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fix deletion handling for inconsistently/wrongly disappeared source object #177

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merged 1 commit into from
May 17, 2021

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MartinWeindel
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What this PR does / why we need it:
On startup of the source controller, we saw inconsistent results from the client lister. A source object has disappeared from the list results, although it was not deleted and still existing. As a consequence the slave DNS entry was deleted and recreated some seconds later. But because of negative caching, secondary DNS server did not find the DNS record for a much longer time.

A bug was fixed with apimachinery v0.18.7 Kube-apiserver: fixed a bug returning inconsistent results from list requests which set a field or label selector and set a paging limit. As this component used version v0.18.6, this could be the root cause.
The K8s dependencies have been updated to v0.18.18.
Additionally we added some safeguard to the Deleted reconciliation of the source object.

Which issue(s) this PR fixes:
Fixes #

Special notes for your reviewer:

Release note:

updated K8s dependencies to v0.18.18 to fix deletion handling for inconsistently/wrongly disappeared source object

@gardener-robot gardener-robot added needs/review Needs review size/s Size of pull request is small (see gardener-robot robot/bots/size.py) labels May 14, 2021
@gardener-robot-ci-2 gardener-robot-ci-2 added the reviewed/ok-to-test Has approval for testing (check PR in detail before setting this label because PR is run on CI/CD) label May 14, 2021
@gardener-robot-ci-1 gardener-robot-ci-1 added needs/ok-to-test Needs approval for testing (check PR in detail before setting this label because PR is run on CI/CD) and removed reviewed/ok-to-test Has approval for testing (check PR in detail before setting this label because PR is run on CI/CD) labels May 14, 2021
@mandelsoft mandelsoft merged commit ccdd5d6 into master May 17, 2021
@mandelsoft mandelsoft deleted the source-deleted-doublecheck branch May 17, 2021 08:33
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5 participants