Files
discourse/.env.sample
notplants 0dd3d1d4be feat(db): switch to discourse/postgres image (auto-upgrade, minimal wrapper)
Replace the bitnami-era pgvector:pg17 db + hand-rolled pg_upgrade entrypoint
with discourse/postgres:pg18 (pgvector + discourse's auto-upgrade layer, as
suggested on coop-cloud/discourse#16). The image does the in-place major-version
pg_upgrade itself on boot, so the recipe just configures it via env:

- cc-db-entrypoint.sh is now a 5-line wrapper that only injects the password
  secret (the image reads DB_PASSWORD/POSTGRES_PASSWORD from env, no *_FILE);
- POSTGRES_USER (the install user pg_upgrade must match) defaults to the image's
  'postgres' -- correct for fresh installs and bitnami-origin clusters -- and is
  overridable from the app .env for a cluster bootstrapped with another superuser;
- POSTGRES_INITDB_ARGS=--no-data-checksums so the new pg18 cluster matches the
  pre-18 clusters (pg18 initdb enables checksums by default, pg_upgrade requires
  a match). No need to install the old postgres in our wrapper anymore.

- mount postgresql_data at /var/lib/postgresql (versioned PGDATA .../18/docker)
- pg_backup.sh: detect the superuser at runtime; fix paths for the new layout
- document POSTGRES_USER override in .env.sample and README
- bump DB_ENTRYPOINT_VERSION v7, PG_BACKUP_VERSION v3 (immutable swarm configs)
- drop entrypoint.postgres.sh.tmpl

Verified on cctest: pg17->pg18 upgrade (install user 'postgres', checksums off)
preserves data and serves over HTTPS; fresh install also works.
2026-06-22 18:10:19 +00:00

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TYPE=discourse
DOMAIN=discourse.example.com
## Domain aliases
#EXTRA_DOMAINS=', `www.discourse.example.com`'
LETS_ENCRYPT_ENV=production
# Admin / developer accounts (comma-separated); these become admins on signup
DISCOURSE_DEVELOPER_EMAILS=admin@example.com
# Outgoing email (official discourse/discourse env names)
#DISCOURSE_SMTP_ADDRESS=
#DISCOURSE_SMTP_PORT=587
#DISCOURSE_SMTP_USER_NAME=
#DISCOURSE_SMTP_AUTHENTICATION=login
#DISCOURSE_SMTP_ENABLE_START_TLS=true
# Set this if you send e-mail from a different address than noreply@$DOMAIN
#DISCOURSE_NOTIFICATION_EMAIL=
# SMTP password as a secret
#SECRET_SMTP_PASSWORD_VERSION=v1
SECRET_DB_PASSWORD_VERSION=v1
# Postgres bootstrap superuser (the cluster's "install user"). Defaults to
# `postgres`, which matches fresh installs and bitnami-origin clusters. Only set
# this if you are upgrading a cluster that was bootstrapped with a different
# superuser (e.g. `discourse`) — a postgres major upgrade fails unless it matches.
#POSTGRES_USER=postgres