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dra: enable adding ReservedFor entries through strategic-merge-patch #122276

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merged 1 commit into from
Jan 24, 2024

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pohly
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@pohly pohly commented Dec 12, 2023

What type of PR is this?

/kind cleanup
/kind api-change

What this PR does / why we need it:

When moving the reservation of a claim for a pod into the PreBind phase in a future PR, multiple different update attempts will be executed concurrently. We want an attempt to succeed if and only if adding the entry passes validation. Without patch strategy and key, strategic-merge-patch replaces the entire ReservedFor instead of adding new entries.

Server-side-apply cannot be used because each attempt may start with a stale ResourceClaim (thus cannot send the entire ReservedFor) and SSA doesn't support merging when using the same manager string. Using different managers (one for each entry) would work, but sounds like a bad hack.

Which issue(s) this PR fixes:

Related-to: #113700

Special notes for your reviewer:

Does this PR introduce a user-facing change?

resource.k8s.io/ResourceClaim (alpha API): the strategic merge patch strategy for the `status.reservedFor` array was changed such that a strategic-merge-patch can add individual entries. This breaks clients using strategic merge patch to update status which rely on the previous behavior (replacing the entire array).

/assign @apelisse

When moving the reservation of a claim for a pod into the PreBind phase in a
future commit, multiple different update attempts will be executed
concurrently. We want an attempt to succeed if and only if adding the entry
passes validation. Without patch strategy and key, strategic-merge-patch
replaces the entire ReservedFor instead of adding new entries.

Server-side-apply cannot be used because each attempt may start with a stale
ResourceClaim (thus cannot send the entire ReservedFor) and SSA doesn't support
merging when using the same manager string. Using different managers (one for
each entry) would work, but sounds like a bad hack.
@k8s-ci-robot k8s-ci-robot added release-note-none Denotes a PR that doesn't merit a release note. kind/cleanup Categorizes issue or PR as related to cleaning up code, process, or technical debt. size/XS Denotes a PR that changes 0-9 lines, ignoring generated files. kind/api-change Categorizes issue or PR as related to adding, removing, or otherwise changing an API labels Dec 12, 2023
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Please note that we're already in Test Freeze for the release-1.29 branch. This means every merged PR will be automatically fast-forwarded via the periodic ci-fast-forward job to the release branch of the upcoming v1.29.0 release.

Fast forwards are scheduled to happen every 6 hours, whereas the most recent run was: Tue Dec 12 10:21:04 UTC 2023.

@k8s-ci-robot k8s-ci-robot added cncf-cla: yes Indicates the PR's author has signed the CNCF CLA. area/code-generation labels Dec 12, 2023
@k8s-ci-robot k8s-ci-robot added sig/api-machinery Categorizes an issue or PR as relevant to SIG API Machinery. do-not-merge/needs-sig Indicates an issue or PR lacks a `sig/foo` label and requires one. needs-triage Indicates an issue or PR lacks a `triage/foo` label and requires one. needs-priority Indicates a PR lacks a `priority/foo` label and requires one. and removed do-not-merge/needs-sig Indicates an issue or PR lacks a `sig/foo` label and requires one. labels Dec 12, 2023
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/triage accepted
/cc

@k8s-ci-robot k8s-ci-robot added triage/accepted Indicates an issue or PR is ready to be actively worked on. and removed needs-triage Indicates an issue or PR lacks a `triage/foo` label and requires one. labels Dec 12, 2023
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apelisse commented Jan 3, 2024

/lgtm
/approve

@k8s-ci-robot k8s-ci-robot added the lgtm "Looks good to me", indicates that a PR is ready to be merged. label Jan 3, 2024
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LGTM label has been added.

Git tree hash: 194c79fa6804a0e8a897a2beafa95db3453e02f6

@pohly
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pohly commented Jan 3, 2024

/assign @msau42

For API approval. It's just a minor tweak which doesn't affect existing code, but blocks further work.

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This PR may require API review.

If so, when the changes are ready, complete the pre-review checklist and request an API review.

Status of requested reviews is tracked in the API Review project.

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pohly commented Jan 19, 2024

/label api-review

@k8s-ci-robot k8s-ci-robot added api-review Categorizes an issue or PR as actively needing an API review. release-note Denotes a PR that will be considered when it comes time to generate release notes. labels Jan 19, 2024
@k8s-ci-robot k8s-ci-robot removed the release-note-none Denotes a PR that doesn't merit a release note. label Jan 24, 2024
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liggitt commented Jan 24, 2024

/lgtm
/approve

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[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: apelisse, liggitt, pohly

The full list of commands accepted by this bot can be found here.

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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 Jan 24, 2024
@k8s-ci-robot k8s-ci-robot merged commit b37c609 into kubernetes:master Jan 24, 2024
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@k8s-ci-robot k8s-ci-robot added this to the v1.30 milestone Jan 24, 2024
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api-review Categorizes an issue or PR as actively needing an API review. approved Indicates a PR has been approved by an approver from all required OWNERS files. area/code-generation cncf-cla: yes Indicates the PR's author has signed the CNCF CLA. kind/api-change Categorizes issue or PR as related to adding, removing, or otherwise changing an API kind/cleanup Categorizes issue or PR as related to cleaning up code, process, or technical debt. lgtm "Looks good to me", indicates that a PR is ready to be merged. needs-priority Indicates a PR lacks a `priority/foo` label and requires one. release-note Denotes a PR that will be considered when it comes time to generate release notes. sig/api-machinery Categorizes an issue or PR as relevant to SIG API Machinery. size/XS Denotes a PR that changes 0-9 lines, ignoring generated files. triage/accepted Indicates an issue or PR is ready to be actively worked on.
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7 participants