scripts/k8s_master.sh

   1 #!/bin/bash -ex
   2
   3 # For host setup as Kubernetes master
   4 MGMT_IP=$1
   5 POD_NETWORK_CIDR=${2:-192.168.0.0/16}
   6 SERVICE_CIDR=${3:-172.16.1.0/24}
   7
   8 if [ -z "${MGMT_IP}" ]; then
   9   echo "Please specify a management IP!"
  10   exit 1
  11 fi
  12
  13 if ! kubectl get nodes; then
  14   sudo kubeadm config images pull
  15   sudo kubeadm init \
  16     --pod-network-cidr="${POD_NETWORK_CIDR}" \
  17     --apiserver-advertise-address="${MGMT_IP}" \
  18     --service-cidr="${SERVICE_CIDR}"
  19
  20   if [ "$(id -u)" = 0 ]; then
  21     echo "export KUBECONFIG=/etc/kubernetes/admin.conf" | \
  22       tee -a "${HOME}/.profile"
  23     # shellcheck disable=SC1090
  24     source "${HOME}/.profile"
  25   else
  26     mkdir -p "${HOME}/.kube"
  27     sudo cp -i /etc/kubernetes/admin.conf "${HOME}/.kube/config"
  28     sudo chown "$(id -u)":"$(id -g)" "${HOME}/.kube/config"
  29   fi
  30 fi