openstack UPI: soft-anti-affinity policy for CP

[pierreprinetti]

This places the Control Plane servers in a Server Group that enforces
"soft anti-affinity" policy.

"Soft anti-affinity" will cause Nova to create VMs on separate hosts, if
that is possible.

Implements OSASINFRA-1015

[pierreprinetti]

/uncc jhixson74 patrickdillon

[pierreprinetti]

/label platform/openstack

[mandre]

/approve

[openshift-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: mandre

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• docs/user/openstack/OWNERS [mandre]
• upi/openstack/OWNERS [mandre]

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[pierreprinetti]

/retest

[pierreprinetti]

/retest

[pierreprinetti]

/retest

[pierreprinetti]

(test failures are not relevant)

[tomassedovic]

/lgtm
/hold

I like it, thanks! I've been planning to do a 4.4 UPI run and I'll include this chance to give this a go. But it may take a few days. The change looks perfect to me, I just didn't get to test it yet.

If you've tested this works, feel free to cancel the hold.

[mandre]

/lgtm 👍

[tomassedovic]

/hold cancel

I did test this patch locally and had no issues with it.

[openshift-bot]

/retest

Please review the full test history for this PR and help us cut down flakes.

[openshift-ci-robot]

@pierreprinetti: The following test failed, say /retest to rerun all failed tests:

Test name	Commit	Details	Rerun command
ci/prow/e2e-aws-scaleup-rhel7	2b6ccf7	link	/test e2e-aws-scaleup-rhel7

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.

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