# Local / single-host deployment.
#
# Secrets come from .env (gitignored). Copy .env.example to .env and set a
# strong POSTGRES_PASSWORD plus a matching DATABASE_URL before `docker compose
# up`. For a production database, point DATABASE_URL at a TLS-enabled endpoint,
# e.g. postgres://user:pass@db.example.com:5432/ctcloud?sslmode=verify-full
#
# The compose bridge network is private; sslmode=disable is only acceptable here
# because the database is not reachable from outside the stack.
services:
  postgres:
    image: postgres:17-alpine
    environment:
      POSTGRES_USER: ${POSTGRES_USER:-ctcloud}
      POSTGRES_PASSWORD: ${POSTGRES_PASSWORD:?set POSTGRES_PASSWORD in .env}
      POSTGRES_DB: ${POSTGRES_DB:-ctcloud}
    volumes:
      - pgdata:/var/lib/postgresql/data
    healthcheck:
      test: ["CMD-SHELL", "pg_isready -U ${POSTGRES_USER:-ctcloud} -d ${POSTGRES_DB:-ctcloud}"]
      interval: 5s
      timeout: 5s
      retries: 12
    mem_limit: 1g
    cpus: 2.0
    pids_limit: 256
    logging:
      driver: json-file
      options: { max-size: "10m", max-file: "3" }
    restart: unless-stopped

  ctcloud:
    build: .
    depends_on:
      postgres:
        condition: service_healthy
    # All optional tuning (DNS_SERVERS, PROBE_*, UI_USER, ...) comes from .env.
    # Leave DNS_SERVERS unset to use the curated + community resolver list.
    env_file:
      - .env
    environment:
      METRICS_ADDR: ":9090"
    # Loopback by default. Set UI_BIND=0.0.0.0 in .env to reach the UI/metrics
    # from another host (there is no auth unless UI_USER/UI_PASS is set).
    ports:
      - "${UI_BIND:-127.0.0.1}:9090:9090"
    # No application volume: the container is stateless apart from PostgreSQL.
    read_only: true
    tmpfs:
      - /tmp:size=16m,noexec,nosuid
    security_opt:
      - no-new-privileges:true
    cap_drop:
      - ALL
    mem_limit: 1g
    cpus: 2.0
    pids_limit: 512
    logging:
      driver: json-file
      options: { max-size: "10m", max-file: "3" }
    restart: unless-stopped

volumes:
  pgdata: