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🐛 [0.3] Scale down checks excludes machine about to be deleted #3984

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ncdc
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@ncdc ncdc commented Dec 3, 2020

What this PR does / why we need it:
If the KCP controller crashes (likely in a self managed scenario) while
other operations were in progress, at the next reconciliation loop the
scale down operation would be blocked if for example we were in the
middle of deleting etcd (which would also crash the api server)

Signed-off-by: Vince Prignano vincepri@vmware.com
(cherry picked from commit a284134)

Backport of #3977

Which issue(s) this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged):
Fixes #

If the KCP controller crashes (likely in a self managed scenario) while
other operations were in progress, at the next reconciliation loop the
scale down operation would be blocked if for example we were in the
middle of deleting etcd (which would also crash the api server)

Signed-off-by: Vince Prignano <vincepri@vmware.com>
(cherry picked from commit a284134)
Signed-off-by: Andy Goldstein <goldsteina@vmware.com>
@ncdc ncdc added kind/bug Categorizes issue or PR as related to a bug. priority/critical-urgent Highest priority. Must be actively worked on as someone's top priority right now. area/control-plane Issues or PRs related to control-plane lifecycle management labels Dec 3, 2020
@ncdc ncdc added this to the v0.3.12 milestone Dec 3, 2020
@ncdc ncdc requested review from detiber and vincepri December 3, 2020 15:04
@k8s-ci-robot k8s-ci-robot added the cncf-cla: yes Indicates the PR's author has signed the CNCF CLA. label Dec 3, 2020
@k8s-ci-robot k8s-ci-robot added the size/L Denotes a PR that changes 100-499 lines, ignoring generated files. label Dec 3, 2020
fakeClient := newFakeClient(g, machines["one"], machines["two"], machines["three"])

r := &KubeadmControlPlaneReconciler{
Log: log.Log,
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Note, I had to add this to avoid an NPE in preflightChecks constructing the logger

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detiber commented Dec 3, 2020

/lgtm

@k8s-ci-robot k8s-ci-robot added the lgtm "Looks good to me", indicates that a PR is ready to be merged. label Dec 3, 2020
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/approve

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[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: fabriziopandini

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@k8s-ci-robot k8s-ci-robot added the approved Indicates a PR has been approved by an approver from all required OWNERS files. label Dec 3, 2020
@k8s-ci-robot k8s-ci-robot merged commit a74685e into kubernetes-sigs:release-0.3 Dec 3, 2020
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approved Indicates a PR has been approved by an approver from all required OWNERS files. area/control-plane Issues or PRs related to control-plane lifecycle management cncf-cla: yes Indicates the PR's author has signed the CNCF CLA. kind/bug Categorizes issue or PR as related to a bug. lgtm "Looks good to me", indicates that a PR is ready to be merged. priority/critical-urgent Highest priority. Must be actively worked on as someone's top priority right now. size/L Denotes a PR that changes 100-499 lines, ignoring generated files.
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5 participants