Install kubelet, kubeadm, docker, kubectl and kubernetes-cni

1. Install Yum Repo

cat <<EOF > /etc/yum.repos.d/kubernetes.repo
[kubernetes]
name=Kubernetes
baseurl=http://yum.kubernetes.io/repos/kubernetes-el7-x86_64
enabled=1
gpgcheck=1
repo_gpgcheck=1
gpgkey=https://packages.cloud.google.com/yum/doc/yum-key.gpg
        https://packages.cloud.google.com/yum/doc/rpm-package-key.gpg
EOF 

2. Disable SELinux

setenforce 0 

3. Install from yum

yum install -y docker kubelet kubeadm kubectl kubernetes-cni 

4. Enable docker and kubelet

systemctl enable docker && systemctl start docker
systemctl enable kubelet && systemctl start kubelet 

5. Edit the 10-kubadm.conf see

vi /etc/systemd/system/kubelet.service.d/10-kubeadm.conf 

Add the following before “ExeStart=”

Environment="KUBELET_EXTRA_ARGS=--cgroup-driver=systemd" 

6. Enable Overlay FS

sudo tee /etc/modules-load.d/overlay.conf <<-'EOF'
overlay
EOF 

7. Reboot to reload kernel modules

reboot 

8. Verify that OverlayFS is enabled:

lsmod | grep overlay
overlay 

9. Edit the docker-storage-setup file

vi /etc/sysconfig/docker-storage-setup 

add

STORAGE_DRIVER="overlay" 

10. Start Docker and Kubelet Services

systemctl start docker
systemctl start kubelet