Support Prometheus /graph api

[roidelapluie]

What would you like to be added:

I would be interesting to see if Grafana can expose a Prometheus /graph-compatible endpoint. The endpoint would redirect to Grafana explore.

Why is this needed:

Prometheus can send a graph URL to alertmanager. It would be great if in the alertmanager notifications, we could apply a replaceAll template that switches from Prometheus /graph to grafana /prometheus/graph with e.g. a replaceAll. The user would then be redirected to /explore, with the correct query.

[seb-koch]

Loving the idea! I currently hacked it together right in the receiver configuration by using a set of reReplaceAll calls. Here is a working example where we replace the Prometheus Url with a Grafan Explore call including the Prometheus expression. The base URL has to be encoded as otherwise the link breaks when viewed in the browser (i.e. in Opsgenie).

note: '{{ range .Alerts }}{{ reReplaceAll ".*expr\\=" "https%3A%2F%2Fdomain.tld%2Fgrafana%2Fexplore%3ForgId%3D1%26left%3D%5B%5C%22now-15m%5C%22%2C%5C%22now%5C%22%2C%5C%22Prometheus%5C%22%2C%7B%5C%22exemplar%5C%22%3Atrue%2C%5C%22expr%5C%22%3A%5C%22" .GeneratorURL | reReplaceAll "&g0.tab=1" "%5C%22%7D%5D" }}{{end}}'

[aditya-opsverse]

Hello @seb-koch
I have tried the above solution that you gave. Unfortunately that didn't work. The URL is still broken.
Could you please help me in where I am going wrong?
Thanks

[seb-koch]

Hi, I don't have access to that system anymore unfortunately and thus can't reproduce it. Sorry, that I can't help here.

[ludov04]

Would love to have this

[gelicia]

Hello, as you may have heard, we are transitioning away from using discussions to discuss feature requests. We are migrating this discussion to an issue and closing the discussion. The issue is #82943. Feel free to continue the discussion around this there. Thank you!