elastic/elasticsearch

Add columns CAT Shards for _tier_preference and node.roles

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#136,895 创建于 2025年10月21日

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 (8 评论) (0 反应) (0 负责人)Java (76,700 star) (25,882 fork)batch import
:Core/Infra/CAT APIs>enhancementTeam:Core/Infragood first issue

描述

Description

👋 howdy!

Hopefully this avoids the XPack-vs-commercial issues surfaced in https://github.com/elastic/elasticsearch/issues/37499. (XY Problem:) I'd like to streamline investigating assigned shard allocation issues related to ILM. As part of flow after https://github.com/elastic/elasticsearch/pull/99612 or Health Report telling you indices are flagged stagnant on migrations.

As part of this, I'd like if CAT Shards would report columns

In practice, I usually flag via an aggregated view and then review a table of what'd be the above similar output. For example when cold backs up warm backs up hot:

TIA!

贡献者指南

技术栈
java
领域
backendapi
议题类型
feature
难度面向新贡献者的预计实现难度，1 表示很小改动，5 表示专家级工作。
3
预计时间有经验贡献者完成调查、实现、测试并准备 pull request 的粗略时间范围。
1-3 hours
活动状态议题当前的可参与程度：新鲜、活跃、陈旧、阻塞或等待维护者输入。
fresh
清晰度议题是否清楚说明期望改动、验收标准和下一步。
mostly clear
前置要求
Familiarity with Elasticsearch CAT APIBasic knowledge of Java and Elasticsearch codebase
新手友好度1-100 的估计分数，表示该议题对首次贡献者的友好程度。
60
研究方向
The issue requests adding two columns (tier preference and node.roles) to the CAT shards API response. Look at the CAT shards action implementation, likely in the 'cat' module. The response format is defined in a class like RestCatShardsAction or similar. Adding columns requires updating the response builder and possibly the parsing logic. Check existing columns for reference. There is a linked issue #37499 for context on XPack vs commercial nuances. No open PRs; this is a good first task for understanding CAT API internals.