Prefixing Prometheus metrics

[adinhodovic]

Bug Report

What is the issue?

How do I prefix Linkerd Prometheus metrics, I've found documentation for linkerd but cannot find any documentation for linkerd2.

[ihcsim]

@adinhodovic For a static prefix, you can update the Prometheus scrape_configs with something like:

metric_relabel_configs:
  - source_labels: [__name__]
    target_label: __name__
    replacement: "prefix_${1}"

For dynamic prefixes, it's better to use labels.

[adinhodovic]

Any plan of prefixing the metrics from the start? Since changing the prefix will force you to manually manage the Grafana dashboards?

[ihcsim]

It's not high on the priority list at the moment. If this is an important use case for you, feel free to submit a feature request via GH issues. And as always, we love PRs 😉 ❤️.