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Add protocol buffer generation automation to maintain sync with upstream Kubernetes#4380

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k8s-ci-robot merged 3 commits intomasterfrom
copilot/fix-protobuf-automation-issue
Nov 12, 2025
Merged

Add protocol buffer generation automation to maintain sync with upstream Kubernetes#4380
k8s-ci-robot merged 3 commits intomasterfrom
copilot/fix-protobuf-automation-issue

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Copilot AI commented Nov 11, 2025 •
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Protocol buffer files were manually maintained and became outdated, missing fields like resources in V1.PodSpec that exist in both upstream Kubernetes proto definitions and OpenAPI-generated models.

Changes

Automation Script

  • scripts/update-proto.sh: Generates proto files from kubernetes-client/gen, parameterized by KUBERNETES_BRANCH environment variable

CI/CD Integration

  • .github/workflows/generate.yml: Added "Generate Proto" step between OpenAPI generation and patches, using same Kubernetes branch parameter

Documentation

  • proto/README.md: Documents automated workflow trigger and manual script usage

Generated Files

  • Regenerated all 37 proto files from upstream Kubernetes master branch

Result

// Previously failed - resources field was missing
V1.PodSpec podSpec = V1.PodSpec.newBuilder()
    .setResources(V1.ResourceRequirements.newBuilder()
        .putLimits("cpu", quantity)
        .build())
    .build();

// Now works - field 40 present with proper accessors
podSpec.hasResources();    // ✓
podSpec.getResources();    // ✓

Proto and OpenAPI models now maintain consistency automatically on each generation run.

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

  • repository.sonatype.org
    • Triggering command: /usr/lib/jvm/temurin-17-jdk-amd64/bin/java -classpath /home/REDACTED/work/java/java/.mvn/wrapper/maven-wrapper.jar -Dmaven.multiModuleProjectDirectory=/home/REDACTED/work/java/java org.apache.maven.wrapper.MavenWrapperMain clean compile -pl proto -am (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

Original prompt

This section details on the original issue you should resolve

<issue_title>Protocol Buffer support needs automation to keep it in sync.</issue_title>
<issue_description>Describe the bug
The generated protobuf specification is inconsistent with the non protobuf classes.
The resources field is missing from the

V1.PodSpec.newBuilder()
   .addResource(...) //missing

class V1PodSpec{
    @SerializedName("resources")
    @Nullable
    private V1ResourceRequirements resources;
}

original golang specification

// +featureGate=PodLevelResources
	// +optional
	Resources *ResourceRequirements `json:"resources,omitempty" protobuf:"bytes,40,opt,name=resources"`

To Reproduce
Observe the generated protobuf code
https://github.com/kubernetes-client/java/raw/refs/tags/v25.0.0/proto/src/main/java/io/kubernetes/client/proto/V1.java

vs

https://github.com/kubernetes-client/java/blob/v25.0.0/kubernetes/src/main/java/io/kubernetes/client/openapi/models/V1PodSpec.java

Expected behavior
The resource shall be present in the protobuf variant too
</issue_description>

<agent_instructions>Please add automation similar to the generate automation for generating new code, but instead generate protocol buffers. You should use the https://github.com/kubernetes-client/gen repository.</agent_instructions>

Comments on the Issue (you are @copilot in this section)

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@k8s-ci-robot k8s-ci-robot added do-not-merge/work-in-progress Indicates that a PR should not merge because it is a work in progress. cncf-cla: yes Indicates the PR's author has signed the CNCF CLA. size/XS Denotes a PR that changes 0-9 lines, ignoring generated files. labels Nov 11, 2025
@k8s-ci-robot k8s-ci-robot added size/L Denotes a PR that changes 100-499 lines, ignoring generated files. and removed size/XS Denotes a PR that changes 0-9 lines, ignoring generated files. labels Nov 11, 2025
@k8s-ci-robot k8s-ci-robot added size/XXL Denotes a PR that changes 1000+ lines, ignoring generated files. and removed size/L Denotes a PR that changes 100-499 lines, ignoring generated files. labels Nov 11, 2025
Copilot AI changed the title [WIP] Fix Protocol Buffer support to sync resources field Add protocol buffer generation automation to maintain sync with upstream Kubernetes Nov 11, 2025
Copilot AI requested a review from brendandburns November 11, 2025 04:56
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brendandburns commented Nov 12, 2025

/ok-to-test

@k8s-ci-robot k8s-ci-robot added the ok-to-test Indicates a non-member PR verified by an org member that is safe to test. label Nov 12, 2025
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brendandburns commented Nov 12, 2025

/lgtm
/approve

@k8s-ci-robot k8s-ci-robot added lgtm "Looks good to me", indicates that a PR is ready to be merged. approved Indicates a PR has been approved by an approver from all required OWNERS files. labels Nov 12, 2025
@brendandburns brendandburns removed the do-not-merge/work-in-progress Indicates that a PR should not merge because it is a work in progress. label Nov 12, 2025
@brendandburns brendandburns marked this pull request as ready for review November 12, 2025 23:06
brendandburns
brendandburns approved these changes Nov 12, 2025
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/lgtm
/approve

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k8s-ci-robot commented Nov 12, 2025

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: brendandburns, Copilot

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@k8s-ci-robot k8s-ci-robot merged commit 8bce89e into master Nov 12, 2025
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Protocol Buffer support needs automation to keep it in sync.

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