Automated HA-Proxy for Docker containers

Based on https://github.com/clearlinux/dockerfiles/tree/master/haproxy

The idea behind this container is to

• Monitor changes in certain given Docker Network
• React when containers connect/disconnect to this network
• Automatically map names of these containers in HA-Proxy to FQDNs

Usage

• Run this container at least in two Docker Networks.
• By default, it will listen for requests on eth0, so make your end-user-facing network to be first on a list.
• Monitoring tool will automatically modify HA-Proxy settings
• If any new container will show up, it will be added to configuration if it has the following labels set:
  • haproxy.source_port
  • haproxy.target_port
• HA-Proxy config blocks are generated using Jinja template engine
• Built-in templates can be easily overridden by adding the templates directory to HAPROXY_CONFIG_VOLUME with .j2 file(s)

Environment variables

• DOCKER_API_BASE_URL="unix:///var/run/docker.sock"
• DOMAIN_NAME="local"
• HAPROXY_CONFIG_VOLUME="/usr/local/etc/haproxy"
• HAPROXY_PID_FILE="/var/run/haproxy.pid"
• NETWORK_MONITOR_DEBOUNCE="10" - in seconds
• NETWORK_NAME="bridge"

Volumes

• /usr/local/etc/haproxy
• /var/run/docker.sock