One other thing: to do this readily, you need to use "meaningful instance
labels":
https://www.robustperception.io/controlling-the-instance-label
That is, rather than
node_info{instance="foo:9100"}
process_info{instance="foo:9256"}
you need to record
node_info{instance="foo"}
process_info{instance="foo"}
This is easy to arrange using relabelling at scrape time. Set the instance
label to what you want, and then set __address__ to the address:port.
Example:
- job_name: node
scrape_interval: 1m
scrape_timeout: 50s
file_sd_configs:
- files:
- /etc/prometheus/targets.d/node_targets.yml # don't include the
port number in here
metrics_path: /metrics
relabel_configs:
- source_labels: [__address__]
target_label: instance
- source_labels: [__address__]
target_label: __address__
replacement: '${1}:9100'
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