Install metric server in kubernetes

WHY?
– Get node CPU/RAM usages
– Can create Horizontal Pod Autoscaler (HPA)
– Light weight

git clone https://github.com/kubernetes-sigs/metrics-server.git

• Edit metrics-server/manifests/base/deployment.yaml and add below lines to args

args:
          - --cert-dir=/tmp
          - --secure-port=4443
          - --kubelet-preferred-address-types=InternalIP,Hostname,InternalDNS,ExternalDNS,ExternalIP
          - --kubelet-use-node-status-port #Deprecated metrics-server:v0.3.7
          - --kubelet-insecure-tls

kubectl apply -f metrics-server/manifests/base

• To get node metrics run kubectl get top node