You might want to see if https://github.com/prometheus-community/prom-label-proxy provides what you need.
On Tuesday, 1 February 2022 at 21:33:11 UTC [email protected] wrote: > Wow, I really appreciate this. Thanks so much. > > Op dinsdag 1 februari 2022 om 22:05:36 UTC+1 schreef [email protected]: > >> Since rate() is a function, not a metric, you can't pass it to >> parser.ParseMetric() and expect it to work. You need to stick to ParseExpr >> and walk down the entire AST. >> What you need to do is find all instances of parser.VectorSelector, >> which is the data structure that hold time series selectors in queries, and >> append labels there. >> Here's an example: >> https://gist.github.com/prymitive/e021f48cda4744de24bce9c4b523c315 >> >> If you need more example code check >> https://github.com/cloudflare/pint/blob/main/cmd/pint/parse.go >> On Tuesday, 1 February 2022 at 19:47:16 UTC [email protected] wrote: >> >>> Hi everyone, >>> >>> I'm automating a way to modify Grafana Dashboards to our liking. For >>> example to use a public Grafana dashboard and append certain query labels >>> to every query in a dashboard. >>> For this, I figured to use the Prometheus Parser, which works well to >>> some extend for my use-case. However certain 'expressions' (or queries) >>> don't parse that well (or I'm doing it wrong). >>> >>> As a quick draft I have the following code: >>> ------ >>> parsedExpr, _ := parser.ParseExpr(expr) >>> childExprs := parser.Children(parsedExpr) >>> parsedMainMetric, _ := parser.ParseMetric(expr) >>> >>> fmt.Println(parsedMainMetric) >>> for _, childExpr := range childExprs { >>> >>> parsedChildExpr, _ := parser.ParseMetric(childExpr.String()) >>> fmt.Println(parsedChildExpr) >>> } >>> ------ >>> Which works for: >>> >>> > input: "rate(node_disk_io_time_seconds_total{bar=\"foo\"}[2m])", >>> >>> As this gives me the following output: >>> >>> > {__name__="rate"} >>> > {__name__="node_disk_io_time_seconds_total", bar="foo"} >>> >>> However, lets say I change the input to: >>> >>> > input: "rate(node_disk_io_time_seconds_total{bar=\"foo\"}[2m]) > 0", >>> >>> Then it does not exactly go how I expected it to be: >>> >>> > {__name__="rate"} >>> > {__name__="rate"} >>> > {} >>> >>> (obviously this is mainly due to how I wrote my draft code). >>> >>> I have seen https://demo.promlens.com/?l=eF6PYANAlbQ - and I was >>> wondering if someone could give me some pointers on how I should continue >>> (and if this is actually a viable option to update labels). >>> >>> Thanks in advance, >>> >>> Wiard >>> >> -- You received this message because you are subscribed to the Google Groups "Prometheus Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/prometheus-users/fe2e9481-765a-4be9-a76d-e88fc11b9146n%40googlegroups.com.
