| #!/bin/bash | |
| # Author: vishmule | |
| # Configure VMs before installation of Kubernetes components | |
| ## Disable Selinux | |
| setenforce 0 | |
| sed -i 's/^SELINUX=enforcing$/SELINUX=permissive/' /etc/selinux/config | |
| ## Update IP table setting | |
| ## This ensures that packets are properly processed by IP tables during filtering and port forwarding. | |
| cat <<EOF | sudo tee /etc/sysctl.d/k8s.conf | |
| net.bridge.bridge-nf-call-ip6tables = 1 | |
| net.bridge.bridge-nf-call-iptables = 1 | |
| EOF | |
| sysctl --system | |
| ## Disable Swap in order to work kubelet smoothly | |
| sed -i '/swap/d' /etc/fstab | |
| swapoff -a | |
| ## Add Kubernetes Repo | |
| cat <<EOF > /etc/yum.repos.d/kubernetes.repo | |
| [kubernetes] | |
| name=Kubernetes | |
| baseurl=https://packages.cloud.google.com/yum/repos/kubernetes-el7-\$basearch | |
| 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 | |
| ## Install kubeadm and docker | |
| yum install kubeadm docker -y | |
| ## Start and enabled docker, kubelet service | |
| systemctl restart docker && systemctl enable docker | |
| systemctl restart kubelet && systemctl enable kubelet |
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