CODEWITHSUNDEEP
configurationyamlprometheusgrafana
ACaps
ACaps

Reputation: 117

Replace "exported_instance" label value from Prometheus

this label (exported_instance) is always added in every metric automatically.

myMetric{exported_instance="HP-probook", instance="ss:9966", job="ss"}

How can I replace during scrape time from prometheus.yml? Is it possibile? Or I need to add new one?

relabel_configs:
  - source_labels: [__address__]
   regex: 'HP-probook'
    target_label: new_label
    replacement: 'HP-probook-2'

I understand that it is added automatically and for this reason it is not clear to me if I can replace it without adding another one.

Thanks Alen

Upvotes: 3

Views: 3988

Answers (1)

anemyte
anemyte

Reputation: 20226

job and instance labels are somewhat special with Prometheus. instance comes from the __address__ label and represents a host and port from which the metric came.

You get metrics with exported_ prefix if the collected data already have one of the predefined labels. In other words, exported_instance is the instance label in your exporter.

The best way around this is to avoid using any of the special labels in the exporter. If for some reason it is mandatory to use one of these labels, you can perform relabeling at the metric_relabel_configs:

metric_relabel_configs:
# copy exported_instance value to label foo
- source_labels: [exported_instance]
  target_label: foo
# remove exported_instance label
- action: labeldrop
  regex: ^exported_instance$

Remember that you cannot use relabel_configs to deal with labels that come from an exporter, you need metric_relabel_configs for this. Here is another my answer with the explanation: prometheus relabel_config drop action not working

Upvotes: 3

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