57c445b564
Amendment of MYOS var for CentOS OS, as well as indentation for HERE document for the repo creation
72 lines
2.0 KiB
Bash
Executable File
72 lines
2.0 KiB
Bash
Executable File
#!/bin/bash
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# kubeadm installation instructions as on
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# https://kubernetes.io/docs/setup/production-environment/tools/kubeadm/install-kubeadm/
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# this script supports centos 7 and Ubuntu 20.04 only
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# run this script with sudo
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if ! [ $USER = root ]
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then
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echo run this script with sudo
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exit 3
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fi
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# setting MYOS variable
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MYOS=$(hostnamectl | awk '/Operating/ { print $3 }')
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OSVERSION=$(hostnamectl | awk '/Operating/ { print $4 }')
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##### CentOS 7 config
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if [ $MYOS = "CentOS" ]
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then
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echo RUNNING CENTOS CONFIG
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cat <<EOF > /etc/yum.repos.d/kubernetes.repo
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[kubernetes]
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name=Kubernetes
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baseurl=https://packages.cloud.google.com/yum/repos/kubernetes-el7-x86_64
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enabled=1
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gpgcheck=1
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repo_gpgcheck=1
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gpgkey=https://packages.cloud.google.com/yum/doc/yum-key.gpg https://packages.cloud.google.com/yum/doc/rpm-package-key.gpg
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EOF
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# Set SELinux in permissive mode (effectively disabling it)
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setenforce 0
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sed -i 's/^SELINUX=enforcing$/SELINUX=permissive/' /etc/selinux/config
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# disable swap (assuming that the name is /dev/centos/swap
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sed -i 's/^\/dev\/mapper\/centos-swap/#\/dev\/mapper\/centos-swap/' /etc/fstab
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swapoff /dev/mapper/centos-swap
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yum install -y kubelet kubeadm kubectl --disableexcludes=kubernetes
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systemctl enable --now kubelet
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fi
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if [ $MYOS = "Ubuntu" ]
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then
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echo RUNNING UBUNTU CONFIG
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cat <<EOF | sudo tee /etc/modules-load.d/k8s.conf
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br_netfilter
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EOF
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sudo apt-get update && sudo apt-get install -y apt-transport-https curl
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curl -s https://packages.cloud.google.com/apt/doc/apt-key.gpg | sudo apt-key add -
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cat <<EOF | sudo tee /etc/apt/sources.list.d/kubernetes.list
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deb https://apt.kubernetes.io/ kubernetes-xenial main
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EOF
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sudo apt-get update
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sudo apt-get install -y kubelet kubeadm kubectl
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sudo apt-mark hold kubelet kubeadm kubectl
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swapoff /swapfile
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sed -i 's/swapfile/#swapfile/' /etc/fstab
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fi
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# Set iptables bridging
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cat <<EOF > /etc/sysctl.d/k8s.conf
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net.bridge.bridge-nf-call-ip6tables = 1
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net.bridge.bridge-nf-call-iptables = 1
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EOF
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sysctl --system
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