services:
  nats:
    image: nats:2.10-alpine
    restart: unless-stopped
    command: ["-c", "/etc/nats/nats-server.conf"]
    environment:
      - SERVICE_FQDN_NATS_8080
    configs:
      - source: nats-conf
        target: /etc/nats/nats-server.conf
    volumes:
      - nats-data:/data
    expose:
      - "8080"
    healthcheck:
      test: ["CMD", "wget", "-qO-", "http://localhost:8222/healthz"]
      interval: 30s
      timeout: 5s
      retries: 3

configs:
  nats-conf:
    content: |
      server_name: "nats-volcanic"

      port: 4222
      http_port: 8222

      jetstream {
        store_dir: "/data"
        max_memory_store: 256MB
        max_file_store: 4GB
      }

      websocket {
        port: 8080
        no_tls: true
      }

      authorization {
        users = [
          { user: "${NATS_USER}", password: "${NATS_PASSWORD}" }
        ]
      }

volumes:
  nats-data: