Feature: Allow ManagerOptions to be marshalled

[ryanmcnamara]

It would be very nice if the ManagerOptions https://github.com/kubernetes-sigs/controller-runtime/blob/main/pkg/manager/manager.go#L101 was more easily printable. Example use case: logging on startup to be sure of what config is used.

Using fmt.Sprintf("%#v", options) has been my workaround but it's pretty suboptimal (pointers not followed for example)

Currently using json.Marshal gives an error like

json: unsupported type: func(*rest.Config, *http.Client) (meta.RESTMapper, error)

Failing to marshal this field named MapperProvider

I'd be willing to PR this, what I would do is add the struct tag json:"-" on fields that should not be printed / logged (e.g. MapperProvider) and then use the standard json.Marshal to get my human readable string.

Wanted to gauge interest before making a PR

[k8s-triage-robot]

The Kubernetes project currently lacks enough contributors to adequately respond to all issues.

This bot triages un-triaged issues according to the following rules:

• After 90d of inactivity, lifecycle/stale is applied
• After 30d of inactivity since lifecycle/stale was applied, lifecycle/rotten is applied
• After 30d of inactivity since lifecycle/rotten was applied, the issue is closed

You can:

• Mark this issue as fresh with /remove-lifecycle stale
• Close this issue with /close
• Offer to help out with Issue Triage

Please send feedback to sig-contributor-experience at kubernetes/community.

/lifecycle stale