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Benjamin P. Jung 3066576382

Signed-off-by: Benjamin P. Jung <headcr4sh@gmail.com>

2020-04-29 18:27:32 +03:00

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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

Manual

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).

To see cluster's pod usage on cluster overview properly, please add metricRelabelings to kubelet service monitor (kubectl edit -n monitoring servicemonitors kubelet)

metricRelabelings:
- action: replace
  sourceLabels:
  - node
  targetLabel: instance

Jsonnet

The required label replacements are bundled in jsonnet/custom-prometheus. To install it copy the file or use Jsonnet Bundler. For jsonnet bundler add the following dependency to your jsonnetfile.json:

{
  "name": "lens",
  "source": {
    "git": {
      "remote": "https://github.com/lensapp/lens",
      "subdir": "jsonnet"
    }
  },
  "version": "master"
}

and run jb install. When the installation was successful include it into your definitions. Using the example of kube-prometheus, e.g.:

local kp =
  (import 'kube-prometheus/kube-prometheus.libsonnet') +
  (import 'lens/custom-prometheus.jsonnet') +
  {
    _config+:: {
      namespace: 'monitoring',
    },
  };
...

Helm chart

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

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