# ==============================================================================
# EXAMPLE: Load Balancing with Multiple Container Replicas
# ==============================================================================
#
# WHAT THIS DEMONSTRATES:
# - Multiple container replicas behind a single domain
# - Round-robin load balancing across replicas
# - Domain redirect functionality
# - Custom port configuration
#
# REQUIREMENTS (run these first):
# ```bash
# # No special requirements - this example runs on localhost:19901
# ```
#
# HOW TO START:
# ```bash
# docker compose -f docker-compose-multi-containers.yml up -d
# ```
#
# HOW TO VERIFY IT'S WORKING:
# ```bash
# # Test load balancing - hostname should alternate between containers
# curl -H "Host: www.helloworld.com" localhost:19901
# # Expected: Container ID (e.g., f6d8d45b7411)
# curl -H "Host: www.helloworld.com" localhost:19901
# # Expected: Different container ID (e.g., 59b213cb8592)
#
# # Test domain redirect
# curl -I -H "Host: google.helloworld.com" localhost:19901
# # Expected: HTTP/1.1 301 Moved Permanently, Location: www.google.com/
#
# # View HAProxy stats
# # URL: http://localhost:1936
# # Username: admin
# # Password: password
# # You should see 2 backend servers
# ```
#
# CLEAN UP:
# ```bash
# docker compose -f docker-compose-multi-containers.yml down
# ```
#
# ==============================================================================

services:
  haproxy:
    image: byjg/easy-haproxy:5.0.0
    volumes:
      - /var/run/docker.sock:/var/run/docker.sock
    environment:
      EASYHAPROXY_DISCOVER: docker
      HAPROXY_CUSTOMERRORS: "true"
      HAPROXY_USERNAME: admin
      HAPROXY_PASSWORD: password
      HAPROXY_STATS_PORT: 1936
    ports:
        - 19901:19901


  nginx:
      #image: nginx
    image: stenote/nginx-hostname
    deploy:
      replicas: 2
    labels:
      easyhaproxy.http.redirect: '{"google.helloworld.com": "www.google.com"}'
      easyhaproxy.http.host: www.helloworld.com
      easyhaproxy.http.port: 19901
      easyhaproxy.http.localport: 80