Hi Everyone,
I need to handle a scenario where I add a label to ingested metrics, but
only if the label does not already exist in the collected data. If the
label is present in a metric, it should remain unchanged.
For example, given a set of metrics:
custom_metrics_from_server{ source="server1.example.com",status="run" }
3213
custom_metrics_from_server{ source="server1.example.com",status="pend" }
3215
When additional metrics are collected from a node exporter, some will
already have a "source=" label, while others will not:
custom_metrics_from_server{ source="server1.example.com",status="run" }
3213
custom_metrics_from_server{ source="server1.example.com",status="pend" }
3215
node_cooling_device_max_state{name="7",type="Processor"} 0
To ensure that all metrics contain the "source=" label without overriding
existing ones, I figured the following approach using honor_labels and
relabel_configs:
honor_labels: true
relabel_configs:
- source_labels: [ _address_ ]
regex: "(.*):(.*)"
target_label: "source"
replacement: '${1}'
Is this the best way to handle this, or is there a more optimal approach?
Please advice.
Thanks!
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