---
version: "3.8"

services:
  app:
    image: plausible/analytics:v2.0.0
    command: sh -c "sleep 10 && /entrypoint.sh db createdb && /entrypoint.sh db migrate && /entrypoint.sh run"
    depends_on:
      - db
      - plausible_events_db
    environment:
      - BASE_URL=https://$DOMAIN
      - SECRET_KEY_BASE
      - DATABASE_URL=postgres://plausible:plausible@${STACK_NAME}_db:5432/plausible
      - CLICKHOUSE_DATABASE_URL=http://${STACK_NAME}_plausible_events_db:8123/plausible_events_db
      - SMTP_HOST_ADDR
      - MAILER_EMAIL
      - SMTP_HOST_PORT
      - SMTP_USER_NAME
      - SMTP_USER_PWD
      - SMTP_HOST_SSL_ENABLED
      - DISABLE_REGISTRATION
      - DISABLE_AUTH
    networks:
      - proxy
      - internal
    deploy:
      restart_policy:
        # `any`, not `on-failure`: when postgres is disrupted under the app (e.g. a restore),
        # the BEAM supervision tree escalates and Erlang shuts down GRACEFULLY (exit 0) — with
        # on-failure swarm marks the task Complete and never restarts it, leaving the app down.
        condition: any
      labels:
        - "traefik.enable=true"
        - "traefik.http.services.${STACK_NAME}.loadbalancer.server.port=8000"
        - "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}"
        - coop-cloud.${STACK_NAME}.version=3.1.0+v2.0.0
  db:
    image: pgautoupgrade/pgautoupgrade:18-alpine
    volumes:
      - db-data:/var/lib/postgresql/data
    environment:
      # pin legacy PGDATA so the existing cluster on the volume is upgraded in place, not re-init'd
      - PGDATA=/var/lib/postgresql/data
      - POSTGRES_USER=plausible
      - POSTGRES_PASSWORD=plausible
      - POSTGRES_DB=plausible
    networks:
      - internal
    healthcheck:
      test: ["CMD-SHELL", "pg_isready -U plausible -d plausible"]
      interval: 5s
      timeout: 5s
      retries: 60
    deploy:
      labels:
        backupbot.backup: "true"
        # backup-bot-two v2 snapshots paths INSIDE named volumes (backupbot.backup.volumes.<vol>.path,
        # relative to the volume root) and ignores the old `backupbot.backup.path` label — a dump
        # written to the container root fs never reaches the snapshot, so restore finds nothing.
        # The dump therefore lives (transiently — the hooks remove it) at the db-data volume root.
        backupbot.backup.volumes.db-data.path: "postgres.dump.gz"
        backupbot.backup.pre-hook: sh -c 'pg_dump -U "$$POSTGRES_USER" -Fc "$$POSTGRES_DB" | gzip > /var/lib/postgresql/data/postgres.dump.gz'
        backupbot.backup.post-hook: "rm -f /var/lib/postgresql/data/postgres.dump.gz"
        backupbot.restore: "true"
        # --if-exists: without it the DROPs error on objects absent from the live db and
        # pg_restore exits 1 ("errors ignored"), killing the && chain (dump left behind).
        # pg_terminate_backend afterwards: pg_restore --clean recreates objects under the live
        # app, so its pooled connections keep stale type-OID caches ('cache lookup failed for
        # type ...' crash loops, e.g. Oban) — terminating them makes Ecto reconnect fresh.
        backupbot.restore.post-hook: sh -c 'gzip -d /var/lib/postgresql/data/postgres.dump.gz && pg_restore --clean --if-exists -U "$$POSTGRES_USER" --dbname="$$POSTGRES_DB" < /var/lib/postgresql/data/postgres.dump && rm -f /var/lib/postgresql/data/postgres.dump && psql -U "$$POSTGRES_USER" -d "$$POSTGRES_DB" -c "SELECT pg_terminate_backend(pid) FROM pg_stat_activity WHERE datname = current_database() AND pid <> pg_backend_pid();"'

  plausible_events_db:
    image: clickhouse/clickhouse-server:23.4.2.11-alpine
    volumes:
      - event-data:/var/lib/clickhouse
    entrypoint: /custom-entrypoint.sh
    configs:
      - source: clickhouse-config
        target: /etc/clickhouse-server/config.d/logging.xml
      - source: clickhouse-user-config
        target: /etc/clickhouse-server/users.d/clickhouse-user-config.xml
      - source: clickhouse_entrypoint
        target: /custom-entrypoint.sh
        mode: 0555
    networks:
      - internal
    deploy:
      labels:
        backupbot.backup: "true"
        # v2 volumes-include syntax (see db service): snapshot only the clickhouse-backup output
        # inside the event-data volume — not the live raw data files (restoring those under a
        # running server is unsafe; the restore post-hook performs the logical restore instead).
        backupbot.backup.volumes.event-data.path: "backup/events"
        # schema_migrations is a TinyLog table — clickhouse-backup can only FREEZE MergeTree
        # data, so it backs up that table's SCHEMA but not its rows, and a restore would leave
        # the migration ledger empty: the next app boot then re-runs every ClickHouse migration
        # against the fully-built tables and crash-loops (DUPLICATE_COLUMN). Export its rows
        # into the backup dir alongside the clickhouse-backup output, and reload them on restore.
        backupbot.backup.pre-hook: sh -c 'clickhouse-backup create events && clickhouse-client --query "SELECT * FROM plausible_events_db.schema_migrations FORMAT TSV" > /var/lib/clickhouse/backup/events/schema_migrations.tsv'
        backupbot.backup.post-hook: "rm -rf /var/lib/clickhouse/backup/events"
        backupbot.restore: "true"
        backupbot.restore.post-hook: sh -c 'clickhouse-backup restore --rm events && clickhouse-client --query "TRUNCATE TABLE plausible_events_db.schema_migrations" && clickhouse-client --query "INSERT INTO plausible_events_db.schema_migrations FORMAT TSV" < /var/lib/clickhouse/backup/events/schema_migrations.tsv && rm -rf /var/lib/clickhouse/backup/events'

volumes:
  db-data:
  event-data:

networks:
  proxy:
    external: true
  internal:

configs:
  clickhouse-config:
    name: ${STACK_NAME}_clickhouse_config_${CLICKHOUSE_CONF_VERSION}
    file: clickhouse-config.xml
  clickhouse-user-config:
    name: ${STACK_NAME}_clickhouse_user_config_${CLICKHOUSE_USER_CONF_VERSION}
    file: clickhouse-user-config.xml
  clickhouse_entrypoint:
    name: ${STACK_NAME}_clickhouse_entrypoint_${CLICKHOUSE_ENTRYPOINT_VERSION}
    file: entrypoint.clickhouse.sh