Your "targets" under "static_configs" don't include a port number, so they
won't match your regex. Therefore, you can either add :443 to the targets,
or you could do
relabel_configs:
- source_labels: [__address__]
target_label: instance
Your second test config will likely create scraping errors as you'll end up
with duplicate metrics all sharing the same label sets with
{instance="foo"}. But if you make your scrape job have a single target, it
ought to work, and I don't know why it doesn't.
Are you using regular prometheus directly, or via some docker / helm
chart? The problem might be with the latter.
On Tuesday, 13 June 2023 at 13:49:31 UTC+1 Igor Sverkos wrote:
> Hi,
>
> I'd like to have a "instance" label value without ":<port>". This seems to
> be a common task according to
>
> - https://www.robustperception.io/controlling-the-instance-label/
> - https://groups.google.com/g/prometheus-users/c/I4dVtwI5YrM
> -
> https://valyala.medium.com/how-to-use-relabeling-in-prometheus-and-victoriametrics-8b90fc22c4b2#8559
>
> But none of this is working for me.
>
> However, doing it in "metric_relabel_configs" instead works.
>
> Config looks like
>
> scrape_configs:
> - job_name: node-external
> scheme: "https"
> metrics_path: "/exporters/node/metrics"
> static_configs:
> - targets:
> - host1.example.org
> - host2.example.org
> relabel_configs:
> - source_labels: [__address__]
> regex: "([^:]+):.+"
> target_label: "instance"
>
> I even tried without the regex just in case, i.e.
>
> relabel_configs:
> - target_label: "instance"
> replacement: "foo"
>
> but "instance" value will stick to "host1.example.org:443" for example.
>
> If I'll do the relabeling in metric_relabel_configs instead, the shown
> config will work.
>
> I am using prometheus v2.37.8.
>
> Was this changed in the recent past? I cannot believe that all the
> documentations and blog postings are wrong. Am I missing something?
>
>
> --
> Igor
>
>
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