Compose-Examples/examples/keycloak/docker-compose.yml

services:

  postgres:
    image: postgres:16-alpine
    container_name: keycloak-db
    restart: always
    expose:
      - 5432
    volumes:
      - ${DOCKER_VOLUME_STORAGE:-/mnt/docker-volumes}/keycloak/database:/var/lib/postgresql/data
    environment:
      POSTGRES_DB: ${POSTGRES_DB}
      POSTGRES_USER: ${POSTGRES_USER}
      POSTGRES_PASSWORD: ${POSTGRES_PASSWORD}
    healthcheck:
      test: [ "CMD", "pg_isready", "-q", "-d", "${POSTGRES_DB}", "-U", "${POSTGRES_USER}" ]
      interval: 10s
      timeout: 5s
      retries: 3
      start_period: 60s      
    networks:
      - keycloak-internal

  keycloak:
    image: quay.io/keycloak/keycloak:25.0
    container_name: keycloak-app
    command: start
    environment:
      KC_HOSTNAME: ${KEYCLOAK_HOSTNAME}
      KEYCLOAK_ADMIN: ${KEYCLOAK_ADMIN}
      KEYCLOAK_ADMIN_PASSWORD: ${KEYCLOAK_ADMIN_PASSWORD}
      KC_DB: postgres
      KC_DB_URL: jdbc:postgresql://postgres/${POSTGRES_DB}
      KC_DB_USERNAME: ${POSTGRES_USER}
      KC_DB_PASSWORD: ${POSTGRES_PASSWORD}
      KC_PROXY_HEADERS: 'xforwarded'
      KC_HTTP_ENABLED: true
      KC_HEALTH_ENABLED: true
      PROXY_ADDRESS_FORWARDING: 'true'
    healthcheck:
      test:
      - "CMD-SHELL"
      - |
        exec 3<>/dev/tcp/localhost/9000 &&
        echo -e 'GET /health/ready HTTP/1.1\r\nHost: localhost\r\nConnection: close\r\n\r\n' >&3 &&
        cat <&3 | tee /tmp/healthcheck.log | grep -q '200 OK'
      interval: 10s
      timeout: 5s
      retries: 3
      start_period: 90s
    ports:
      - 8080:8080
    expose:
      - 8080 # web ui http
      - 9000 # health endpoint
    restart: always
    depends_on:
      postgres:
        condition: service_healthy
    networks:
      - keycloak-internal
      - proxy
    #labels:
    #  - traefik.enable=true
    #  - traefik.docker.network=proxy
    #  - traefik.http.routers.keycloak.rule=Host(`keycloak.example.com`)
    #  - traefik.http.services.keycloak.loadbalancer.server.port=8080
    #  # Optional part for traefik middlewares
    #  - traefik.http.routers.keycloak.middlewares=local-ipwhitelist@file

networks:
  keycloak-internal:
    internal: true
  proxy:
    external: true