How to add labels to Go runtime prometheus metrics?

[cpu...@gmail.com]

The Go runtime exposes various metrics. To collect metrics from multiple servers I'd like to add labels for server name. Is it possible to extend the build-in metrics for this purpose?

Thanks,

Andi

[Brian Candler]

The server name will be added by Prometheus itself as an "instance" label for each target being scraped (or you can manually set the instance label for each target), so in general what you're asking is not necessary.  None of the standard Prometheus exporters include a label for the hostname (e.g. node_exporter, windows_exporter etc).

If there's something special about your situation which means you need to do this, can you explain your use case further?

[cpu...@gmail.com]

Situation here may be a bit specific. Running 2 cloud machines behind reverse proxy. I realise this is per chance if the proxy will hit any of the two, but that would be good enough id I could distinguish their metrics.