73 lines
2.0 KiB
Bash
Executable File
73 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 [ $MYOS = "CentOS" ]
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then
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echo RUNNING CENTOS CONFIG
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cat <<EOF | sudo tee /etc/yum.repos.d/kubernetes.repo
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[kubernetes]
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name=Kubernetes
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baseurl=https://packages.cloud.google.com/yum/repos/kubernetes-el7-\$basearch
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enabled=1
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gpgcheck=1
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repo_gpgcheck=1
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gpgkey=https://packages.cloud.google.com/yum/doc/yum-key.gpg https://packages.cloud.google.com/yum/doc/rpm-package-key.gpg
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exclude=kubelet kubeadm kubectl
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EOF
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# Set SELinux in permissive mode (effectively disabling it)
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setenforce 0
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sed -i 's/^SELINUX=enforcing$/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=1.24.3-00 kubeadm=1.24.3-00 kubectl=1.24.3-00
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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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