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lens/troubleshooting/custom-prometheus.md
2019-12-03 14:12:00 +02:00

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# Using Custom Prometheus
When using custom prometheus with Lens app, Lens expects certain things for prometheus rules and labels. Below is listed the changes required to see metrics properly.
## kube-prometheus
1. To see node metrics properly, please add
```
- action: replace
regex: (.*)
replacement: $1
sourceLabels:
- __meta_kubernetes_pod_node_name
targetLabel: kubernetes_node
```
relabeling to `node-exporter` servicemonitor crd (for example `kubectl edit -n monitoring servicemonitors node-exporter`).
2. To see cluster's pod usage on cluster overview properly, please add `metricsRelabeling` to `kubelet` service monitor (`kubectl edit -n monitoring servicemonitors kubelet`)
```
metricRelabelings:
- action: replace
sourceLabels:
- node
targetLabel: instance
```
## Helm chart
1. To see cpu metrics properly, please set value of `server.global.scrape_timeout` less than 1 minute, for example
```
helm upgrade --set server.global.scrape_interval=30s prometheus stable/prometheus
```