Revision as of 02:13, 15 October 2020

External

The Prometheus adapter is a Kubernetes Aggregation Layer extension.

https://github.com/prometheus-community/helm-charts/tree/main/charts/prometheus-adapter

The adapter will be installed in the same namespace as Prometheus.

helm repo add prometheus-community https://prometheus-community.github.io/helm-charts
helm search repo prometheus-community

helm install -n prometheus prometheus-adapter prometheus-community/prometheus-adapter -f ./prometheus-adapter-overlay.yaml:

See Configuration below for prometheus-adapter-overlay.yaml.

Test installation:

kubectl get --raw /apis/custom.metrics.k8s.io/v1beta1 | jq

{
  "kind": "APIResourceList",
  "apiVersion": "v1",
  "groupVersion": "custom.metrics.k8s.io/v1beta1",
  "resources": []
}

https://github.com/prometheus-community/helm-charts/tree/main/charts/prometheus-adapter#configuration

Use the following prometheus-adapter-overlay.yaml:

helm show values prometheus-community/prometheus-adapter > ~/tmp/prometheus-adapter-overlay.yaml

Increase log level when installing the chart.

tail the logs, Prometheus connection refused is reported there.

@@ Line 14: / Line 14: @@
 {{External|https://github.com/prometheus-community/helm-charts/tree/main/charts/prometheus-adapter}}
-[[Prometheus_Installation_with_Helm#Install|Install Prometheus first]]. Then:
+[[Prometheus_Installation_with_Helm#Install|Install Prometheus first]].
+The adapter will be installed in the same namespace as Prometheus.
 <syntaxhighlight lang='bash'>
-kubectl create ns prometheus-adapter
 helm repo add prometheus-community https://prometheus-community.github.io/helm-charts
 helm search repo prometheus-community
+</syntaxhighlight>
-helm install -n prometheus-adapter prometheus-adapter prometheus-community/prometheus-adapter -f .../prometheus-adapter-overlay.yaml:
+<syntaxhighlight lang='bash'>
+helm install -n prometheus prometheus-adapter prometheus-community/prometheus-adapter -f ./prometheus-adapter-overlay.yaml:
 </syntaxhighlight>