Custom Metrics Router

Router to support multiple metrics adapters in Kubernetes

Running the router

Build and push the image

IMAGE=custom-metrics-router VERSION=v0.1.0 make build.push

Here IMAGE should be the set to an image name which to which location the built image will be subsequently pushed. VERSION can also be set accordingly, or a value will be generated from the git commit.

Deploy the router

kubectl create ns custom-metrics
kubectl apply -f deploy/metricsrouter.io_custommetricsssources.yaml
kubectl apply -f deploy/rbac.yaml

In the deploy/deployment.yamlfile modify the image field with the value of the docker image from the previous step.

kubectl apply -f deploy/deployment.yaml
kubectl apply -f deploy/service.yaml

The next step registers the router as the default API service for custom.metrics.k8s.io and external.metrics.k8s.io. Before this step ensure that there is no existing service for that API group or the existing service register has lower priority.

kubectl apply -f deploy/apiservice.yaml

Modify the file deploy/example.yaml to point to an existing custom or external metrics provider

Testing the metrics router.

kubectl get --raw "/apis/custom.metrics.k8s.io/v1beta2/"
kubectl get --raw "/apis/external.metrics.k8s.io/v1beta2/"