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You would probably be looking for something like Thanos if you want to monitor multiple clusters at once. https://thanos.io/ Although you could configure Prometheus to scrape metrics from things outside of your cluster. Rancher is just installing the regular Prometheus stack. https://github.com/prometheus-operator/kube-prometheus

darn, it's not practical to just configure prom to scrape other clusters?

Sorry for the late response here. You can totally configure the Prometheus to scrape other clusters. Since the Rancher Monitoring is really just kube-prometheus, you can set scrape targets to anything you want. It's not too bad.

Even I'm looking for the same option, untill

Rancher v2.5

it was pretty straight forward under

cattle-monitoring-system

namespace

we have

Secrets

where

additional_scrape_config.yaml

file was present where we can add the target nodes which prometheus can scrape the endpoint

/metrics

. But in

Rancher v2.7

I'm really finding it hard to locate the scrape config file and not sure how to configure my target nodes in order to scrape the metrics