feat: Add script to deploy k8s metrics-server in member cluster

hack/deploy-k8s-metrics-server.sh

@@ -0,0 +1,46 @@
+#!/bin/bash
+
+set -o errexit
+set -o nounset
+
+_tmp=$(mktemp -d)
+
+function usage() {
+  echo "This script will deploy metrics-server in member clusters."
+  echo "Usage: hack/deploy-k8s-metrics-server.sh <MEMBER_CLUSTER_KUBECONFIG> <MEMBER_CLUSTER_NAME>"
+  echo "Example: hack/deploy-k8s-metrics-server.sh ~/.kube/members.config member1"
+}
+
+cleanup() {
+  rm -rf "${_tmp}"
+}
+trap "cleanup" EXIT SIGINT
+
+if [[ $# -ne 2 ]]; then
+  usage
+  exit 1
+fi
+
+# check kube config file existence
+if [[ ! -f "${1}" ]]; then
+  echo -e "ERROR: failed to get kubernetes config file: '${1}', not existed.\n"
+  usage
+  exit 1
+fi
+MEMBER_CLUSTER_KUBECONFIG=$1
+
+# check context existence
+if ! kubectl config get-contexts "${2}" --kubeconfig="${MEMBER_CLUSTER_KUBECONFIG}" > /dev/null 2>&1;
+then
+  echo -e "ERROR: failed to get context: '${2}' not in ${MEMBER_CLUSTER_KUBECONFIG}. \n"
+  usage
+  exit 1
+fi
+MEMBER_CLUSTER_NAME=$2
+
+# get deploy yaml
+wget https://github.com/kubernetes-sigs/metrics-server/releases/download/v0.6.3/components.yaml -O "${_tmp}/components.yaml"
+sed -i'' -e 's/args:/args:\n        - --kubelet-insecure-tls=true/' "${_tmp}/components.yaml"
+
+# deploy metrics-server in member cluster
+kubectl --kubeconfig="${MEMBER_CLUSTER_KUBECONFIG}" --context="${MEMBER_CLUSTER_NAME}" apply -f "${_tmp}/components.yaml"