ci(prow): migrate pingcap/tiflow release-6.5 jobs to target jenkins

[wuhuizuo]

Part of #4960.

Summary

Flip labels.master "1" -> "0" for the jenkins-agent jobs in prow-jobs/pingcap/tiflow/release-6.5-presubmits.yaml so they are scheduled on the to Jenkins.

Part of #4947 / #4942

[ti-chi-bot]

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[ti-chi-bot]

I have already done a preliminary review for you, and I hope to help you do a better job.

Summary
This PR updates the prow job definitions for the pingcap/tiflow release-6.5 branch by changing the labels.master value from "1" to "0" for all jenkins-agent jobs. This effectively migrates these jobs to be scheduled on the target Jenkins environment. The change is straightforward, focused, and consistent across all relevant jobs. The patch is small and clear, with no obvious issues in logic or formatting.

---

Code Improvements

• Clarify the meaning of master label values

  • File: prow-jobs/pingcap/tiflow/release-6.5-presubmits.yaml
  • Lines: All label changes (e.g., lines 11, 24, 39, 54, 69)
  • Issue: The label key master with values "1" or "0" is not self-explanatory. It is unclear what these values mean without external context. This can cause confusion for future maintainers or contributors.
  • Suggestion: Add a brief comment near the label key explaining the semantic meaning of "1" and "0", e.g.:

    labels:
      # master: "0" means schedule on target Jenkins; "1" means old Jenkins
      master: "0"

    This will improve maintainability and clarity.

• Add a top-level comment summarizing the migration purpose

  • File: prow-jobs/pingcap/tiflow/release-6.5-presubmits.yaml
  • Lines: Near the top of the file (e.g., lines 1-5)
  • Issue: The migration purpose is not documented inside the YAML file itself. Having a short note about the migration of jobs to the target Jenkins infrastructure would help future readers understand why these label changes were made.
  • Suggestion: Add a comment like:

    # Migration of release-6.5 presubmit jobs to target Jenkins by flipping labels.master from "1" to "0"

---

Best Practices

• Improve commit message or PR description for clarity

  • File: N/A (PR metadata)
  • Issue: The PR description mentions flipping labels.master from "1" to "0" but does not explain the implications or what "target Jenkins" means. This might confuse reviewers unfamiliar with the infrastructure.
  • Suggestion: Clarify the description, e.g.:

    Flip labels.master from "1" (old Jenkins) to "0" (target Jenkins) for all jenkins-agent jobs in release-6.5 to complete migration to the new Jenkins environment.

• Testing and validation reminder

  • File: N/A
  • Issue: The PR does not mention if any testing or job validation was performed after migration. Since scheduling changes can cause jobs to fail if Jenkins agents are misconfigured, a note on testing would be useful.
  • Suggestion: Ensure appropriate testing is done, and ideally add a comment or PR note confirming all migrated jobs successfully run on the target Jenkins.

---

No critical issues or broken functionality were identified. Overall, the PR is a clean and necessary configuration update. Adding clarifying comments and improving documentation would enhance maintainability and transparency.

[ti-chi-bot]

Jenkins Migration Verification

Migrating jenkins-agent Prow jobs to the to Jenkins (labels.master: 1 -> 0).

• pingcap/tiflow/release-6.5/ghpr_verify
  • status: infra-fail
• pingcap/tiflow/release-6.5/pull_cdc_integration_kafka_test
  • status: failed
• pingcap/tiflow/release-6.5/pull_cdc_integration_mysql_test
  • status: failed
• pingcap/tiflow/release-6.5/pull_dm_compatibility_test
  • status: infra-fail
• pingcap/tiflow/release-6.5/pull_dm_integration_test
  • status: infra-fail

Summary: success=0 submitted=0 failed=2 infra-fail=3 skipped=0 dry-run=0 total=5

[ti-chi-bot]

I have already done a preliminary review for you, and I hope to help you do a better job.

Summary
This PR updates the prow-jobs/pingcap/tiflow/release-6.5-presubmits.yaml configuration to migrate Jenkins jobs from one Jenkins master node (label "master": "1") to a different target Jenkins node (label "master": "0"). The approach is straightforward—flipping the label values for the relevant jobs that use the Jenkins agent. The change is limited to this label update, and the diff is clean and focused.

---

Code Improvements

• Clarify the meaning of master labels in comments or documentation

  • File: prow-jobs/pingcap/tiflow/release-6.5-presubmits.yaml (multiple lines, e.g., lines 11, 24, 39, 54, 69)
  • Issue: The label key master with values "1" or "0" is not self-explanatory. It is not clear what "1" and "0" signify, which could confuse future maintainers.
  • Suggestion: Add a comment near the label definition explaining what these values represent. For example:

    labels:
      # 'master: "1"' means schedule on old Jenkins master node
      # 'master: "0"' means schedule on new target Jenkins master node
      master: "0"

  • This will improve maintainability and reduce potential misconfiguration.

• Verify no other jobs require label changes

  • Since this PR only flips the label in release-6.5-presubmits.yaml, ensure that other related job YAML files (e.g., postsubmits, periodics, or other releases) do not require similar updates. This is not a code fix but a reminder to avoid partial migration that could cause inconsistent behavior.

---

Best Practices

• Testing / Validation

  • It is unclear if there is any CI job or manual process to validate that these jobs are correctly scheduled on the new Jenkins master after the label flip.
  • Suggest adding a note in the PR or repo documentation describing how to verify the migration success, e.g., checking job execution logs or prow dashboard.
  • If possible, add integration tests or dry-run jobs to validate the label change.

• Consistency in comments

  • The comment # need add this. on the decorate: false lines is repeated unchanged. Consider rephrasing or removing it if it no longer applies, or clarify the intent to make it meaningful.
  • For example:

    decorate: false # Decoration disabled because Jenkins agent does not support it yet.

  • This prevents confusion about whether the comment is a TODO or informational.

---

No critical issues or bugs found given the scope of this PR. The changes are minimal and low risk but would benefit from clearer documentation and validation instructions.

[ti-chi-bot]

@wuhuizuo: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
pull-verify-jenkins-migration	fa0330a	link	true	/test pull-verify-jenkins-migration

Full PR test history. Your PR dashboard.

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