docker-socket-proxy/haproxy.cfg

global
    log /dev/log local0

    pidfile /run/haproxy.pid
    maxconn 4000

    # Turn on stats unix socket
    server-state-file /var/lib/haproxy/server-state

defaults
    mode http
    log global
    option httplog
    option dontlognull
    option http-server-close
    option redispatch
    retries 3
    timeout http-request 10s
    timeout queue 1m
    timeout connect 10s
    timeout client 10m
    timeout server 10m
    timeout http-keep-alive 10s
    timeout check 10s
    maxconn 3000

    # Allow seamless reloads
    load-server-state-from-file global

    # Use provided example error pages
    errorfile 400 /usr/local/etc/haproxy/errors/400.http
    errorfile 403 /usr/local/etc/haproxy/errors/403.http
    errorfile 408 /usr/local/etc/haproxy/errors/408.http
    errorfile 500 /usr/local/etc/haproxy/errors/500.http
    errorfile 502 /usr/local/etc/haproxy/errors/502.http
    errorfile 503 /usr/local/etc/haproxy/errors/503.http
    errorfile 504 /usr/local/etc/haproxy/errors/504.http

backend dockerbackend
    server dockersocket /var/run/docker.sock

frontend dockerfrontend
    bind :2375
    http-request deny unless METH_GET || { env(POST) -m bool }
    http-request deny if { path,url_dec -m reg -i ^(/v[\d\.]+)?/auth } ! { env(AUTH) -m bool }
    http-request deny if { path,url_dec -m reg -i ^(/v[\d\.]+)?/build } ! { env(BUILD) -m bool }
    http-request deny if { path,url_dec -m reg -i ^(/v[\d\.]+)?/commit } ! { env(COMMIT) -m bool }
    http-request deny if { path,url_dec -m reg -i ^(/v[\d\.]+)?/containers } ! { env(CONTAINERS) -m bool }
    http-request deny if { path,url_dec -m reg -i ^(/v[\d\.]+)?/events } ! { env(EVENTS) -m bool }
    http-request deny if { path,url_dec -m reg -i ^(/v[\d\.]+)?/exec } ! { env(EXEC) -m bool }
    http-request deny if { path,url_dec -m reg -i ^(/v[\d\.]+)?/images } ! { env(IMAGES) -m bool }
    http-request deny if { path,url_dec -m reg -i ^(/v[\d\.]+)?/info } ! { env(INFO) -m bool }
    http-request deny if { path,url_dec -m reg -i ^(/v[\d\.]+)?/networks } ! { env(NETWORKS) -m bool }
    http-request deny if { path,url_dec -m reg -i ^(/v[\d\.]+)?/nodes } ! { env(NODES) -m bool }
    http-request deny if { path,url_dec -m reg -i ^(/v[\d\.]+)?/_ping } ! { env(PING) -m bool }
    http-request deny if { path,url_dec -m reg -i ^(/v[\d\.]+)?/plugins } ! { env(PLUGINS) -m bool }
    http-request deny if { path,url_dec -m reg -i ^(/v[\d\.]+)?/post } ! { env(POST) -m bool }
    http-request deny if { path,url_dec -m reg -i ^(/v[\d\.]+)?/secrets } ! { env(SECRETS) -m bool }
    http-request deny if { path,url_dec -m reg -i ^(/v[\d\.]+)?/services } ! { env(SERVICES) -m bool }
    http-request deny if { path,url_dec -m reg -i ^(/v[\d\.]+)?/swarm } ! { env(SWARM) -m bool }
    http-request deny if { path,url_dec -m reg -i ^(/v[\d\.]+)?/system } ! { env(SYSTEM) -m bool }
    http-request deny if { path,url_dec -m reg -i ^(/v[\d\.]+)?/tasks } ! { env(TASKS) -m bool }
    http-request deny if { path,url_dec -m reg -i ^(/v[\d\.]+)?/version } ! { env(VERSION) -m bool }
    http-request deny if { path,url_dec -m reg -i ^(/v[\d\.]+)?/volumes } ! { env(VOLUMES) -m bool }
    default_backend dockerbackend