feat(discourse): switch app to official discourse/discourse image (experimental)

Replaces the paywalled bitnamilegacy app with the official discourse/discourse
image behind Traefik. DB is reused as-is; uploads migrate from the legacy
bitnami volume idempotently. The wrapper entrypoint injects the db_password and
smtp_password secrets (the official image has no *_FILE support). SMTP env vars
are renamed to the official names; release notes cover the migration.

Recipe 0.8.1+3.5.0 -> 1.0.0+3.5.3 (major: new image, env/volume/port changes).

compose.yml

@@ -3,53 +3,64 @@ version: "3.8"
 
 services:
   app:
-    image: bitnamilegacy/discourse:3.5.0
+    image: discourse/discourse:3.5.3
     networks:
       - proxy
       - internal
-    # entrypoint: ['tail', '-f', '/dev/null']
+    # official image CMD is /sbin/boot; wrapper injects the DB password secret first
+    entrypoint: /usr/local/bin/cc-app-entrypoint.sh
     environment:
-      - ALLOW_EMPTY_PASSWORD=yes
-      - DISCOURSE_DATABASE_HOST=${STACK_NAME}_db
-      - DISCOURSE_DATABASE_NAME=discourse
-      - DISCOURSE_DATABASE_PASSWORD_FILE=/run/secrets/db_password
-      - DISCOURSE_DATABASE_USER=discourse
-      - DISCOURSE_HOST=${DOMAIN}
-      - DISCOURSE_NOTIFICATION_EMAIL
-      - DISCOURSE_SMTP_AUTH
-      - DISCOURSE_SMTP_HOST
+      - DISCOURSE_HOSTNAME=${DOMAIN}
+      - DISCOURSE_DEVELOPER_EMAILS=${DISCOURSE_DEVELOPER_EMAILS}
+      - DISCOURSE_DB_HOST=${STACK_NAME}_db
+      - DISCOURSE_DB_PORT=5432
+      - DISCOURSE_DB_NAME=discourse
+      - DISCOURSE_DB_USERNAME=discourse
+      - DISCOURSE_REDIS_HOST=${STACK_NAME}_redis
+      - DISCOURSE_REDIS_PORT=6379
+      - DISCOURSE_SMTP_ADDRESS
       - DISCOURSE_SMTP_PORT
-      - DISCOURSE_SMTP_PROTOCOL
-      - DISCOURSE_SMTP_USER
-      - PASSENGER_COMPILE_NATIVE_SUPPORT_BINARY=0
+      - DISCOURSE_SMTP_USER_NAME
+      - DISCOURSE_SMTP_PASSWORD
+      - DISCOURSE_SMTP_AUTHENTICATION
+      - DISCOURSE_SMTP_ENABLE_START_TLS
+      - DISCOURSE_NOTIFICATION_EMAIL
     volumes:
-      - 'discourse_data:/bitnami/discourse'
+      - 'discourse_shared:/shared'
+      # transition only: legacy bitnami volume, read-only, for one-time upload migration
+      - 'discourse_data:/legacy:ro'
     secrets:
       - db_password
+    configs:
+      - source: app_entrypoint
+        target: /usr/local/bin/cc-app-entrypoint.sh
+        mode: 0555
+      - source: app_install_ssl
+        target: /etc/runit/1.d/install-ssl
+        mode: 0555
+      - source: app_migrate_uploads
+        target: /etc/runit/1.d/02-migrate-bitnami-uploads
+        mode: 0555
     depends_on:
       - db
       - redis
     deploy:
       update_config:
         failure_action: rollback
-        order: start-first
+        order: stop-first
       labels:
         - "traefik.enable=true"
-        - "traefik.http.services.${STACK_NAME}.loadbalancer.server.port=3000"
+        - "traefik.http.services.${STACK_NAME}.loadbalancer.server.port=80"
         - "traefik.http.routers.${STACK_NAME}.rule=Host(`${DOMAIN}`${EXTRA_DOMAINS})"
         - "traefik.http.routers.${STACK_NAME}.entrypoints=web-secure"
         - "traefik.http.routers.${STACK_NAME}.tls.certresolver=${LETS_ENCRYPT_ENV}"
-        ## Redirect from EXTRA_DOMAINS to DOMAIN
-        #- "traefik.http.routers.${STACK_NAME}.middlewares=${STACK_NAME}-redirect"
-        #- "traefik.http.middlewares.${STACK_NAME}-redirect.headers.SSLForceHost=true"
-        #- "traefik.http.middlewares.${STACK_NAME}-redirect.headers.SSLHost=${DOMAIN}"
-        - "coop-cloud.${STACK_NAME}.version=0.8.1+3.5.0"
+        - "coop-cloud.${STACK_NAME}.version=1.0.0+3.5.3"
     healthcheck:
-      test: "ruby -e \"require 'uri'; require 'net/http'; uri = URI('http://localhost:3000/srv/status'); res = Net::HTTP.get_response(uri); if res.is_a?(Net::HTTPSuccess) then exit (0) else exit (1) end\""
+      test: "curl -fsS http://localhost/srv/status || exit 1"
       interval: 30s
       timeout: 10s
       retries: 6
-      start_period: 20m
+      start_period: 25m
 
   db:
     image: pgvector/pgvector:pg17
@@ -72,6 +83,15 @@ services:
       - POSTGRES_USER=discourse
       - POSTGRES_DB=discourse
       - POSTGRES_PASSWORD_FILE=/run/secrets/db_password
+    healthcheck:
+      test: "pg_isready -U discourse -d discourse"
+      interval: 30s
+      timeout: 10s
+      retries: 5
+      # generous: a postgres major-version upgrade (apt install + pg_upgrade) runs
+      # in the entrypoint before the server accepts connections — don't let the
+      # healthcheck kill an in-progress migration
+      start_period: 10m
     deploy:
       labels:
         backupbot.backup: "true"
@@ -85,35 +105,12 @@ services:
       - internal
     volumes:
       - 'redis_data:/data'
-
-  sidekiq:
-    image: bitnamilegacy/discourse:3.5.0
-    networks:
-      - proxy
-      - internal
-    depends_on:
-      - discourse
-    volumes:
-      - 'discourse_data:/bitnami/discourse'
-    command: /opt/bitnami/scripts/discourse-sidekiq/run.sh
-    secrets:
-      - db_password
-    environment:
-      - ALLOW_EMPTY_PASSWORD=yes
-      - DISCOURSE_DATABASE_HOST=db
-      - DISCOURSE_DATABASE_NAME=discourse
-      - DISCOURSE_DATABASE_PASSWORD_FILE=/run/secrets/db_password
-      - DISCOURSE_DATABASE_PORT_NUMBER=5432
-      - DISCOURSE_DATABASE_USER=discourse
-      - DISCOURSE_HOST=${DOMAIN}
-      - DISCOURSE_REDIS_HOST=redis
-      - DISCOURSE_REDIS_PORT_NUMBER=6379
-      - DISCOURSE_SMTP_HOST
-      - DISCOURSE_SMTP_PORT
-      - DISCOURSE_SMTP_PROTOCOL
-      - DISCOURSE_SMTP_USER
-      - PASSENGER_COMPILE_NATIVE_SUPPORT_BINARY=0
-      - DISCOURSE_SMTP_AUTH
+    healthcheck:
+      test: "redis-cli ping | grep -q PONG"
+      interval: 30s
+      timeout: 5s
+      retries: 5
+      start_period: 30s
 
 secrets:
   db_password:
@@ -123,6 +120,7 @@ secrets:
 volumes:
   postgresql_data:
   redis_data:
+  discourse_shared:
   discourse_data:
 
 networks:
@@ -131,6 +129,15 @@ networks:
   internal:
 
 configs:
+  app_entrypoint:
+    name: ${STACK_NAME}_app_entrypoint_${APP_ENTRYPOINT_VERSION}
+    file: cc-app-entrypoint.sh
+  app_install_ssl:
+    name: ${STACK_NAME}_app_install_ssl_${APP_INSTALL_SSL_VERSION}
+    file: app-install-ssl.sh
+  app_migrate_uploads:
+    name: ${STACK_NAME}_app_migrate_uploads_${APP_MIGRATE_UPLOADS_VERSION}
+    file: migrate-uploads.sh
   db_entrypoint:
     name: ${STACK_NAME}_db_entrypoint_${DB_ENTRYPOINT_VERSION}
     file: entrypoint.postgres.sh.tmpl