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Other configurations

Proxy Headers​

EasyHAProxy automatically sets standard proxy-awareness headers for all HTTP requests:

HeaderDescriptionExample Value
X-Forwarded-ForClient IP address203.0.113.50
X-Forwarded-PortPort HAProxy received request on443
X-Forwarded-ProtoProtocol (http or https)https
X-Forwarded-HostOriginal Host header from clientexample.com
X-Request-IDUnique request identifier (UUID)550e8400-e29b-41d4-a716-446655440000

These headers help backend applications:

  • Determine the original client IP
  • Detect HTTPS vs HTTP
  • Generate correct URLs with proper hostname
  • Correlate requests for debugging and monitoring

Note: Headers are only added in HTTP mode, not TCP mode.

Exposing Ports​

Some ports on the EasyHAProxy container and in the firewall are required to be open. However, you don't need to expose the other container ports because EasyHAProxy will handle that.

  • The ports 80 and 443.
  • If you enable the HAProxy statistics, you must also expose the port defined in HAPROXY_STATS_PORT environment variable (default 1936). Statistics are only generated when you set HAPROXY_PASSWORD.
  • Every port defined in easyhaproxy.[definitions].port also should be exposed.

For example:

Expose required ports
docker run \
    /* other parameters */
    -p 80:80 \
    -p 443:443 \
    -p 1936:1936 \
    -d byjg/easy-haproxy

Mapping Docker Volume​

The docker volume or a way to call the API needs to pass to the EasyHAProxy container.

Mount Docker socket
docker run \
    /* other parameters */
    -v /var/run/docker.sock:/var/run/docker.sock \
    -d byjg/easy-haproxy

Mapping custom .cfg files​

You can concatenate valid HAProxy .cfg files to the dynamically generated haproxy.cfg by mapping the folder /etc/easyhaproxy/haproxy/conf.d.

Mount custom config directory
docker run \
    /* other parameters */
    -v /your/local/conf.d:/etc/easyhaproxy/haproxy/conf.d \
    -d byjg/easy-haproxy

Setting Custom Errors​

If enabled, map the volume : /etc/easyhaproxy/haproxy/errors-custom/ to your container and put a file named ERROR_NUMBER.http where ERROR_NUMBER is the HTTP error code (e.g., 503.http)

Open source ByJG