlay ];
-      };
-
-  /*
-   Cargo2nix is built for rustOverlay which installs Rust from Mozilla releases.
-   This is fine for 64-bit platforms, but for 32-bit platforms, we need our own Rust
-   to avoid incompatibilities with time_t between different versions of musl
-   (>= 1.2.0 shipped by NixOS, < 1.2.0 with which rustc was built), which lead to compilation breakage.
-   So we want a Rust release that is bound to our Nix repository to avoid these problems.
-   See here for more info: https://musl.libc.org/time64.html
-   Because Cargo2nix does not support the Rust environment shipped by NixOS,
-   we emulate the structure of the Rust object created by rustOverlay.
-   In practise, rustOverlay ships rustc+cargo in a single derivation while
-   NixOS ships them in separate ones. We reunite them with symlinkJoin.
-  */
-  toolchainOptions =
-    if target == null || target == "x86_64-unknown-linux-musl" || target == "aarch64-unknown-linux-musl" then {
-      rustVersion = "1.63.0";
-      extraRustComponents = [ "clippy" ];
-    } else {
-      rustToolchain = pkgs.symlinkJoin {
-        name = "rust-static-toolchain-${target}";
-        paths = [
-          pkgs.rustPlatform.rust.cargo
-          pkgs.rustPlatform.rust.rustc
-          # clippy not needed, it only runs on amd64
-        ];
+  pkgs = if target != null then
+    import pkgsSrc {
+      inherit system;
+      crossSystem = {
+        config = target;
+        isStatic = true;
       };
+      overlays = [ cargo2nixOverlay ];
+    }
+  else
+    import pkgsSrc {
+      inherit system;
+      overlays = [ cargo2nixOverlay ];
     };
 
-
-  buildEnv = (drv: {
-    rustc = drv.setBuildEnv;
-    clippy = ''
-      ${drv.setBuildEnv or "" }
-      echo
-      echo --- BUILDING WITH CLIPPY ---
-      echo
-
-      export NIX_RUST_BUILD_FLAGS="''${NIX_RUST_BUILD_FLAGS} --deny warnings"
-      export RUSTC="''${CLIPPY_DRIVER}"
-    '';
-  }.${compiler});
-
-  /*
-   Cargo2nix provides many overrides by default, you can take inspiration from them:
-   https://github.com/cargo2nix/cargo2nix/blob/master/overlay/overrides.nix
-
-   You can have a complete list of the available options by looking at the overriden object, mkcrate:
-   https://github.com/cargo2nix/cargo2nix/blob/master/overlay/mkcrate.nix
+  /* Cargo2nix is built for rustOverlay which installs Rust from Mozilla releases.
+     This is fine for 64-bit platforms, but for 32-bit platforms, we need our own Rust
+     to avoid incompatibilities with time_t between different versions of musl
+     (>= 1.2.0 shipped by NixOS, < 1.2.0 with which rustc was built), which lead to compilation breakage.
+     So we want a Rust release that is bound to our Nix repository to avoid these problems.
+     See here for more info: https://musl.libc.org/time64.html
+     Because Cargo2nix does not support the Rust environment shipped by NixOS,
+     we emulate the structure of the Rust object created by rustOverlay.
+     In practise, rustOverlay ships rustc+cargo in a single derivation while
+     NixOS ships them in separate ones. We reunite them with symlinkJoin.
   */
-  packageOverrides = pkgs: pkgs.rustBuilder.overrides.all ++ [
-    /*
-     [1] We add some logic to compile our crates with clippy, it provides us many additional lints
+  toolchainOptions = if target == null || target == "x86_64-unknown-linux-musl"
+  || target == "aarch64-unknown-linux-musl" then {
+    rustVersion = "1.63.0";
+    extraRustComponents = [ "clippy" ];
+  } else {
+    rustToolchain = pkgs.symlinkJoin {
+      name = "rust-static-toolchain-${target}";
+      paths = [
+        pkgs.rustPlatform.rust.cargo
+        pkgs.rustPlatform.rust.rustc
+        # clippy not needed, it only runs on amd64
+      ];
+    };
+  };
 
-     [2] We need to alter Nix hardening to make static binaries: PIE,
-     Position Independent Executables seems to be supported only on amd64. Having
-     this flag set either 1. make our executables crash or 2. compile as dynamic on some platforms.
-     Here, we deactivate it. Later (find `codegenOpts`), we reactivate it for supported targets
-     (only amd64 curently) through the `-static-pie` flag.
-     PIE is a feature used by ASLR, which helps mitigate security issues.
-     Learn more about Nix Hardening at: https://github.com/NixOS/nixpkgs/blob/master/pkgs/build-support/cc-wrapper/add-hardening.sh
+  buildEnv = (drv:
+    {
+      rustc = drv.setBuildEnv;
+      clippy = ''
+        ${drv.setBuildEnv or ""}
+        echo
+        echo --- BUILDING WITH CLIPPY ---
+        echo
 
-     [3] We want to inject the git version while keeping the build deterministic.
-     As we do not want to consider the .git folder as part of the input source,
-     we ask the user (the CI often) to pass the value to Nix.
+        export NIX_RUST_BUILD_FLAGS="''${NIX_RUST_BUILD_FLAGS} --deny warnings"
+        export RUSTC="''${CLIPPY_DRIVER}"
+      '';
+    }.${compiler});
 
-     [4] We don't want libsodium-sys and zstd-sys to try to use pkgconfig to build against a system library.
-     However the features to do so get activated for some reason (due to a bug in cargo2nix?),
-     so disable them manually here.
-    */
-    (pkgs.rustBuilder.rustLib.makeOverride {
-      name = "garage";
-      overrideAttrs = drv:
-        (if git_version != null then {
-          /* [3] */ preConfigure = ''
-            ${drv.preConfigure or ""}
-            export GIT_VERSION="${git_version}"
-          '';
-        } else {})
-        //
-      {
-        /* [1] */ setBuildEnv = (buildEnv drv);
-        /* [2] */ hardeningDisable = [ "pie" ];
-      };
-    })
+  /* Cargo2nix provides many overrides by default, you can take inspiration from them:
+     https://github.com/cargo2nix/cargo2nix/blob/master/overlay/overrides.nix
 
-    (pkgs.rustBuilder.rustLib.makeOverride {
-      name = "garage_rpc";
-      overrideAttrs = drv: { /* [1] */ setBuildEnv = (buildEnv drv); };
-    })
-
-    (pkgs.rustBuilder.rustLib.makeOverride {
-      name = "garage_db";
-      overrideAttrs = drv: { /* [1] */ setBuildEnv = (buildEnv drv); };
-    })
-
-    (pkgs.rustBuilder.rustLib.makeOverride {
-      name = "garage_util";
-      overrideAttrs = drv: { /* [1] */ setBuildEnv = (buildEnv drv); };
-    })
-
-    (pkgs.rustBuilder.rustLib.makeOverride {
-      name = "garage_table";
-      overrideAttrs = drv: { /* [1] */ setBuildEnv = (buildEnv drv); };
-    })
-
-    (pkgs.rustBuilder.rustLib.makeOverride {
-      name = "garage_block";
-      overrideAttrs = drv: { /* [1] */ setBuildEnv = (buildEnv drv); };
-    })
-
-    (pkgs.rustBuilder.rustLib.makeOverride {
-      name = "garage_model";
-      overrideAttrs = drv: { /* [1] */ setBuildEnv = (buildEnv drv); };
-    })
-
-    (pkgs.rustBuilder.rustLib.makeOverride {
-      name = "garage_api";
-      overrideAttrs = drv: { /* [1] */ setBuildEnv = (buildEnv drv); };
-    })
-
-    (pkgs.rustBuilder.rustLib.makeOverride {
-      name = "garage_web";
-      overrideAttrs = drv: { /* [1] */ setBuildEnv = (buildEnv drv); };
-    })
-
-    (pkgs.rustBuilder.rustLib.makeOverride {
-      name = "k2v-client";
-      overrideAttrs = drv: { /* [1] */ setBuildEnv = (buildEnv drv); };
-    })
-
-    (pkgs.rustBuilder.rustLib.makeOverride {
-      name = "libsodium-sys";
-      overrideArgs = old: {
-        features = [ ]; /* [4] */
-      };
-    })
-
-    (pkgs.rustBuilder.rustLib.makeOverride {
-      name = "zstd-sys";
-      overrideArgs = old: {
-        features = [ ]; /* [4] */
-      };
-    })
-  ];
-
-  /*
-    We ship some parts of the code disabled by default by putting them behind a flag.
-    It speeds up the compilation (when the feature is not required) and released crates have less dependency by default (less attack surface, disk space, etc.).
-    But we want to ship these additional features when we release Garage.
-    In the end, we chose to exclude all features from debug builds while putting (all of) them in the release builds.
+     You can have a complete list of the available options by looking at the overriden object, mkcrate:
+     https://github.com/cargo2nix/cargo2nix/blob/master/overlay/mkcrate.nix
   */
-  rootFeatures = if features != null then features else
-     ([
-       "garage/bundled-libs"
-       "garage/sled"
-       "garage/k2v"
-     ] ++ (if release then [
-       "garage/consul-discovery"
-       "garage/kubernetes-discovery"
-       "garage/metrics"
-       "garage/telemetry-otlp"
-       "garage/lmdb"
-       "garage/sqlite"
-     ] else []));
+  packageOverrides = pkgs:
+    pkgs.rustBuilder.overrides.all ++ [
+      /* [1] We add some logic to compile our crates with clippy, it provides us many additional lints
 
+         [2] We need to alter Nix hardening to make static binaries: PIE,
+         Position Independent Executables seems to be supported only on amd64. Having
+         this flag set either 1. make our executables crash or 2. compile as dynamic on some platforms.
+         Here, we deactivate it. Later (find `codegenOpts`), we reactivate it for supported targets
+         (only amd64 curently) through the `-static-pie` flag.
+         PIE is a feature used by ASLR, which helps mitigate security issues.
+         Learn more about Nix Hardening at: https://github.com/NixOS/nixpkgs/blob/master/pkgs/build-support/cc-wrapper/add-hardening.sh
+
+         [3] We want to inject the git version while keeping the build deterministic.
+         As we do not want to consider the .git folder as part of the input source,
+         we ask the user (the CI often) to pass the value to Nix.
+
+         [4] We don't want libsodium-sys and zstd-sys to try to use pkgconfig to build against a system library.
+         However the features to do so get activated for some reason (due to a bug in cargo2nix?),
+         so disable them manually here.
+      */
+      (pkgs.rustBuilder.rustLib.makeOverride {
+        name = "garage";
+        overrideAttrs = drv:
+          (if git_version != null then {
+            # [3]
+            preConfigure = ''
+              ${drv.preConfigure or ""}
+              export GIT_VERSION="${git_version}"
+            '';
+          } else
+            { }) // {
+              # [1]
+              setBuildEnv = (buildEnv drv);
+              # [2]
+              hardeningDisable = [ "pie" ];
+            };
+      })
+
+      (pkgs.rustBuilder.rustLib.makeOverride {
+        name = "garage_rpc";
+        overrideAttrs = drv: { # [1]
+          setBuildEnv = (buildEnv drv);
+        };
+      })
+
+      (pkgs.rustBuilder.rustLib.makeOverride {
+        name = "garage_db";
+        overrideAttrs = drv: { # [1]
+          setBuildEnv = (buildEnv drv);
+        };
+      })
+
+      (pkgs.rustBuilder.rustLib.makeOverride {
+        name = "garage_util";
+        overrideAttrs = drv: { # [1]
+          setBuildEnv = (buildEnv drv);
+        };
+      })
+
+      (pkgs.rustBuilder.rustLib.makeOverride {
+        name = "garage_table";
+        overrideAttrs = drv: { # [1]
+          setBuildEnv = (buildEnv drv);
+        };
+      })
+
+      (pkgs.rustBuilder.rustLib.makeOverride {
+        name = "garage_block";
+        overrideAttrs = drv: { # [1]
+          setBuildEnv = (buildEnv drv);
+        };
+      })
+
+      (pkgs.rustBuilder.rustLib.makeOverride {
+        name = "garage_model";
+        overrideAttrs = drv: { # [1]
+          setBuildEnv = (buildEnv drv);
+        };
+      })
+
+      (pkgs.rustBuilder.rustLib.makeOverride {
+        name = "garage_api";
+        overrideAttrs = drv: { # [1]
+          setBuildEnv = (buildEnv drv);
+        };
+      })
+
+      (pkgs.rustBuilder.rustLib.makeOverride {
+        name = "garage_web";
+        overrideAttrs = drv: { # [1]
+          setBuildEnv = (buildEnv drv);
+        };
+      })
+
+      (pkgs.rustBuilder.rustLib.makeOverride {
+        name = "k2v-client";
+        overrideAttrs = drv: { # [1]
+          setBuildEnv = (buildEnv drv);
+        };
+      })
+
+      (pkgs.rustBuilder.rustLib.makeOverride {
+        name = "libsodium-sys";
+        overrideArgs = old: {
+          features = [ ]; # [4]
+        };
+      })
+
+      (pkgs.rustBuilder.rustLib.makeOverride {
+        name = "zstd-sys";
+        overrideArgs = old: {
+          features = [ ]; # [4]
+        };
+      })
+    ];
+
+  /* We ship some parts of the code disabled by default by putting them behind a flag.
+     It speeds up the compilation (when the feature is not required) and released crates have less dependency by default (less attack surface, disk space, etc.).
+     But we want to ship these additional features when we release Garage.
+     In the end, we chose to exclude all features from debug builds while putting (all of) them in the release builds.
+  */
+  rootFeatures = if features != null then
+    features
+  else
+    ([ "garage/bundled-libs" "garage/sled" "garage/k2v" ] ++ (if release then [
+      "garage/consul-discovery"
+      "garage/kubernetes-discovery"
+      "garage/metrics"
+      "garage/telemetry-otlp"
+      "garage/lmdb"
+      "garage/sqlite"
+    ] else
+      [ ]));
 
   packageFun = import ../Cargo.nix;
 
-  /*
-    We compile fully static binaries with musl to simplify deployment on most systems.
-    When possible, we reactivate PIE hardening (see above).
+  /* We compile fully static binaries with musl to simplify deployment on most systems.
+     When possible, we reactivate PIE hardening (see above).
 
-    Also, if you set the RUSTFLAGS environment variable, the following parameters will
-    be ignored.
+     Also, if you set the RUSTFLAGS environment variable, the following parameters will
+     be ignored.
 
-    For more information on static builds, please refer to Rust's RFC 1721.
-    https://rust-lang.github.io/rfcs/1721-crt-static.html#specifying-dynamicstatic-c-runtime-linkage
+     For more information on static builds, please refer to Rust's RFC 1721.
+     https://rust-lang.github.io/rfcs/1721-crt-static.html#specifying-dynamicstatic-c-runtime-linkage
   */
 
   codegenOpts = {
-   "armv6l-unknown-linux-musleabihf" = [ "target-feature=+crt-static" "link-arg=-static" ]; /* compile as dynamic with static-pie */
-   "aarch64-unknown-linux-musl" = [ "target-feature=+crt-static" "link-arg=-static" ]; /* segfault with static-pie */
-   "i686-unknown-linux-musl" = [ "target-feature=+crt-static" "link-arg=-static" ]; /* segfault with static-pie */
-   "x86_64-unknown-linux-musl" = [ "target-feature=+crt-static" "link-arg=-static-pie" ];
+    "armv6l-unknown-linux-musleabihf" = [
+      "target-feature=+crt-static"
+      "link-arg=-static"
+    ]; # compile as dynamic with static-pie
+    "aarch64-unknown-linux-musl" = [
+      "target-feature=+crt-static"
+      "link-arg=-static"
+    ]; # segfault with static-pie
+    "i686-unknown-linux-musl" = [
+      "target-feature=+crt-static"
+      "link-arg=-static"
+    ]; # segfault with static-pie
+    "x86_64-unknown-linux-musl" =
+      [ "target-feature=+crt-static" "link-arg=-static-pie" ];
   };
 
-  /*
-    NixOS and Rust/Cargo triples do not match for ARM, fix it here.
-  */
-  rustTarget = if target == "armv6l-unknown-linux-musleabihf"
-    then "arm-unknown-linux-musleabihf"
-    else target;
+  # NixOS and Rust/Cargo triples do not match for ARM, fix it here.
+  rustTarget = if target == "armv6l-unknown-linux-musleabihf" then
+    "arm-unknown-linux-musleabihf"
+  else
+    target;
 
-in
-  pkgs.rustBuilder.makePackageSet ({
-    inherit release packageFun packageOverrides codegenOpts rootFeatures;
-    target = rustTarget;
-  } // toolchainOptions)
+in pkgs.rustBuilder.makePackageSet ({
+  inherit release packageFun packageOverrides codegenOpts rootFeatures;
+  target = rustTarget;
+} // toolchainOptions)

nix/kaniko.nix

@@ -15,7 +15,8 @@ pkgs.buildGoModule rec {
   checkPhase = "true";
 
   meta = with pkgs.lib; {
-    description = "kaniko is a tool to build container images from a Dockerfile, inside a container or Kubernetes cluster.";
+    description =
+      "kaniko is a tool to build container images from a Dockerfile, inside a container or Kubernetes cluster.";
     homepage = "https://github.com/GoogleContainerTools/kaniko";
     license = licenses.asl20;
     platforms = platforms.linux;

nix/manifest-tool.nix

@@ -15,7 +15,8 @@ pkgs.buildGoModule rec {
   checkPhase = "true";
 
   meta = with pkgs.lib; {
-    description = "Command line tool to create and query container image manifest list/indexes";
+    description =
+      "Command line tool to create and query container image manifest list/indexes";
     homepage = "https://github.com/estesp/manifest-tool";
     license = licenses.asl20;
     platforms = platforms.linux;

nix/toolchain.nix

@@ -1,6 +1,4 @@
-{
-  system ? builtins.currentSystem,
-}:
+{ system ? builtins.currentSystem, }:
 
 with import ./common.nix;
 
@@ -11,27 +9,23 @@ let
     #"aarch64-unknown-linux-musl"
     "armv6l-unknown-linux-musleabihf"
   ];
-  pkgsList = builtins.map (target: import pkgsSrc { 
-    inherit system; 
-    crossSystem = {
-      config = target;
-      isStatic = true;
-    };
-    overlays = [ cargo2nixOverlay ];
-  }) platforms;
-  pkgsHost = import pkgsSrc {};
+  pkgsList = builtins.map (target:
+    import pkgsSrc {
+      inherit system;
+      crossSystem = {
+        config = target;
+        isStatic = true;
+      };
+      overlays = [ cargo2nixOverlay ];
+    }) platforms;
+  pkgsHost = import pkgsSrc { };
   lib = pkgsHost.lib;
   kaniko = (import ./kaniko.nix) pkgsHost;
   winscp = (import ./winscp.nix) pkgsHost;
   manifestTool = (import ./manifest-tool.nix) pkgsHost;
-in 
-  lib.flatten (builtins.map (pkgs: [
-     pkgs.rustPlatform.rust.rustc
-     pkgs.rustPlatform.rust.cargo
-     pkgs.buildPackages.stdenv.cc
-  ]) pkgsList) ++ [
-    kaniko
-    winscp
-    manifestTool
-  ]
+in lib.flatten (builtins.map (pkgs: [
+  pkgs.rustPlatform.rust.rustc
+  pkgs.rustPlatform.rust.cargo
+  pkgs.buildPackages.stdenv.cc
+]) pkgsList) ++ [ kaniko winscp manifestTool ]
 

nix/winscp.nix

@@ -11,12 +11,12 @@ pkgs.stdenv.mkDerivation rec {
   };
 
   buildPhase = ''
-    cat > winscp <<EOF
-#!${pkgs.bash}/bin/bash
+        cat > winscp <<EOF
+    #!${pkgs.bash}/bin/bash
 
-WINEDEBUG=-all
-${pkgs.winePackages.minimal}/bin/wine $out/opt/WinSCP.com
-EOF
+    WINEDEBUG=-all
+    ${pkgs.winePackages.minimal}/bin/wine $out/opt/WinSCP.com
+    EOF
   '';
 
   installPhase = ''

shell.nix

@@ -1,6 +1,4 @@
-{
-    system ? builtins.currentSystem,
-}:
+{ system ? builtins.currentSystem, }:
 
 with import ./nix/common.nix;
 
@@ -13,161 +11,152 @@ let
   manifest-tool = (import ./nix/manifest-tool.nix) pkgs;
   winscp = (import ./nix/winscp.nix) pkgs;
 
-in
-  {
-    /* --- Rust Shell ---
-     * Use it to compile Garage
-     */
-    rust = pkgs.mkShell {
-      nativeBuildInputs = [
-        #pkgs.rustPlatform.rust.rustc
-        pkgs.rustPlatform.rust.cargo
-        #pkgs.clippy
-        pkgs.rustfmt
-        #pkgs.perl
-        #pkgs.protobuf
-        #pkgs.pkg-config
-        #pkgs.openssl
-        pkgs.file
-        #cargo2nix.packages.x86_64-linux.cargo2nix
-      ];
-    };
+in {
+  # --- Rust Shell ---
+  # Use it to compile Garage
+  rust = pkgs.mkShell {
+    nativeBuildInputs = [
+      #pkgs.rustPlatform.rust.rustc
+      pkgs.rustPlatform.rust.cargo
+      #pkgs.clippy
+      pkgs.rustfmt
+      #pkgs.perl
+      #pkgs.protobuf
+      #pkgs.pkg-config
+      #pkgs.openssl
+      pkgs.file
+      #cargo2nix.packages.x86_64-linux.cargo2nix
+    ];
+  };
 
-    /* --- Integration shell ---
-     * Use it to test Garage with common S3 clients
-     */
-    integration = pkgs.mkShell {
-      nativeBuildInputs = [
-        winscp
-        pkgs.s3cmd
-        pkgs.awscli2
-        pkgs.minio-client
-        pkgs.rclone
-        pkgs.socat
-        pkgs.psmisc
-        pkgs.which
-        pkgs.openssl
-        pkgs.curl
-        pkgs.jq
-      ];
-    };
+  # --- Integration shell ---
+  # Use it to test Garage with common S3 clients
+  integration = pkgs.mkShell {
+    nativeBuildInputs = [
+      winscp
+      pkgs.s3cmd
+      pkgs.awscli2
+      pkgs.minio-client
+      pkgs.rclone
+      pkgs.socat
+      pkgs.psmisc
+      pkgs.which
+      pkgs.openssl
+      pkgs.curl
+      pkgs.jq
+    ];
+  };
 
-    /* --- Release shell ---
-     * A shell built to make releasing easier
-     */
-    release = pkgs.mkShell {
-      shellHook = ''
-function refresh_toolchain {
-  pass show deuxfleurs/nix_priv_key > /tmp/nix-signing-key.sec
-  nix copy \
-    --to 's3://nix?endpoint=garage.deuxfleurs.fr&region=garage&secret-key=/tmp/nix-signing-key.sec' \
-    $(nix-store -qR \
-      $(nix-build --no-build-output --no-out-link nix/toolchain.nix))
-  rm /tmp/nix-signing-key.sec
+  # --- Release shell ---
+  # A shell built to make releasing easier
+  release = pkgs.mkShell {
+    shellHook = ''
+      function refresh_toolchain {
+        pass show deuxfleurs/nix_priv_key > /tmp/nix-signing-key.sec
+        nix copy \
+          --to 's3://nix?endpoint=garage.deuxfleurs.fr&region=garage&secret-key=/tmp/nix-signing-key.sec' \
+          $(nix-store -qR \
+            $(nix-build --no-build-output --no-out-link nix/toolchain.nix))
+        rm /tmp/nix-signing-key.sec
+      }
+
+      function refresh_cache {
+        pass show deuxfleurs/nix_priv_key > /tmp/nix-signing-key.sec
+        for attr in clippy.amd64 test.amd64 pkgs.{amd64,i386,arm,arm64}.{debug,release}; do
+          echo "Updating cache for ''${attr}"
+          derivation=$(nix-instantiate --attr ''${attr})
+          nix copy -j8 \
+            --to 's3://nix?endpoint=garage.deuxfleurs.fr&region=garage&secret-key=/tmp/nix-signing-key.sec' \
+            $(nix-store -qR ''${derivation%\!bin})
+        done
+        rm /tmp/nix-signing-key.sec
+      }
+
+      function refresh_flake_cache {
+        pass show deuxfleurs/nix_priv_key > /tmp/nix-signing-key.sec
+        for attr in packages.x86_64-linux.default devShell.x86_64-linux; do
+          echo "Updating cache for ''${attr}"
+          derivation=$(nix path-info --derivation ".#''${attr}")
+          nix copy -j8 \
+            --to 's3://nix?endpoint=garage.deuxfleurs.fr&region=garage&secret-key=/tmp/nix-signing-key.sec' \
+            $(nix-store -qR ''${derivation})
+        done
+        rm /tmp/nix-signing-key.sec
+      }
+
+      function to_s3 {
+        aws \
+            --endpoint-url https://garage.deuxfleurs.fr \
+            --region garage \
+          s3 cp \
+            ./result-bin/bin/garage \
+            s3://garagehq.deuxfleurs.fr/_releases/''${DRONE_TAG:-$DRONE_COMMIT}/''${TARGET}/garage
+      }
+
+      function to_docker {
+        executor  \
+          --force \
+          --customPlatform="''${DOCKER_PLATFORM}" \
+          --destination "''${CONTAINER_NAME}:''${CONTAINER_TAG}" \
+          --context dir://`pwd` \
+          --verbosity=debug
+      }
+
+      function multiarch_docker {
+              manifest-tool push from-spec <(cat <<EOF
+      image: dxflrs/garage:''${CONTAINER_TAG}
+      manifests:
+        -
+          image: dxflrs/arm64_garage:''${CONTAINER_TAG}
+          platform:
+            architecture: arm64
+            os: linux
+        -
+          image: dxflrs/amd64_garage:''${CONTAINER_TAG}
+          platform:
+            architecture: amd64
+            os: linux
+        -
+          image: dxflrs/386_garage:''${CONTAINER_TAG}
+          platform:
+            architecture: 386
+            os: linux
+        -
+          image: dxflrs/arm_garage:''${CONTAINER_TAG}
+          platform:
+            architecture: arm
+            os: linux
+      EOF
+              )
+      }
+
+      function refresh_index {
+        aws \
+            --endpoint-url https://garage.deuxfleurs.fr \
+            --region garage \
+          s3 ls \
+            --recursive \
+            s3://garagehq.deuxfleurs.fr/_releases/ \
+        > aws-list.txt
+
+        nix-build nix/build_index.nix
+
+        aws \
+            --endpoint-url https://garage.deuxfleurs.fr \
+            --region garage \
+          s3 cp \
+            result/share/_releases.json \
+            s3://garagehq.deuxfleurs.fr/
+
+        aws \
+            --endpoint-url https://garage.deuxfleurs.fr \
+            --region garage \
+          s3 cp \
+            result/share/_releases.html \
+            s3://garagehq.deuxfleurs.fr/
+      }
+    '';
+    nativeBuildInputs = [ pkgs.awscli2 kaniko manifest-tool ];
+  };
 }
 
-function refresh_cache {
-  pass show deuxfleurs/nix_priv_key > /tmp/nix-signing-key.sec
-  for attr in clippy.amd64 test.amd64 pkgs.{amd64,i386,arm,arm64}.{debug,release}; do
-    echo "Updating cache for ''${attr}"
-    derivation=$(nix-instantiate --attr ''${attr})
-    nix copy -j8 \
-      --to 's3://nix?endpoint=garage.deuxfleurs.fr&region=garage&secret-key=/tmp/nix-signing-key.sec' \
-      $(nix-store -qR ''${derivation%\!bin})
-  done
-  rm /tmp/nix-signing-key.sec
-}
-
-function refresh_flake_cache {
-  pass show deuxfleurs/nix_priv_key > /tmp/nix-signing-key.sec
-  for attr in packages.x86_64-linux.default; do
-    echo "Updating cache for ''${attr}"
-    derivation=$(nix path-info --derivation ".#''${attr}")
-    nix copy -j8 \
-      --to 's3://nix?endpoint=garage.deuxfleurs.fr&region=garage&secret-key=/tmp/nix-signing-key.sec' \
-      $(nix-store -qR ''${derivation})
-  done
-  rm /tmp/nix-signing-key.sec
-}
-
-function to_s3 {
-  aws \
-      --endpoint-url https://garage.deuxfleurs.fr \
-      --region garage \
-    s3 cp \
-      ./result-bin/bin/garage \
-      s3://garagehq.deuxfleurs.fr/_releases/''${DRONE_TAG:-$DRONE_COMMIT}/''${TARGET}/garage
-}
-
-function to_docker {
-  executor  \
-    --force \
-    --customPlatform="''${DOCKER_PLATFORM}" \
-    --destination "''${CONTAINER_NAME}:''${CONTAINER_TAG}" \
-    --context dir://`pwd` \
-    --verbosity=debug
-}
-
-function multiarch_docker {
-        manifest-tool push from-spec <(cat <<EOF
-image: dxflrs/garage:''${CONTAINER_TAG}
-manifests:
-  -
-    image: dxflrs/arm64_garage:''${CONTAINER_TAG}
-    platform:
-      architecture: arm64
-      os: linux
-  -
-    image: dxflrs/amd64_garage:''${CONTAINER_TAG}
-    platform:
-      architecture: amd64
-      os: linux
-  -
-    image: dxflrs/386_garage:''${CONTAINER_TAG}
-    platform:
-      architecture: 386
-      os: linux
-  -
-    image: dxflrs/arm_garage:''${CONTAINER_TAG}
-    platform:
-      architecture: arm
-      os: linux
-EOF
-        )
-}
-
-function refresh_index {
-  aws \
-      --endpoint-url https://garage.deuxfleurs.fr \
-      --region garage \
-    s3 ls \
-      --recursive \
-      s3://garagehq.deuxfleurs.fr/_releases/ \
-  > aws-list.txt
-
-  nix-build nix/build_index.nix
-
-  aws \
-      --endpoint-url https://garage.deuxfleurs.fr \
-      --region garage \
-    s3 cp \
-      result/share/_releases.json \
-      s3://garagehq.deuxfleurs.fr/
-
-  aws \
-      --endpoint-url https://garage.deuxfleurs.fr \
-      --region garage \
-    s3 cp \
-      result/share/_releases.html \
-      s3://garagehq.deuxfleurs.fr/
-}
-        '';
-      nativeBuildInputs = [
-        pkgs.awscli2
-        kaniko 
-        manifest-tool
-      ];
-    };
-  }
-
-

src/api/Cargo.toml

@@ -21,28 +21,28 @@ garage_util = { version = "0.8.1", path = "../util" }
 garage_rpc = { version = "0.8.1", path = "../rpc" }
 
 async-trait = "0.1.7"
-base64 = "0.13"
+base64 = "0.21"
 bytes = "1.0"
 chrono = "0.4"
 crypto-common = "0.1"
 err-derive = "0.3"
 hex = "0.4"
 hmac = "0.12"
-idna = "0.2"
-tracing = "0.1.30"
+idna = "0.3"
+tracing = "0.1"
 md-5 = "0.10"
 nom = "7.1"
 sha2 = "0.10"
 
 futures = "0.3"
 futures-util = "0.3"
-pin-project = "1.0.11"
+pin-project = "1.0.12"
 tokio = { version = "1.0", default-features = false, features = ["rt", "rt-multi-thread", "io-util", "net", "time", "macros", "sync", "signal", "fs"] }
 tokio-stream = "0.1"
 
 form_urlencoded = "1.0.0"
 http = "0.2"
-httpdate = "0.3"
+httpdate = "1.0"
 http-range = "0.1"
 hyper = { version = "0.14", features = ["server", "http1", "runtime", "tcp", "stream"] }
 multer = "2.0"
@@ -52,7 +52,7 @@ serde = { version = "1.0", features = ["derive"] }
 serde_bytes = "0.11"
 serde_json = "1.0"
 quick-xml = { version = "0.21", features = [ "serialize" ] }
-url = "2.1"
+url = "2.3"
 
 opentelemetry = "0.17"
 opentelemetry-prometheus = { version = "0.10", optional = true }

src/api/admin/api_server.rs

@@ -77,6 +77,53 @@ impl AdminApiServer {
 			.body(Body::empty())?)
 	}
 
+	async fn handle_check_website_enabled(
+		&self,
+		req: Request<Body>,
+	) -> Result<Response<Body>, Error> {
+		let has_domain_header = req.headers().contains_key("domain");
+
+		if !has_domain_header {
+			return Err(Error::bad_request("No domain header found"));
+		}
+
+		let domain = &req
+			.headers()
+			.get("domain")
+			.ok_or_internal_error("Could not parse domain header")?;
+
+		let domain_string = String::from(
+			domain
+				.to_str()
+				.ok_or_bad_request("Invalid characters found in domain header")?,
+		);
+
+		let bucket_id = self
+			.garage
+			.bucket_helper()
+			.resolve_global_bucket_name(&domain_string)
+			.await?
+			.ok_or_else(|| HelperError::NoSuchBucket(domain_string))?;
+
+		let bucket = self
+			.garage
+			.bucket_helper()
+			.get_existing_bucket(bucket_id)
+			.await?;
+
+		let bucket_state = bucket.state.as_option().unwrap();
+		let bucket_website_config = bucket_state.website_config.get();
+
+		match bucket_website_config {
+			Some(_v) => Ok(Response::builder()
+				.status(StatusCode::OK)
+				.body(Body::from("Bucket authorized for website hosting"))?),
+			None => Err(Error::bad_request(
+				"Bucket is not authorized for website hosting",
+			)),
+		}
+	}
+
 	fn handle_health(&self) -> Result<Response<Body>, Error> {
 		let health = self.garage.system.health();
 
@@ -174,6 +221,7 @@ impl ApiHandler for AdminApiServer {
 
 		match endpoint {
 			Endpoint::Options => self.handle_options(&req),
+			Endpoint::CheckWebsiteEnabled => self.handle_check_website_enabled(req).await,
 			Endpoint::Health => self.handle_health(),
 			Endpoint::Metrics => self.handle_metrics(),
 			Endpoint::GetClusterStatus => handle_get_cluster_status(&self.garage).await,

src/api/admin/router.rs

@@ -17,6 +17,7 @@ router_match! {@func
 #[derive(Debug, Clone, PartialEq, Eq)]
 pub enum Endpoint {
 	Options,
+	CheckWebsiteEnabled,
 	Health,
 	Metrics,
 	GetClusterStatus,
@@ -91,6 +92,7 @@ impl Endpoint {
 
 		let res = router_match!(@gen_path_parser (req.method(), path, query) [
 			OPTIONS _ => Options,
+			GET "/check" => CheckWebsiteEnabled,
 			GET "/health" => Health,
 			GET "/metrics" => Metrics,
 			GET "/v0/status" => GetClusterStatus,
@@ -136,6 +138,7 @@ impl Endpoint {
 	pub fn authorization_type(&self) -> Authorization {
 		match self {
 			Self::Health => Authorization::None,
+			Self::CheckWebsiteEnabled => Authorization::None,
 			Self::Metrics => Authorization::MetricsToken,
 			_ => Authorization::AdminToken,
 		}

src/api/k2v/batch.rs

@@ -1,5 +1,6 @@
 use std::sync::Arc;
 
+use base64::prelude::*;
 use hyper::{Body, Request, Response, StatusCode};
 use serde::{Deserialize, Serialize};
 
@@ -26,9 +27,11 @@ pub async fn handle_insert_batch(
 	for it in items {
 		let ct = it.ct.map(|s| CausalContext::parse_helper(&s)).transpose()?;
 		let v = match it.v {
-			Some(vs) => {
-				DvvsValue::Value(base64::decode(vs).ok_or_bad_request("Invalid base64 value")?)
-			}
+			Some(vs) => DvvsValue::Value(
+				BASE64_STANDARD
+					.decode(vs)
+					.ok_or_bad_request("Invalid base64 value")?,
+			),
 			None => DvvsValue::Deleted,
 		};
 		items2.push((it.pk, it.sk, ct, v));
@@ -358,7 +361,7 @@ impl ReadBatchResponseItem {
 			.values()
 			.iter()
 			.map(|v| match v {
-				DvvsValue::Value(x) => Some(base64::encode(x)),
+				DvvsValue::Value(x) => Some(BASE64_STANDARD.encode(x)),
 				DvvsValue::Deleted => None,
 			})
 			.collect::<Vec<_>>();

src/api/k2v/item.rs

@@ -1,5 +1,6 @@
 use std::sync::Arc;
 
+use base64::prelude::*;
 use http::header;
 
 use hyper::{Body, Request, Response, StatusCode};
@@ -81,7 +82,7 @@ impl ReturnFormat {
 			.iter()
 			.map(|v| match v {
 				DvvsValue::Deleted => serde_json::Value::Null,
-				DvvsValue::Value(v) => serde_json::Value::String(base64::encode(v)),
+				DvvsValue::Value(v) => serde_json::Value::String(BASE64_STANDARD.encode(v)),
 			})
 			.collect::<Vec<_>>();
 		let json_body =

src/api/s3/list.rs

@@ -3,6 +3,7 @@ use std::collections::{BTreeMap, BTreeSet};
 use std::iter::{Iterator, Peekable};
 use std::sync::Arc;
 
+use base64::prelude::*;
 use hyper::{Body, Response};
 
 use garage_util::data::*;
@@ -129,11 +130,11 @@ pub async fn handle_list(
 		next_continuation_token: match (query.is_v2, &pagination) {
 			(true, Some(RangeBegin::AfterKey { key })) => Some(s3_xml::Value(format!(
 				"]{}",
-				base64::encode(key.as_bytes())
+				BASE64_STANDARD.encode(key.as_bytes())
 			))),
 			(true, Some(RangeBegin::IncludingKey { key, .. })) => Some(s3_xml::Value(format!(
 				"[{}",
-				base64::encode(key.as_bytes())
+				BASE64_STANDARD.encode(key.as_bytes())
 			))),
 			_ => None,
 		},
@@ -583,14 +584,16 @@ impl ListObjectsQuery {
 				(Some(token), _) => match &token[..1] {
 					"[" => Ok(RangeBegin::IncludingKey {
 						key: String::from_utf8(
-							base64::decode(token[1..].as_bytes())
+							BASE64_STANDARD
+								.decode(token[1..].as_bytes())
 								.ok_or_bad_request("Invalid continuation token")?,
 						)?,
 						fallback_key: None,
 					}),
 					"]" => Ok(RangeBegin::AfterKey {
 						key: String::from_utf8(
-							base64::decode(token[1..].as_bytes())
+							BASE64_STANDARD
+								.decode(token[1..].as_bytes())
 								.ok_or_bad_request("Invalid continuation token")?,
 						)?,
 					}),

src/api/s3/post_object.rs

@@ -4,6 +4,7 @@ use std::ops::RangeInclusive;
 use std::sync::Arc;
 use std::task::{Context, Poll};
 
+use base64::prelude::*;
 use bytes::Bytes;
 use chrono::{DateTime, Duration, Utc};
 use futures::{Stream, StreamExt};
@@ -138,7 +139,9 @@ pub async fn handle_post_object(
 		.get_existing_bucket(bucket_id)
 		.await?;
 
-	let decoded_policy = base64::decode(&policy).ok_or_bad_request("Invalid policy")?;
+	let decoded_policy = BASE64_STANDARD
+		.decode(&policy)
+		.ok_or_bad_request("Invalid policy")?;
 	let decoded_policy: Policy =
 		serde_json::from_slice(&decoded_policy).ok_or_bad_request("Invalid policy")?;
 

src/api/s3/put.rs

@@ -1,6 +1,7 @@
 use std::collections::{BTreeMap, BTreeSet, HashMap};
 use std::sync::Arc;
 
+use base64::prelude::*;
 use futures::prelude::*;
 use hyper::body::{Body, Bytes};
 use hyper::header::{HeaderMap, HeaderValue};
@@ -207,7 +208,7 @@ fn ensure_checksum_matches(
 		}
 	}
 	if let Some(expected_md5) = content_md5 {
-		if expected_md5.trim_matches('"') != base64::encode(data_md5sum) {
+		if expected_md5.trim_matches('"') != BASE64_STANDARD.encode(data_md5sum) {
 			return Err(Error::bad_request("Unable to validate content-md5"));
 		} else {
 			trace!("Successfully validated content-md5");

src/block/Cargo.toml

@@ -25,11 +25,11 @@ arc-swap = "1.5"
 async-trait = "0.1.7"
 bytes = "1.0"
 hex = "0.4"
-tracing = "0.1.30"
+tracing = "0.1"
 rand = "0.8"
 
 async-compression = { version = "0.3", features = ["tokio", "zstd"] }
-zstd = { version = "0.9", default-features = false }
+zstd = { version = "0.12", default-features = false }
 
 serde = { version = "1.0", default-features = false, features = ["derive", "rc"] }
 serde_bytes = "0.11"

src/db/Cargo.toml

@@ -19,18 +19,18 @@ required-features = ["cli"]
 [dependencies]
 err-derive = "0.3"
 hexdump = "0.1"
-tracing = "0.1.30"
+tracing = "0.1"
 
 heed = { version = "0.11", default-features = false, features = ["lmdb"], optional = true }
-rusqlite = { version = "0.27", optional = true }
+rusqlite = { version = "0.28", optional = true }
 sled = { version = "0.34", optional = true }
 
 # cli deps
-clap = { version = "3.1.18", optional = true, features = ["derive", "env"] }
+clap = { version = "4.1", optional = true, features = ["derive", "env"] }
 pretty_env_logger = { version = "0.4", optional = true }
 
 [dev-dependencies]
-mktemp = "0.4"
+mktemp = "0.5"
 
 [features]
 default = [ "sled" ]

src/garage/Cargo.toml

@@ -33,10 +33,10 @@ garage_web = { version = "0.8.1", path = "../web" }
 backtrace = "0.3"
 bytes = "1.0"
 bytesize = "1.1"
-timeago = "0.3"
+timeago = "0.4"
 parse_duration = "2.1"
 hex = "0.4"
-tracing = { version = "0.1.30" }
+tracing = { version = "0.1" }
 tracing-subscriber = { version = "0.3", features = ["env-filter"] }
 rand = "0.8"
 async-trait = "0.1.7"
@@ -45,7 +45,7 @@ sodiumoxide = { version = "0.2.5-0", package = "kuska-sodiumoxide" }
 serde = { version = "1.0", default-features = false, features = ["derive", "rc"] }
 serde_bytes = "0.11"
 structopt = { version = "0.3", default-features = false }
-toml = "0.5"
+toml = "0.6"
 
 futures = "0.3"
 futures-util = "0.3"
@@ -69,7 +69,7 @@ sha2 = "0.10"
 static_init = "1.0"
 assert-json-diff = "2.0"
 serde_json = "1.0"
-base64 = "0.13"
+base64 = "0.21"
 
 
 [features]

src/garage/admin.rs

@@ -15,6 +15,7 @@ use garage_util::time::*;
 use garage_table::replication::*;
 use garage_table::*;
 
+use garage_rpc::ring::PARTITION_BITS;
 use garage_rpc::*;
 
 use garage_block::manager::BlockResyncErrorInfo;
@@ -783,6 +784,7 @@ impl AdminRpcHandler {
 			for node in ring.layout.node_ids().iter() {
 				let mut opt = opt.clone();
 				opt.all_nodes = false;
+				opt.skip_global = true;
 
 				writeln!(&mut ret, "\n======================").unwrap();
 				writeln!(&mut ret, "Stats for node {:?}:", node).unwrap();
@@ -799,6 +801,15 @@ impl AdminRpcHandler {
 					Err(e) => writeln!(&mut ret, "Network error: {}", e).unwrap(),
 				}
 			}
+
+			writeln!(&mut ret, "\n======================").unwrap();
+			write!(
+				&mut ret,
+				"Cluster statistics:\n\n{}",
+				self.gather_cluster_stats()
+			)
+			.unwrap();
+
 			Ok(AdminRpc::Ok(ret))
 		} else {
 			Ok(AdminRpc::Ok(self.gather_stats_local(opt)?))
@@ -819,22 +830,6 @@ impl AdminRpcHandler {
 
 		writeln!(&mut ret, "\nDatabase engine: {}", self.garage.db.engine()).unwrap();
 
-		// Gather ring statistics
-		let ring = self.garage.system.ring.borrow().clone();
-		let mut ring_nodes = HashMap::new();
-		for (_i, loc) in ring.partitions().iter() {
-			for n in ring.get_nodes(loc, ring.replication_factor).iter() {
-				if !ring_nodes.contains_key(n) {
-					ring_nodes.insert(*n, 0usize);
-				}
-				*ring_nodes.get_mut(n).unwrap() += 1;
-			}
-		}
-		writeln!(&mut ret, "\nRing nodes & partition count:").unwrap();
-		for (n, c) in ring_nodes.iter() {
-			writeln!(&mut ret, "  {:?} {}", n, c).unwrap();
-		}
-
 		// Gather table statistics
 		let mut table = vec!["  Table\tItems\tMklItems\tMklTodo\tGcTodo".into()];
 		table.push(self.gather_table_stats(&self.garage.bucket_table, opt.detailed)?);
@@ -881,12 +876,108 @@ impl AdminRpcHandler {
 		.unwrap();
 
 		if !opt.detailed {
-			writeln!(&mut ret, "\nIf values are missing (marked as NC), consider adding the --detailed flag - this will be slow.").unwrap();
+			writeln!(&mut ret, "\nIf values are missing above (marked as NC), consider adding the --detailed flag (this will be slow).").unwrap();
+		}
+
+		if !opt.skip_global {
+			write!(&mut ret, "\n{}", self.gather_cluster_stats()).unwrap();
 		}
 
 		Ok(ret)
 	}
 
+	fn gather_cluster_stats(&self) -> String {
+		let mut ret = String::new();
+
+		// Gather storage node and free space statistics
+		let layout = &self.garage.system.ring.borrow().layout;
+		let mut node_partition_count = HashMap::<Uuid, u64>::new();
+		for short_id in layout.ring_assignation_data.iter() {
+			let id = layout.node_id_vec[*short_id as usize];
+			*node_partition_count.entry(id).or_default() += 1;
+		}
+		let node_info = self
+			.garage
+			.system
+			.get_known_nodes()
+			.into_iter()
+			.map(|n| (n.id, n))
+			.collect::<HashMap<_, _>>();
+
+		let mut table = vec!["  ID\tHostname\tZone\tCapacity\tPart.\tDataAvail\tMetaAvail".into()];
+		for (id, parts) in node_partition_count.iter() {
+			let info = node_info.get(id);
+			let status = info.map(|x| &x.status);
+			let role = layout.roles.get(id).and_then(|x| x.0.as_ref());
+			let hostname = status.map(|x| x.hostname.as_str()).unwrap_or("?");
+			let zone = role.map(|x| x.zone.as_str()).unwrap_or("?");
+			let capacity = role.map(|x| x.capacity_string()).unwrap_or("?".into());
+			let avail_str = |x| match x {
+				Some((avail, total)) => {
+					let pct = (avail as f64) / (total as f64) * 100.;
+					let avail = bytesize::ByteSize::b(avail);
+					let total = bytesize::ByteSize::b(total);
+					format!("{}/{} ({:.1}%)", avail, total, pct)
+				}
+				None => "?".into(),
+			};
+			let data_avail = avail_str(status.and_then(|x| x.data_disk_avail));
+			let meta_avail = avail_str(status.and_then(|x| x.meta_disk_avail));
+			table.push(format!(
+				"  {:?}\t{}\t{}\t{}\t{}\t{}\t{}",
+				id, hostname, zone, capacity, parts, data_avail, meta_avail
+			));
+		}
+		write!(
+			&mut ret,
+			"Storage nodes:\n{}",
+			format_table_to_string(table)
+		)
+		.unwrap();
+
+		let meta_part_avail = node_partition_count
+			.iter()
+			.filter_map(|(id, parts)| {
+				node_info
+					.get(id)
+					.and_then(|x| x.status.meta_disk_avail)
+					.map(|c| c.0 / *parts)
+			})
+			.collect::<Vec<_>>();
+		let data_part_avail = node_partition_count
+			.iter()
+			.filter_map(|(id, parts)| {
+				node_info
+					.get(id)
+					.and_then(|x| x.status.data_disk_avail)
+					.map(|c| c.0 / *parts)
+			})
+			.collect::<Vec<_>>();
+		if !meta_part_avail.is_empty() && !data_part_avail.is_empty() {
+			let meta_avail =
+				bytesize::ByteSize(meta_part_avail.iter().min().unwrap() * (1 << PARTITION_BITS));
+			let data_avail =
+				bytesize::ByteSize(data_part_avail.iter().min().unwrap() * (1 << PARTITION_BITS));
+			writeln!(
+				&mut ret,
+				"\nEstimated available storage space cluster-wide (might be lower in practice):"
+			)
+			.unwrap();
+			if meta_part_avail.len() < node_partition_count.len()
+				|| data_part_avail.len() < node_partition_count.len()
+			{
+				writeln!(&mut ret, "  data: < {}", data_avail).unwrap();
+				writeln!(&mut ret, "  metadata: < {}", meta_avail).unwrap();
+				writeln!(&mut ret, "A precise estimate could not be given as information is missing for some storage nodes.").unwrap();
+			} else {
+				writeln!(&mut ret, "  data: {}", data_avail).unwrap();
+				writeln!(&mut ret, "  metadata: {}", meta_avail).unwrap();
+			}
+		}
+
+		ret
+	}
+
 	fn gather_table_stats<F, R>(
 		&self,
 		t: &Arc<Table<F, R>>,

src/garage/cli/cmd.rs

@@ -59,18 +59,29 @@ pub async fn cmd_status(rpc_cli: &Endpoint<SystemRpc, ()>, rpc_host: NodeID) ->
 	let layout = fetch_layout(rpc_cli, rpc_host).await?;
 
 	println!("==== HEALTHY NODES ====");
-	let mut healthy_nodes = vec!["ID\tHostname\tAddress\tTags\tZone\tCapacity".to_string()];
+	let mut healthy_nodes =
+		vec!["ID\tHostname\tAddress\tTags\tZone\tCapacity\tDataAvail\tMetaAvail".to_string()];
 	for adv in status.iter().filter(|adv| adv.is_up) {
 		match layout.roles.get(&adv.id) {
 			Some(NodeRoleV(Some(cfg))) => {
+				let data_avail = match &adv.status.data_disk_avail {
+					_ if cfg.capacity.is_none() => "N/A".into(),
+					Some((avail, total)) => {
+						let pct = (*avail as f64) / (*total as f64) * 100.;
+						let avail = bytesize::ByteSize::b(*avail);
+						format!("{} ({:.1}%)", avail, pct)
+					}
+					None => "?".into(),
+				};
 				healthy_nodes.push(format!(
-					"{id:?}\t{host}\t{addr}\t[{tags}]\t{zone}\t{capacity}",
+					"{id:?}\t{host}\t{addr}\t[{tags}]\t{zone}\t{capacity}\t{data_avail}",
 					id = adv.id,
 					host = adv.status.hostname,
 					addr = adv.addr,
 					tags = cfg.tags.join(","),
 					zone = cfg.zone,
 					capacity = cfg.capacity_string(),
+					data_avail = data_avail,
 				));
 			}
 			_ => {