Kubernetes Metrics Server on Raspberry Pi 3 Model B (ARM v7)

Metrics Server exposes core Kubernetes metrics via metrics API. Without Metrics Server,Horizontal Pod Autoscale (HPA) and kubectl top command will not work.

Github did not provide deployment yaml file for Raspberry Pi cluster, so I have to change original deploy/kubernetes/metrics-server-deployment.yaml

1. replace amd64 with arm (under containers and nodeSelectors section)

2. modify args into: (two extra lines)

        args:

          - --cert-dir=/tmp

          - --secure-port=4443

          - --kubelet-insecure-tls ###get ride error: http: TLS handshake error

          - --kubelet-preferred-address-types=InternalIP ### unable to fully scrape metrics from source kubelet

3. deploy Metrics Server and all the rest manifest yaml files in the same directory , and wait for a while to get rid off error:unable to fetch node metrics for node