Allow to bind health endpoint to a specifc adress

[dodgex]

Is your feature request related to a problem? Please describe

I'm evaluating kubernetes (using k0s) for my home lab and while working on a PoC setup I realized, that it is not possible to bind the health endpoint of kube-router to a specific ip.

Describe the solution you'd like

Similar to how the metrics can be configured to bind to a specific address, I would love to see this for the health endpoint too.

Describe alternatives you've considered

Configuring iptables to block the access to the port.

Additional context

#385 mentions BGP, gRPC and health check, only BGP changed. gRPC has got a new issue and was fixed. health remained unchanged.

#662: asked for health and metrics in 2019 but ended up beeing closed as stale

#1570 adds support for metrics address

[dodgex]

From what I found in the code, as well as the metrics PR, this change should be not too complex. Assuming, that the fact that the endpoint only listens on a specific address is not a problem for kubernetes or other parts of this project.

If it is as straight forward as adding the configuration property similar to what has been done for metrics, I would be willing to open a PR. But I have to mention, that I am not sure, if I would be able to properly test the changes. My Kubernetes knowledge is still very basic to pretty much zero. Some guidance would be welcome. :)

[github-actions]

This issue is stale because it has been open 30 days with no activity. Remove stale label or comment or this will be closed in 5 days.

[dodgex]

Not stale, discussion is in PR.