blocked-edges/4.3.0-rc.3: Allow 4.3.0-rc.0 -> 4.3.0-rc.3

[wking]

Baked in edges:

$ oc adm release info quay.io/openshift-release-dev/ocp-release:4.3.0-rc.0-x86_64 | grep Upgrades
  Upgrades: 4.2.13
$ oc adm release info quay.io/openshift-release-dev/ocp-release:4.3.0-rc.3-x86_64 | grep Upgrades
  Upgrades: 4.2.16, 4.3.0-rc.0, 4.3.0-rc.1, 4.3.0-rc.2

The wide from regexp was appropriate for 4.3.0-rc.0, which had no 4.3 update sources. But rc.3 does have update sources, and we want to allow 4.3.0-rc.0 -> 4.3.0-rc.3, because it is not impacted by the
4.2->4.3 GCP update bug. The overly-strict regexp was from 6d3db09 (#34).

Also expand the referenced bugs to for the blocked 4.2 -> 4.3 edges (elaborating on this comment):

• Update hangs with rhbz#1786993:

    Working towards 4.3.0...: 13% complete
  

  and machine-config going Degraded=True with RequiredPoolsFailed:

    Unable to apply 4.3.0-...: timed out waiting for the condition during syncRequiredMachineConfigPools: pool master has not progressed to latest configuration: controller version mismatch for rendered-master-6c22... expected 23a6... has d780... retrying
  

  Fixed in 4.2 with MCO 31fed93 and in 4.2 with MCO 25bb6ae.

  $ oc adm release info --commits registry.svc.ci.openshift.org/ocp/release:4.2.14 | grep machine-config
    machine-config-operator                       https://github.com/openshift/machine-config-operator                       d780d197a9c5848ba786982c0c4aaa7487297046
  $ oc adm release info --commits registry.svc.ci.openshift.org/ocp/release:4.2.16 | grep machine-config
    machine-config-operator                       https://github.com/openshift/machine-config-operator                       31fed93186c9f84708f5cdfd0227ffe4f79b31cd

  So the 4.2 fix was in 4.2.16.

  $ oc adm release info --commits registry.svc.ci.openshift.org/ocp/release:4.3.0-rc.0 | grep machine-config
    machine-config-operator                       https://github.com/openshift/machine-config-operator                       23a6e6fb37e73501bc3216183ef5e6ebb15efc7a
  $ oc adm release info --commits registry.svc.ci.openshift.org/ocp/release:4.3.0-rc.3 | grep machine-config
    machine-config-operator                       https://github.com/openshift/machine-config-operator                       25bb6aeb58135c38a667e849edf5244871be4992

  So the 4.3 fix was new in rc.3.

• Updates hang with FailedCreatePodSandBox events in the openshift-ingress namespace like rhbz#1787635:

    pod/router-default-...: Failed create pod sandbox: rpc error: code = Unknown desc = failed to create pod network sandbox k8s_router-default-..._openshift-ingress_...(...): Multus: error adding pod to network "openshift-sdn": delegateAdd: error invoking DelegateAdd - "openshift-sdn": error in getting result from AddNetwork: CNI request failed with status 400: 'failed to run IPAM for ...: failed to run CNI IPAM ADD: failed to allocate for range 0: no IP addresses available in range set: <ip1>-<ip2>
  

  Fixed in 4.2 with MCO 9366460 and in 4.3 with MCO 311a01e.

  $ git --no-pager log --first-parent --oneline -4 origin/release-4.2
  6e0df82c (origin/release-4.2) Merge pull request #1347 from openshift-cherrypick-robot/cherry-pick-1285-to-release-4.2
  93664600 Merge pull request #1362 from rphillips/fixes/1787581_4.2
  bd358bb7 Merge pull request #1323 from openshift-cherrypick-robot/cherry-pick-1320-to-release-4.2
  31fed931 Merge pull request #1358 from runcom/osimageurl-race-42

  so the 4.2 fix was after 4.2.16's 31fed93186.

  $ git --no-pager log --first-parent --oneline -8 origin/release-4.3
  3ad3a836 (origin/release-4.3) Merge pull request #1399 from celebdor/haproxy-v4v6
  25503eee Merge pull request #1353 from russellb/1211-4.3-backport
  67ab306b Merge pull request #1426 from mandre/ssc43
  d74f56fe Merge pull request #1410 from retroflexer/manual-cherry-pick-from-master
  207cc171 Merge pull request #1406 from openshift-cherrypick-robot/cherry-pick-1396-to-release-4.3
  25bb6aeb Merge pull request #1359 from runcom/osimageurl-race-43
  311a01e8 Merge pull request #1361 from rphillips/fixes/1787581_4.3
  23a6e6fb Merge pull request #1348 from openshift-cherrypick-robot/cherry-pick-1285-to-release-4.3

  So the 4.3 fix was between rc.0's 23a6e6fb37 and rc.3's 25bb6aeb58 (see release info calls in the previous list entry for those commit hashes).

• Update CI fails with rhbz#1781763 gcp#214:

    Could not reach HTTP service through <ip>:80 after 2m0s
  

  and authentication going Degraded=True with RouteHealthDegradedFailedGet:

    RouteHealthDegraded: failed to GET route: dial tcp <ip>:443: connect: connection refused
  

  Fixed in 4.2 with SDN 677b3a8 and in 4.3 with SDN 74a8aee.

  $ oc adm release info --commits registry.svc.ci.openshift.org/ocp/release:4.2.16 | grep ' node '
    node                                          https://github.com/openshift/sdn                                           770cb7bf922a721bc6c62af5490439d6174036fe
  $ oc adm release info --commits registry.svc.ci.openshift.org/ocp/release:4.2.14 | grep ' node '
    node                                          https://github.com/openshift/sdn                                           770cb7bf922a721bc6c62af5490439d6174036fe
  $ git --no-pager log --first-parent --oneline -4 origin/release-4.2
  098a6410 (origin/release-4.2) Merge pull request #95 from danwinship/fork-k8s-client-go-4.2
  9955a65b Merge pull request #72 from juanluisvaladas/too_many_dns_queries_42
  677b3a80 Merge pull request #90 from openshift-cherrypick-robot/cherry-pick-81-to-release-4.2
  770cb7bf Merge pull request #73 from danwinship/egressip-cleanup-4.2

  So the fix landed after 4.2.16's 770cb7bf.

  $ oc adm release info --commits registry.svc.ci.openshift.org/ocp/release:4.3.0-rc.0 | grep ' sdn '
    sdn                                           https://github.com/openshift/sdn                                           d4e36d5019ef0e130e0d246581508821a7322753
  $ git --no-pager log --first-parent --oneline -5 origin/release-4.3
  490a574e (origin/release-4.3) Merge pull request #98 from openshift-cherrypick-robot/cherry-pick-96-to-release-4.3
  85ab1033 Merge pull request #78 from openshift-cherrypick-robot/cherry-pick-57-to-release-4.3
  d4e36d50 Merge pull request #85 from openshift-cherrypick-robot/cherry-pick-84-to-release-4.3
  dabc4ef5 Merge pull request #83 from dougbtv/backport-build-use-host-local
  74a8aee3 Merge pull request #81 from openshift-cherrypick-robot/cherry-pick-79-to-release-4.3

  So the fix landed before rc.0's d4e36d50.

• GCP update CI fails with 11:

    Could not reach HTTP service through <ip>:80 after 2m0s
  

  in 4.2.16 -> 4.3.0-rc.0, 4.2.16 -> 4.3.0-rc.3, and 4.2.18 -> 4.3.1. This doesn't happen every time though; at least one 4.2.16 -> 4.3.0-rc.3 has passed on GCP. We don't have a root-cause yet, but the final failure matches rbhz#1781763 discussed above.

[eparis]

/lgtm

[openshift-ci-robot]

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