HAProxy Load Balancer

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HAProxy docker container million12/haproxy with ALPN and HTTP/2 support.

Tags

Please specify tag when deploying for specific version. Example:

million12/haproxy:latest
million12/haproxy:2.1.5

Features

• Support for HTTP/2 with ALPN
• RockyLinux based (migrated at 2.4.16)
• Ability to provide any arguments to haproxy process Any extra parameters provided to docker run will be passed directly to haproxy command. For example, if you run docker run [run options] million12/haproxy -n 1000 you pass -n 1000 to haproxy daemon.
• Pretty lightweight, only ~100M (with OpenSSL and HAProxy compiled from source).
• Default haproxy.cfg provided for demonstration purposes. You can easily mount your own or point to different location using HAPROXY_CONFIG env.
• Auto restart when config changes This container comes with inotify to monitor changes in HAProxy config and reload HAProxy daemon. The reload is done in a way that no connection is lost.

ENV variables

Variable	Default Settings	Notes
HAPROXY_CONFIG	/etc/haproxy/haproxy.cfg	If you mount your config to different location, simply edit it.
HAPROXY_PORTS	80,443	Comma separated ports
HAPROXY_ADDITIONAL_CONFIG	Empty	List of file that inotify should monitor for changes divided by space. Example below. Space separated
HAPROXY_PRE_RESTART_CMD	Empty	Command to execute before restarting haproxy
HAPROXY_POST_RESTART_CMD	Empty	Command to execute after successfully restarting haproxy

Usage

Basic

docker run -ti \
  -p 80:80 \
  -p 443:443 \
  million12/haproxy

Mount custom config , override some options

docker run -d \
  -p 80:80 \
  -v /my-haproxy.cfg:/etc/haproxy/haproxy.cfg \
  million12/haproxy \
  -n 10000

Note: in this case config is mounted to its default location, so you don't need to modify HAPROXY_CONFIG variable.

Monitor additional config files

docker run -d \
  -p 80:80 \
  -e HAPROXY_ADDITIONAL_CONFIG='/etc/haproxy/custom1 /etc/haproxy/custom2' \
  million12/haproxy

Check version and build options

docker run -ti million12/haproxy -vv

Stats

The default URL for stats is http://CONTAINER_IP/admin?stats with username:password ser to admin:admin.

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Authors

Author: Marcin ryzy Ryzycki (marcin@m12.io)
Author: Przemyslaw Ozgo (linux@ozgo.info)