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pd-ctl: add notice for member delete (#21374)#21386

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ti-chi-bot[bot] merged 4 commits intopingcap:release-8.1from
ti-chi-bot:cherry-pick-21374-to-release-8.1
Jul 14, 2025
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pd-ctl: add notice for member delete (#21374)#21386
ti-chi-bot[bot] merged 4 commits intopingcap:release-8.1from
ti-chi-bot:cherry-pick-21374-to-release-8.1

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This is an automated cherry-pick of #21374

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@ti-chi-bot ti-chi-bot added lgtm needs-1-more-lgtm Indicates a PR needs 1 more LGTM. ONCALL Relates to documentation oncall. size/XS Denotes a PR that changes 0-9 lines, ignoring generated files. type/cherry-pick-for-release-8.1 This PR is cherry-picked to release-8.1 from a source PR. type/enhancement The issue or PR belongs to an enhancement. labels Jul 14, 2025
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Summary of Changes

Hello @ti-chi-bot, I'm Gemini Code Assist1! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request updates the pd-control.md documentation to include an important safety notice for the pd-ctl member delete command. The change aims to prevent potential issues in production environments by guiding users to the correct and recommended methods for removing PD nodes.

Highlights

  • Documentation Update: Added a critical warning note to the pd-ctl member delete command documentation. This note explicitly advises users NOT to use this command to remove PD nodes in a production environment.
  • Guidance for Production Environments: The added note provides direct links to the recommended procedures for safely scaling down PD nodes in production, specifically referencing 'Scale in a TiDB/PD/TiKV cluster' and 'Manually Scale TiDB on Kubernetes' documentation.
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Oreoxmt commented Jul 14, 2025

/approve

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ti-chi-bot bot commented Jul 14, 2025

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: Oreoxmt

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@ti-chi-bot ti-chi-bot bot added the approved label Jul 14, 2025
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Code Review

This pull request adds an important warning to the pd-ctl documentation regarding the member delete command. A suggestion has been made to refine the wording of the warning for improved clarity and adherence to technical writing practices.

Comment on lines +444 to +446
> **Note:**
>
> **DO NOT** use the `member delete` command to remove PD nodes in a production environment. To remove a PD node, see [Scale in a TiDB/PD/TiKV cluster](/scale-tidb-using-tiup.md#scale-in-a-tidbpdtikv-cluster) and [Manually Scale TiDB on Kubernetes](https://docs.pingcap.com/tidb-in-kubernetes/stable/scale-a-tidb-cluster/).
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low

To improve the clarity and flow of this note, I suggest the following changes:

  • Use sentence case (Do not instead of **DO NOT**) for a more standard warning tone.
  • Connect the two sentences with Instead to improve the logical flow.
  • Use or instead of and because the linked documents describe alternative methods for different environments (TiUP vs. Kubernetes).
  • Use refer to instead of see for a slightly more formal tone.1

Style Guide References

Suggested change
> **Note:**
>
> **DO NOT** use the `member delete` command to remove PD nodes in a production environment. To remove a PD node, see [Scale in a TiDB/PD/TiKV cluster](/scale-tidb-using-tiup.md#scale-in-a-tidbpdtikv-cluster) and [Manually Scale TiDB on Kubernetes](https://docs.pingcap.com/tidb-in-kubernetes/stable/scale-a-tidb-cluster/).
> **Note:**
>
> Do not use the `member delete` command to remove PD nodes in a production environment. Instead, to remove a PD node, refer to [Scale in a TiDB/PD/TiKV cluster](/scale-tidb-using-tiup.md#scale-in-a-tidbpdtikv-cluster) or [Manually Scale TiDB on Kubernetes](https://docs.pingcap.com/tidb-in-kubernetes/stable/scale-a-tidb-cluster/).

Footnotes

  1. The documentation should prioritize clarity, simplicity, completeness, and readability. (link)

@ti-chi-bot ti-chi-bot bot merged commit 167f821 into pingcap:release-8.1 Jul 14, 2025
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