Configure kube-proxy and the SDN to expose metrics.

[squeed]

Right now, kube-proxy is configured to listen on a hard-coded port on localhost that conflicts with the kubelet (now that they are separate processes). Change it to listen on an unused port.

Fixes: bz1588420

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[michaelgugino]

This needs to be patched in openshift, not the installer.

[vrutkovs]

This does expose metrics on 11257, however openshift-monitoring doesn't scrape that target.

Also, I agree with Michael - if its a static port number it should be baked in kube-proxy

[dcbw]

Clayton says we need to pick a port between 9000 -> 10000 that's currently unused by other things, and have our operator configure that metrics port for the SDN.

[openshift-ci-robot]

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Test name	Commit	Details	Rerun command
ci/prow/gcp	00d33f3	link	/test gcp
ci/prow/gcp-crio	00d33f3	link	/test gcp-crio
ci/prow/e2e-aws	00d33f3	link	/test e2e-aws

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[vrutkovs]

Master branch is closed! A major refactor is ongoing in devel-40. Changes for 3.x should be made directly to the latest release branch they're relevant to and backported from there.