Implement leader-for-life election.

[jmencak]

Fixes: https://bugzilla.redhat.com/show_bug.cgi?id=1719967

[openshift-ci-robot]

@jmencak: This pull request references a valid Bugzilla bug.

In response to this:

Bug 1719967: Implement leader-for-life election.

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[jmencak]

@zvonkok , mind taking a look in Sebastian's absence? Thanks!

[zvonkok]

The same approach as here: https://github.com/zvonkok/special-resource-operator/blob/a065b27c1aa9219b3960a8ea47069754a5533920/cmd/manager/main.go#L56
and this works if multiple instances of the operator are running, one is leader and the other ones are "only" waiting to become leader.

/lgtm

[openshift-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: jmencak, zvonkok

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[jmencak]

/uncc @sjug

[jmencak]

/cherrypick release-4.1

[openshift-cherrypick-robot]

@jmencak: new pull request created: #68

In response to this:

/cherrypick release-4.1

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[openshift-ci-robot]

@jmencak: No Bugzilla bug is referenced in the title of this pull request.
To reference a bug, add 'Bug XXX:' to the title of this pull request and request another bug refresh with /bugzilla refresh.

In response to this:

Implement leader-for-life election.

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.