Balance two krakend nodes using HAProxy

docker-compose.yml

version: "3"
services:
    balancer:
        image: haproxy:1.7
        volumes:
            - ".//haproxy.cfg:/usr/local/etc/haproxy/haproxy.cfg"
        ports:
            - "8080:80"
    krakend_1:
        image: devopsfaith/krakend
        # We enable the debug endpoint so krakend offers the /__debug endpoint.
        # This option is production-safe (it only answers with a "pong")
        command: run -d -c krakend.json
        volumes:
            - "./:/etc/krakend/"
    krakend_2:
        image: devopsfaith/krakend
        command: run -d -c krakend.json
        volumes:
            - "./:/etc/krakend/"

haproxy.cfg

# This is not a configuration ready for production!!!
# Just a quick test to balance traffic to 2 krakend nodes

defaults
    log     global
    mode    http
    option  httplog
    option  dontlognull
    timeout connect 100
    timeout client  1000
    timeout server  1000

frontend api_gateway
    bind :80
    use_backend nodes

backend nodes
    mode http
    balance roundrobin
    option httpchk GET /health
    server krakend_1 krakend_1:8080 check
    server krakend_2 krakend_2:8080 check

krakend.json

{
    "version": "2",
    "endpoints": [
        {
            "endpoint": "/hello/{user}",
            "backend": [
                {
                    "url_pattern": "/users/{user}",
                    "host": ["https://api.github.com"]
                }
            ]
        },
        {
            "endpoint": "/health",
            "extra_config": {
            "github.com/devopsfaith/krakend/proxy": {
                "static": {
                "data": {
                    "status": "OK"
                },
                "strategy": "always"
                }
            }
            },
            "backend": [
            {
                "url_pattern": "/__debug",
                "host": [
                    "http://localhost:8080"
                ]
            }
            ]
        }
        ]
}