Restart controller manager process when certs change on disk

[mfojtik]

This is added a side-car container to the controller-manager process that use shared PID namespace to watch the certificates in the main container and perform graceful termination of the main container (controller-manager) process when the certificates change on disk.

/cc @tnozicka
/cc @deads2k
/cc @sttts

[openshift-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: mfojtik
To fully approve this pull request, please assign additional approvers.
We suggest the following additional approver: sttts

If they are not already assigned, you can assign the PR to them by writing /assign @sttts in a comment when ready.

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

The pull request process is described here

Details

Needs approval from an approver in each of these files:

• OWNERS [mfojtik]
• vendor/k8s.io/api/events/OWNERS
• vendor/k8s.io/apimachinery/pkg/apis/config/OWNERS

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

[openshift-ci-robot]

@mfojtik: The following tests failed, say /retest to rerun them all:

Test name	Commit	Details	Rerun command
ci/prow/e2e-aws-upgrade	3fa8cea	link	/test e2e-aws-upgrade
ci/prow/unit	3fa8cea	link	/test unit
ci/prow/verify	3fa8cea	link	/test verify

Full PR test history. Your PR dashboard. Please help us cut down on flakes by linking to an open issue when you hit one in your PR.

Details

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository. I understand the commands that are listed here.

[openshift-ci-robot]

@mfojtik: PR needs rebase.

Details

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.

[mfojtik]

We already redeploy when these certs change, closing.