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静态配置中默认label保留目的是什么 #23

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like-inspur opened this issue Feb 18, 2021 · 4 comments
Closed

静态配置中默认label保留目的是什么 #23

like-inspur opened this issue Feb 18, 2021 · 4 comments

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@like-inspur
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查看prometheus的静态配置，除了给指标使用的label外，还有一些默认label和__parm开头的label，保留目的是什么
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@RayHuangCN
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您好，这几个label是用于sidecar识别抓取请求用的，__param的label会被prometheus加到请求参数里，从而传递给sidecar，sidecar用这些参数去配置文件里找到对应的job，利用job里的配置进行实际的采集(例如证书信息)

@like-inspur
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sidecar的拉取不能直接读取静态配置的target吗，你的意思是它必须依赖这些label才能找到对应job和target，从而完成拉取

@RayHuangCN
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因为请求过来的时候，只有url，并不知道是哪个job的抓取请求。

@like-inspur
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嗯，那我再看下sidecar的代码，理解下是怎么使用这些label的

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@like-inspur @RayHuangCN