Merge pull request 'Documentation changes for v0.8' (#394) from doc-0.8 into main

Reviewed-on: #394

doc/book/cookbook/real-world.md

@@ -51,15 +51,15 @@ to store 2 TB of data in total.
 
 ## Get a Docker image
 
-Our docker image is currently named `dxflrs/amd64_garage` and is stored on the [Docker Hub](https://hub.docker.com/r/dxflrs/amd64_garage/tags?page=1&ordering=last_updated).
-We encourage you to use a fixed tag (eg. `v0.4.0`) and not the `latest` tag.
-For this example, we will use the latest published version at the time of the writing which is `v0.4.0` but it's up to you
-to check [the most recent versions on the Docker Hub](https://hub.docker.com/r/dxflrs/amd64_garage/tags?page=1&ordering=last_updated).
+Our docker image is currently named `dxflrs/garage` and is stored on the [Docker Hub](https://hub.docker.com/r/dxflrs/garage/tags?page=1&ordering=last_updated).
+We encourage you to use a fixed tag (eg. `v0.8.0`) and not the `latest` tag.
+For this example, we will use the latest published version at the time of the writing which is `v0.8.0` but it's up to you
+to check [the most recent versions on the Docker Hub](https://hub.docker.com/r/dxflrs/garage/tags?page=1&ordering=last_updated).
 
 For example:
 
 ```
-sudo docker pull dxflrs/amd64_garage:v0.4.0
+sudo docker pull dxflrs/garage:v0.8.0
 ```
 
 ## Deploying and configuring Garage
@@ -125,7 +125,7 @@ docker run \
   -v /etc/garage.toml:/etc/garage.toml \
   -v /var/lib/garage/meta:/var/lib/garage/meta \
   -v /var/lib/garage/data:/var/lib/garage/data \
-  lxpz/garage_amd64:v0.4.0
+  dxflrs/garage:v0.8.0
 ```
 
 It should be restarted automatically at each reboot.

doc/book/working-documents/migration-07.md

@@ -16,7 +16,7 @@ The migration steps are as follows:
 1. Do `garage repair --all-nodes --yes tables` and `garage repair --all-nodes --yes blocks`,
    check the logs and check that all data seems to be synced correctly between
    nodes. If you have time, do additional checks (`scrub`, `block_refs`, etc.)
-2. Disable api and web access. Garage does not support disabling
+2. Disable API and web access. Garage does not support disabling
    these endpoints but you can change the port number or stop your reverse
    proxy for instance.
 3. Check once again that your cluster is healty. Run again `garage repair --all-nodes --yes tables` which is quick.

doc/book/working-documents/migration-08.md

@@ -0,0 +1,34 @@
++++
+title = "Migrating from 0.7 to 0.8"
+weight = 13
++++
+
+**This guide explains how to migrate to 0.8 if you have an existing 0.7 cluster.
+We don't recommend trying to migrate to 0.8 directly from 0.6 or older.**
+
+**We make no guarantee that this migration will work perfectly:
+back up all your data before attempting it!**
+
+Garage v0.8 introduces new data tables that allow the counting of objects in buckets in order to implement bucket quotas.
+A manual migration step is required to first count objects in Garage buckets and populate these tables with accurate data.
+
+The migration steps are as follows:
+
+1. Disable API and web access. Garage v0.7 does not support disabling
+   these endpoints but you can change the port number or stop your reverse proxy for instance.
+2. Do `garage repair --all-nodes --yes tables` and `garage repair --all-nodes --yes blocks`,
+   check the logs and check that all data seems to be synced correctly between
+   nodes. If you have time, do additional checks (`scrub`, `block_refs`, etc.)
+3. Check that queues are empty: run `garage stats` to query them or inspect metrics in the Grafana dashboard.
+4. Turn off Garage v0.7
+5. **Backup the metadata folder of all your nodes!** For instance, use the following command
+	if your metadata directory is `/var/lib/garage/meta`: `cd /var/lib/garage ; tar -acf meta-v0.7.tar.zst meta/`
+6. Install Garage v0.8
+7. **Before starting Garage v0.8**, run the offline migration step: `garage offline-repair --yes object_counters`.
+   This can take a while to run, depending on the number of objects stored in your cluster.
+8. Turn on Garage v0.8
+9. Do `garage repair --all-nodes --yes tables` and `garage repair --all-nodes --yes blocks`.
+   Wait for a full table sync to run.
+10. Your upgraded cluster should be in a working state. Re-enable API and Web
+    access and check that everything went well.
+11. Monitor your cluster in the next hours to see if it works well under your production load, report any issue.