Expose CodeFlare Operator metrics endpoint

[ChristianZaccaria]

Resolves #169

Exposed the CodeFlare Operator metrics endpoint

Besides exposing the endpoint, there was a need to change the --metrics-bind-address=127.0.0.1:8080 args, from localhost to 0.0.0.0 for Prometheus to start scraping metrics successfully.

Tested with the CodeFlare Operator alert rules set on this PR: red-hat-data-services/odh-deployer#365

Note: this job was a collaborative effort between @Fiona-Waters, @dimakis, and myself @ChristianZaccaria

Prometheus

[sutaakar]

AFAIK this change will effectively bypass rbac-proxy.
Is it intended? If so, is there any reason to have this proxy on operator?

[ChristianZaccaria]

AFAIK this change will effectively bypass rbac-proxy. Is it intended? If so, is there any reason to have this proxy on operator?

This was not initially intended, however after careful consideration, we concluded that we will be removing the kube-rbac-proxy. #191

This PR lgtm if you're okay with it too. Thanks again for your help and for pointing this out.

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

Approval requirements bypassed by manually added approval.

This pull-request has been approved by: sutaakar

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• OWNERS

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment