Add Drone CI server with sqlite-on-s3 thing

app/drone-ci/config/litestream.yml

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+dbs:
+  - path: /ephemeral/drone.db
+    replicas:
+      - url: s3://{{ key "secrets/drone-ci/s3_db_bucket" | trimSpace }}/drone.db
+        region: garage
+        endpoint: https://garage.deuxfleurs.fr
+        access-key-id: {{ key "secrets/drone-ci/s3_ak" | trimSpace }}
+        secret-access-key:  {{ key "secrets/drone-ci/s3_sk" | trimSpace }}
+        force-path-style: true
+        sync-interval: 60s

app/drone-ci/deploy/server.hcl

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+job "drone-ci" {
+  datacenters = ["neptune"]
+  type = "service"
+
+  group "server" {
+    count = 1
+
+    network {
+      port "web_port" {
+        to = 80
+      }
+    }
+
+    task "restore-db" {
+      lifecycle {
+        hook = "prestart"
+        sidecar = false
+      }
+
+      driver = "docker"
+      config {
+        image = "litestream/litestream:0.3.9"
+        args = [
+          "restore", "-config", "/etc/litestream.yml", "/ephemeral/drone.db"
+        ]
+        volumes = [
+          "../alloc/data:/ephemeral",
+          "secrets/litestream.yml:/etc/litestream.yml"
+        ]
+      }
+
+      template {
+        data = file("../config/litestream.yml")
+        destination = "secrets/litestream.yml"
+      }
+
+      resources {
+        memory = 200
+        cpu = 1000
+      }
+    }
+
+    task "drone_server" {
+      driver = "docker"
+      config {
+        image = "drone/drone:2.12.0"
+        ports = [ "web_port" ]
+
+        volumes = [
+          "../alloc/data:/ephemeral",
+        ]
+      }
+
+      template {
+        data = <<EOH
+DRONE_GITEA_SERVER=https://git.deuxfleurs.fr
+DRONE_GITEA_CLIENT_ID={{ key "secrets/drone-ci/oauth_client_id" }}
+DRONE_GITEA_CLIENT_SECRET={{ key "secrets/drone-ci/oauth_client_secret" }}
+DRONE_RPC_SECRET={{ key "secrets/drone-ci/rpc_secret" }}
+DRONE_SERVER_HOST=drone.deuxfleurs.fr
+DRONE_SERVER_PROTO=https
+DRONE_DATABASE_SECRET={{ key "secrets/drone-ci/db_enc_secret" }}
+DRONE_COOKIE_SECRET={{ key "secrets/drone-ci/cookie_secret" }}
+AWS_ACCESS_KEY_ID={{ key "secrets/drone-ci/s3_ak" }}
+AWS_SECRET_ACCESS_KEY={{ key "secrets/drone-ci/s3_sk" }}
+AWS_DEFAULT_REGION=garage
+AWS_REGION=garage
+DRONE_S3_BUCKET={{ key "secrets/drone-ci/s3_storage_bucket" }}
+DRONE_S3_ENDPOINT=https://garage.deuxfleurs.fr
+DRONE_S3_PATH_STYLE=true
+DRONE_DATABASE_DRIVER=sqlite3
+DRONE_DATABASE_DATASOURCE=/ephemeral/drone.db
+DRONE_USER_CREATE=username:lx-admin,admin:true
+__DRONE_REGISTRATION_CLOSED=true
+DRONE_LOGS_TEXT=true
+DRONE_LOGS_PRETTY=true
+DRONE_LOGS_DEBUG=true
+DOCKER_API_VERSION=1.39
+EOH
+        destination = "secrets/env"
+        env = true
+      }
+
+      resources {
+        cpu = 100
+        memory = 100
+      }
+
+      service {
+        name = "drone"
+        tags = [
+          "drone",
+          "tricot drone.deuxfleurs.fr",
+        ]
+        port = "web_port"
+        address_mode = "host"
+        check {
+          type = "http"
+          protocol = "http"
+          port = "web_port"
+          path = "/"
+          interval = "60s"
+          timeout = "5s"
+          check_restart {
+            limit = 3
+            grace = "600s"
+            ignore_warnings = false
+          }
+        }
+      }
+    }
+
+    task "replicate-db" {
+      driver = "docker"
+      config {
+        image = "litestream/litestream:0.3.9"
+        entrypoint = [ "/bin/sh" ]
+        args = [
+          "-c",
+          "echo sleeping; sleep 60; echo launching; litestream replicate -config /etc/litestream.yml"
+        ]
+        volumes = [
+          "../alloc/data:/ephemeral",
+          "secrets/litestream.yml:/etc/litestream.yml"
+        ]
+      }
+
+      template {
+        data = file("../config/litestream.yml")
+        destination = "secrets/litestream.yml"
+      }
+
+      resources {
+        memory = 250
+        cpu = 100
+      }
+    }
+  }
+}

app/drone-ci/integration/README.md

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+## Install Debian
+
+We recommend Debian Bullseye
+
+## Install Docker CE from docker.io
+
+Do not use the docker engine shipped by Debian
+
+Doc:
+
+  - https://docs.docker.com/engine/install/debian/
+  - https://docs.docker.com/compose/install/
+
+On a fresh install, as root:
+
+```bash
+apt-get remove -y docker docker-engine docker.io containerd runc
+apt-get update
+apt-get install apt-transport-https ca-certificates curl gnupg lsb-release
+curl -fsSL https://download.docker.com/linux/debian/gpg | sudo gpg --dearmor -o /usr/share/keyrings/docker-archive-keyring.gpg
+ echo "deb [arch=$(dpkg --print-architecture) signed-by=/usr/share/keyrings/docker-archive-keyring.gpg] https://download.docker.com/linux/debian $(lsb_release -cs) stable" | tee /etc/apt/sources.list.d/docker.list > /dev/null
+apt-get update
+apt-get install -y docker-ce docker-ce-cli containerd.io
+
+curl -L "https://github.com/docker/compose/releases/download/1.29.2/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose
+chmod +x /usr/local/bin/docker-compose
+```
+
+## Prepare the runner
+
+Nix folder must be populated before launching any build.
+
+```bash
+docker run --rm -it -v /var/lib/drone/nix:/mnt nixpkgs/nix:nixos-21.05 cp -r /nix/{store,var} /mnt/
+```
+
+This folder will grow over time and might need to be garbage collected.
+As a rule of thumb, after running a full release of Garage, this folder will require 10GB.
+Consider provisioning it with at least 20GB.
+
+## Launch the runner
+
+Because we use a shared nix folder, we set the number of concurrent builds to 1.
+For more details and customizations, see `docker-compose.yml`.
+
+```bash
+DRONE_NAME=lheureduthe DRONE_OWNER=quentin DRONE_SECRET=xxx docker-compose up -d
+```
+
+That's all folks.
+
+## Check if a given job is built by your runner
+
+```bash
+export URL=https://drone.deuxfleurs.fr
+export REPO=Deuxfleurs/garage
+export BUILD=1312
+curl ${URL}/api/repos/${REPO}/builds/${BUILD} \
+  | jq -c '[.stages[] | { name: .name, machine: .machine }]'
+```
+
+It will give you the following result:
+
+```json
+[{"name":"default","machine":"1686a"},{"name":"release-linux-x86_64","machine":"vimaire"},{"name":"release-linux-i686","machine":"carcajou"},{"name":"release-linux-aarch64","machine":"caribou"},{"name":"release-linux-armv6l","machine":"cariacou"},{"name":"refresh-release-page","machine":null}]
+```
+
+## Random note
+
+This setup is done mainly to allow nix builds with some cache.
+To use the cache in Drone, you must set your repository as trusted.
+The command line tool does not work (it says it successfully set your repository as trusted but it did nothing):
+the only way to set your repository as trusted is to connect on the DB and set the `repo_trusted` field of your repo to true.
+

app/drone-ci/integration/docker-compose.yml

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+version: '3.4'
+services:
+  drone-runner:
+    image: drone/drone-runner-docker:latest
+    restart: always
+    environment:
+      - DRONE_RPC_PROTO=https
+      - DRONE_RPC_HOST=drone.deuxfleurs.fr
+      - DRONE_RPC_SECRET=${DRONE_SECRET}
+      - DRONE_RUNNER_CAPACITY=1
+      - DRONE_DEBUG=true
+      - DRONE_LOGS_TRACE=true
+      - DRONE_RPC_DUMP_HTTP=true
+      - DRONE_RPC_DUMP_HTTP_BODY=true
+      - DRONE_RUNNER_NAME=${DRONE_NAME}
+      - DRONE_RUNNER_LABELS=nix:1
+      #- DRONE_RUNNER_VOLUMES=/var/lib/drone/nix:/nix
+    ports:
+      - "3000:3000/tcp"
+    volumes:
+      - "/var/run/docker.sock:/var/run/docker.sock"
+      - "/var/lib/drone/nix:/var/lib/drone/nix"
+
+  drone-gc: 
+    image: drone/gc:latest
+    restart: always
+    environment:
+      - GC_DEBUG=true
+      - GC_CACHE=10gb
+      - GC_INTERVAL=10m
+    volumes:
+      - "/var/run/docker.sock:/var/run/docker.sock"

app/drone-ci/secrets/drone-ci/cookie_secret

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+CMD openssl rand -hex 16

app/drone-ci/secrets/drone-ci/db_enc_secret

@@ -0,0 +1 @@
+CMD_ONCE openssl rand -hex 16

app/drone-ci/secrets/drone-ci/oauth_client_id

@@ -0,0 +1 @@
+USER OAuth client ID (on Gitea)

app/drone-ci/secrets/drone-ci/oauth_client_secret

@@ -0,0 +1 @@
+USER OAuth client secret (for gitea)

app/drone-ci/secrets/drone-ci/rpc_secret

@@ -1 +1 @@
-USER Drone RPC secret
+CMD openssl rand -hex 16

app/drone-ci/secrets/drone-ci/s3_ak

@@ -0,0 +1 @@
+USER S3 (garage) access key for Drone

app/drone-ci/secrets/drone-ci/s3_db_bucket

@@ -0,0 +1 @@
+CONST drone-db

app/drone-ci/secrets/drone-ci/s3_sk

@@ -0,0 +1 @@
+USER S3 (garage) secret key for Drone

app/drone-ci/secrets/drone-ci/s3_storage_bucket

@@ -0,0 +1 @@
+CONST drone-storage