Add support for passing web.max-connections argument to Prometheus

[vivekjainx86]

What is missing? I didn't find any specification in PrometheusSpec to pass --web.max-connections=<integer> argument to Prometheus. Also, there is no support for passing configuration parameter to Prometheus which is not in PrometheusSpec.

Why do we need it? It will be helpful if PrometheusSpec has all the configuration parameters that Prometheus has, or at least there should be a way to provide additional configuration parameters.

Environment

• Prometheus Operator version:

  v2.32.1

[slashpai]

@vivekjainx86 would you like to contribute? :)

[simonpasquier]

or at least there should be a way to provide additional configuration parameters.

I've just filed #4851 which is about this use case as it was an action item from our last office hours meetings :)

[JoaoBraveCoding]

With #4851 being closed shouldn't this be closed as well? Or do we want dedicated support for this?

[simonpasquier]

I'd keep the issue opened. The CRD should eventually allow setting the parameter like this:

spec:
  web:
    maxConnections: 256

[grv180290]

You can try something like this. It works for me in the values.yaml for helm.

          prometheusSpec:
            additionalArgs:
            - name: web.max-connections
              value: "10000"