Do we have a way to get host names in metrics scrapped in Docker swarm

[saiharshitachava]

I am running node exporter as a global service in Docker swarm and I would like to get the hostnames in metrics scrapped using prometheus.

I'm currently using the A protocol in prometheus.yml which is giving me the container IP's .But I would need the hostnames of the instances as I have many hosts to monitor

I currently see them as below.

up{instance="10.0.33.243:8080",job="cadvisor_eng",monitor="codelab-monitor"}	1
up{instance="10.0.33.244:9100",job="node-exporter_eng",monitor="codelab-monitor"}

I would need hostnames instead of 10.0.33.243,10.0.33.244

Any help?

[simonpasquier]

I suppose that you're using the DNS service discovery. You could use relabeling with __meta_dns_name provided that every target identifies uniquely by hostname + job.

relabel_configs:
- source_labels: [__meta_dns_name]
  action: replace
  target_label: instance

See also https://www.robustperception.io/controlling-the-instance-label

I'm closing it for now. If you have further questions, please use our user mailing list, which you can also search.