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64 lines
1.7 KiB
Markdown
64 lines
1.7 KiB
Markdown
# Using Custom Prometheus
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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.
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## kube-prometheus
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### Manual
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1. To see node metrics properly, please add
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```
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- action: replace
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regex: (.*)
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replacement: $1
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sourceLabels:
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- __meta_kubernetes_pod_node_name
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targetLabel: kubernetes_node
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```
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relabeling to `node-exporter` servicemonitor crd (for example `kubectl edit -n monitoring servicemonitors node-exporter`).
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2. To see cluster's pod usage on cluster overview properly, please add `metricRelabelings` to `kubelet` service monitor (`kubectl edit -n monitoring servicemonitors kubelet`)
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```
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metricRelabelings:
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- action: replace
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sourceLabels:
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- node
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targetLabel: instance
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```
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### Jsonnet
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The required label replacements are bundled in [jsonnet/lens/custom-prometheus](../jsonnet/lens/custom-prometheus.jsonnet). To install it copy the file or use
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[Jsonnet Bundler](https://github.com/jsonnet-bundler/jsonnet-bundler).
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```bash
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jb init && jb install https://github.com/lensapp/lens/jsonnet/lens@master
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```
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When the installation was successful include it into your definitions. Using the [example](https://github.com/coreos/kube-prometheus#compiling)
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of kube-prometheus, e.g.:
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```
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local kp =
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(import 'kube-prometheus/kube-prometheus.libsonnet') +
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(import 'lens/custom-prometheus.jsonnet') +
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{
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_config+:: {
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namespace: 'monitoring',
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},
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};
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...
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```
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## Helm chart
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1. To see cpu metrics properly, please set value of `server.global.scrape_timeout` less than 1 minute, for example
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```
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helm upgrade --set server.global.scrape_interval=30s prometheus stable/prometheus
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```
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