Ability to specify custom arguments to Kubernetes binaries like kube-scheduler

[bartpeeters]

/kind feature

We would like to use the -vmodule argument of the kube-scheduler, so we can set the log level for the schedule_one.go module to 10, so that it will log scores when scheduling pods in our Kubernetes cluster.

Currently, you can only specify logLevel in the cluster spec for kubeScheduler:

kind: Cluster
spec:
  kubeScheduler:
    logLevel: 10

This logLevel is then transformed to the --v 10 argument in the kube-scheduler pod manifest.

But this is the log level of all components within kube-scheduler, so setting this to 10, results in a lot of logs, most of which we are not interested in.

It would be nice if you could specify extra arguments to the kube-scheduler and maybe other components like kube-controller-manager, kubelet, ...
Which would allow us to set the --vmodule argument, example:

kind: Cluster
spec:
  kubeScheduler:
    args:
    - "--vmodule schedule_one*=10,scheduler*=3"