kubernetesInstallCentOS.sh

#install kubernetes on CentOS
#run as root
#kubernetes will refuse to run on CentOS if swapoff is on
#line 1 & 2 ensure swapoff doesn’t interfere with k8 
swapoff -a
sed -i '/ swap swap /s/^/#/' /etc/fstab
yum -y update
yum -y install docker
systemctl enable docker && systemctl start docker
echo “[kubernetes]
name=Kubernetes
baseurl=https://packages.cloud.google.com/yum/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” >> /etc/yum.repos.d/kubernetes.repo

#Ensure that SELINUX doesn’t prevent docker and kubernetes from functioning
setenforce 0
sed -i 's/SELINUX=enforcing/SELINUX=permissive/g' /etc/selinux/config

yum install -y kubelet kubeadm kubectl
systemctl enable kubelet && systemctl start kubectl

echo “net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1” >> /etc/sysctl.d/k8s.conf

sysctl --system