haproxy

HAProxy is a free, open source high availability solution, providing load balancing and proxying for TCP and HTTP-based applications by spreading requests across multiple servers. It is written in C and has a reputation for being fast and efficient (in terms of processor and memory usage).

See HAProxy.org for more information

This image is built by IBM to run on the IBM Z architecture and is not affiliated with any other community that provides a version of this image.

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License

View license information here

As with all Docker images, these likely also contain other software which may be under other licenses (such as Bash, etc from the base distribution, along with any direct or indirect dependencies of the primary software being contained).

As for any pre-built image usage, it is the image user's responsibility to ensure that any use of this image complies with any relevant licenses for all software contained within.

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Versions

Use the pull string below for the version of this image you require.

3.0.0-bookworm	docker pull icr.io/ibmz/haproxy@sha256:5bb042ac6e1ca1f4f4b71491be7945ca64a20972ecd2db6b7ce59b6289aaa065	Vulnerability Report	10-07-2024
Version	Pull String	Security (IBM Cloud)	Created

Usage Notes

Since no two users of HAProxy are likely to configure it exactly alike, this image does not come with any default configuration.

Please refer to upstream's excellent (and comprehensive) documentation on the subject of configuring HAProxy for your needs.

It is also worth checking out the examples/ directory from upstream.

At a basic level, an HAProxy confirguration file, called haproxy.cfg, is created to define haproxy's function. Here is a basic example of what haproxy.cfg might look like:

frontend http_front
bind *:80
default_backend http_back

backend http_back
balance roundrobin
server example-server [Page IP]:[Page Port] check


This configuration will cause HAProxy to listen on port number 80, then direct traffic to the server defined in the backend. For an easy demonstration, the server could be set up as any other running Docker container on your system which serves a webpage. In that case, you would set [Page IP] to your system's IP, and [Page Port] to the port you assigned the container to listen on.

Create a file Dockerfile in the directory containing your haproxy.cfg file:

FROM icr.io/ibmz/haproxy:[version]
COPY haproxy.cfg /usr/local/etc/haproxy/haproxy.cfg

build the container:

docker build -t my-haproxy .

Test the configuration file:

docker run -it --rm --name haproxy-syntax-check my-haproxy haproxy -c -f /usr/local/etc/haproxy/haproxy.cfg

This should return the text Configuration file is valid.

Run the container:

docker run -d -p 8098:80 --name run-haproxy --sysctl net.ipv4.ip_unprivileged_port_start=0 my-haproxy

You can now access [Your system IP]:8098 in a browser window. This should direct you to the destination specified in HAProxy.cfg!