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Eviction: ignore PDBs if pods with DeletionTimestamp #91342

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michaelgugino
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What type of PR is this?

Uncomment only one /kind <> line, hit enter to put that in a new line, and remove leading whitespace from that line:

/kind api-change

/kind bug

/kind cleanup
/kind deprecation
/kind design
/kind documentation
/kind failing-test
/kind feature
/kind flake

What this PR does / why we need it:
When using the eviction API, if a pod already has
a non-zero DeletionTimestamp, we don't need to check
PDBs as it has already been marked for deletion.

Which issue(s) this PR fixes:

Fixes # #91141

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

Eviction requests for pods that have a non-zero DeletionTimestamp will always succeed

Additional documentation e.g., KEPs (Kubernetes Enhancement Proposals), usage docs, etc.:


@k8s-ci-robot k8s-ci-robot added release-note Denotes a PR that will be considered when it comes time to generate release notes. kind/bug Categorizes issue or PR as related to a bug. size/M Denotes a PR that changes 30-99 lines, ignoring generated files. cncf-cla: yes Indicates the PR's author has signed the CNCF CLA. needs-sig Indicates an issue or PR lacks a `sig/foo` label and requires one. needs-priority Indicates a PR lacks a `priority/foo` label and requires one. needs-ok-to-test Indicates a PR that requires an org member to verify it is safe to test. labels May 21, 2020
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Hi @michaelgugino. Thanks for your PR.

I'm waiting for a kubernetes member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

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@michaelgugino michaelgugino force-pushed the evict-deleted-ok branch 2 times, most recently from 0ac0b68 to 7343828 Compare May 22, 2020 01:31
@michaelgugino michaelgugino changed the title Eviction: always success pods with DeletionTimestamp Eviction: ignore PDBs if pods with DeletionTimestamp May 22, 2020
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/sig apps

@k8s-ci-robot k8s-ci-robot added sig/apps Categorizes an issue or PR as relevant to SIG Apps. and removed needs-sig Indicates an issue or PR lacks a `sig/foo` label and requires one. labels May 22, 2020
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/ok-to-test

@k8s-ci-robot k8s-ci-robot added ok-to-test Indicates a non-member PR verified by an org member that is safe to test. and removed needs-ok-to-test Indicates a PR that requires an org member to verify it is safe to test. labels May 22, 2020
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/retest

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@michaelgugino
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/retest

@k8s-ci-robot k8s-ci-robot added the needs-rebase Indicates a PR cannot be merged because it has merge conflicts with HEAD. label May 31, 2020
When using the eviction API, if a pod already has
a non-zero DeletionTimestamp, we don't need to check
PDBs as it has already been marked for deletion.
@k8s-ci-robot k8s-ci-robot added size/S Denotes a PR that changes 10-29 lines, ignoring generated files. and removed size/M Denotes a PR that changes 30-99 lines, ignoring generated files. needs-rebase Indicates a PR cannot be merged because it has merge conflicts with HEAD. labels Jun 2, 2020
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/retest

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mortent commented Jun 7, 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 Jun 7, 2020
@michaelgugino
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/retest

@nikhita
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nikhita commented Jul 9, 2020

/retest

/assign @liggitt
for approval

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liggitt commented Jul 9, 2020

/lgtm
/approve
/retest

@liggitt liggitt added this to the v1.19 milestone Jul 9, 2020
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[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: liggitt, michaelgugino

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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 Jul 9, 2020
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/test pull-kubernetes-typecheck

@michaelgugino
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/test pull-kubernetes-integration

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/retest

@k8s-ci-robot k8s-ci-robot merged commit dd649bb into kubernetes:master Jul 9, 2020
hasheddan added a commit to hasheddan/kubernetes that referenced this pull request Jul 11, 2020
In kubernetes#91342 attempting to evict a Pod with a DeletionTimestamp caused
checking of PDBs to be ignored due to the fact that a Pod scheduled for
deletion should not be factored into a disruption budget. However, PDB
eviction tests currently will sometimes select a Pod already scheduled
for deletion, expecting that attempting to evict it will conflict with
the PDB. This updates those tests to make sure a Pod with deletion
timestamp is not selected for eviction when it is intended to violate a
PDB.

Signed-off-by: hasheddan <[email protected]>
tnozicka pushed a commit to tnozicka/kubernetes that referenced this pull request Jul 28, 2020
…heduled for deletion

In kubernetes#91342 attempting to evict a Pod with a DeletionTimestamp caused
checking of PDBs to be ignored due to the fact that a Pod scheduled for
deletion should not be factored into a disruption budget. However, PDB
eviction tests currently will sometimes select a Pod already scheduled
for deletion, expecting that attempting to evict it will conflict with
the PDB. This updates those tests to make sure a Pod with deletion
timestamp is not selected for eviction when it is intended to violate a
PDB.

Signed-off-by: hasheddan <[email protected]>
sharadg pushed a commit to sharadg/kubernetes that referenced this pull request Oct 23, 2020
In kubernetes#91342 attempting to evict a Pod with a DeletionTimestamp caused
checking of PDBs to be ignored due to the fact that a Pod scheduled for
deletion should not be factored into a disruption budget. However, PDB
eviction tests currently will sometimes select a Pod already scheduled
for deletion, expecting that attempting to evict it will conflict with
the PDB. This updates those tests to make sure a Pod with deletion
timestamp is not selected for eviction when it is intended to violate a
PDB.

Signed-off-by: hasheddan <[email protected]>
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6 participants