Add root checks and given an appropriate message if not running as root

setup-docker.sh

@@ -2,6 +2,11 @@
 # script that runs 
 # https://kubernetes.io/docs/setup/production-environment/container-runtime
 
+if [ $(id -u) != 0 ]; then
+  echo "Please run as root or use sudo."
+  exit 1
+fi
+
 yum install -y vim yum-utils device-mapper-persistent-data lvm2
 yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo
 

setup-kubetools.sh

@@ -2,6 +2,11 @@
 # kubeadm installation instructions as on
 # https://kubernetes.io/docs/setup/production-environment/tools/kubeadm/install-kubeadm/
 
+if [ $(id -u) != 0 ]; then
+  echo "Please run as root or use sudo."
+  exit 1
+fi
+
 cat <<EOF > /etc/yum.repos.d/kubernetes.repo
 [kubernetes]
 name=Kubernetes