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We have a hierachical prometheus setup with some server scraping others. We'd like to have some servers scrape all metrics from others.
Currently we try to use match[]="{__name__=~".*"}" as a metric selector, but this gives the error parse error at char 16: vector selector must contain at least one non-empty matcher.
Is there a way to scrape all metrics from a remote prometheus without listing each (prefix) as a match selector?
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Prometheus federation is a Prometheus server that can scrape data from other Prometheus servers. It supports hierarchical federation, which in our case resembles a tree.
In Prometheus terms, an endpoint you can scrape is called an instance, usually corresponding to a single process. A collection of instances with the same purpose, a process replicated for scalability or reliability for example, is called a job.
Yes, you can do: match[]="{__name__=~".+"}" (note the + instead of * to not match the empty string).
Prometheus requires at least one matcher in a label matcher set that doesn't match everything.
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