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Fix: blackbox_exporter Grafana仪表盘Failed to fetch #145

@ZZYhho

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@ZZYhho

当所有变量为所有,监控实例多,会导致Grafana报错Failed to fetch
根本原因是谷歌浏览器限制2000个字符的get请求导致的,默认所有的这个变量先查询所有的name,再携带查询所有的name作为参数查询instance导致超限报错

  • 解决:需要把name、instance两个变量里的Custom all value改为.*

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