sed -i "s/ExecStart=\(.*\)/ExecStart=\1 --cri-containerd/" /lib/systemd/system/docker.service
  fi

  apt install -y conntrack vim htop ripgrep dnsutils tree ripgrep build-essential
}

function wait_coredns_available(){
  local interval_time=2
  local coredns_wait_time=300

  # kick the coredns pods to be recreated
  ${KUBECTL} --kubeconfig="${CERT_DIR}/admin.kubeconfig" -n kube-system delete pods -l k8s-app=kube-dns