docker-compose.yml

services:
  keycloak:
    container_name: baeldung-keycloak.openid-provider
    image: quay.io/keycloak/keycloak:25.0.1
    command:
      - start-dev
      - --import-realm
    ports:
      - 8080:8080
    volumes:
      - ./keycloak/:/opt/keycloak/data/import/
    environment:
      KEYCLOAK_ADMIN: admin
      KEYCLOAK_ADMIN_PASSWORD: ${KEYCLOAK_ADMIN_PASSWORD}
      KC_HTTP_PORT: 8080
      KC_HOSTNAME_URL: http://localhost:8080
      KC_HOSTNAME_ADMIN_URL: http://localhost:8080
      KC_HOSTNAME_STRICT_BACKCHANNEL: true
      KC_HTTP_RELATIVE_PATH: /
      KC_HTTP_ENABLED: true
      KC_HEALTH_ENABLED: true
      KC_METRICS_ENABLED: true
    extra_hosts:
      - "host.docker.internal:host-gateway"
    healthcheck:
      test: ['CMD-SHELL', '[ -f /tmp/HealthCheck.java ] || echo "public class HealthCheck { public static void main(String[] args) throws java.lang.Throwable { System.exit(java.net.HttpURLConnection.HTTP_OK == ((java.net.HttpURLConnection)new java.net.URL(args[0]).openConnection()).getResponseCode() ? 0 : 1); } }" > /tmp/HealthCheck.java && java /tmp/HealthCheck.java http://localhost:8080/auth/health/live']
      interval: 5s
      timeout: 5s
      retries: 20