71 lines
2.6 KiB
Bash
71 lines
2.6 KiB
Bash
#!/bin/bash
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## !IMPORTANT ##
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#
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## This script is tested only in the generic/ubuntu2204 Vagrant box
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## If you use a different version of Ubuntu or a different Ubuntu Vagrant box test this again
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#
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echo "[TASK 1] Disable and turn off SWAP"
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sed -i '/swap/d' /etc/fstab
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swapoff -a
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echo "[TASK 2] Stop and Disable firewall"
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systemctl disable --now ufw >/dev/null 2>&1
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echo "[TASK 3] Enable and Load Kernel modules"
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cat >>/etc/modules-load.d/containerd.conf<<EOF
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overlay
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br_netfilter
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EOF
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modprobe overlay
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modprobe br_netfilter
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echo "[TASK 4] Add Kernel settings"
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cat >>/etc/sysctl.d/kubernetes.conf<<EOF
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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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net.ipv4.ip_forward = 1
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EOF
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sysctl --system >/dev/null 2>&1
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echo "[TASK 5] Install containerd runtime"
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export DEBIAN_FRONTEND=noninteractive
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apt-get update -qq >/dev/null
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apt-get install -qq -y apt-transport-https ca-certificates curl gnupg lsb-release >/dev/null
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mkdir -p /etc/apt/keyrings
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curl -fsSL https://download.docker.com/linux/ubuntu/gpg | gpg --dearmor -o /etc/apt/keyrings/docker.gpg
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echo \
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"deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.gpg] https://download.docker.com/linux/ubuntu \
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$(lsb_release -cs) stable" > /etc/apt/sources.list.d/docker.list
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apt-get update -qq >/dev/null
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apt-get install -qq -y containerd.io >/dev/null
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containerd config default > /etc/containerd/config.toml
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sed -i 's/SystemdCgroup \= false/SystemdCgroup \= true/g' /etc/containerd/config.toml
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systemctl restart containerd
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systemctl enable containerd >/dev/null
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echo "[TASK 6] Set up kubernetes repo"
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curl -fsSL https://pkgs.k8s.io/core:/stable:/v1.29/deb/Release.key | gpg --dearmor -o /etc/apt/keyrings/kubernetes-apt-keyring.gpg
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echo 'deb [signed-by=/etc/apt/keyrings/kubernetes-apt-keyring.gpg] https://pkgs.k8s.io/core:/stable:/v1.29/deb/ /' > /etc/apt/sources.list.d/kubernetes.list
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echo "[TASK 7] Install Kubernetes components (kubeadm, kubelet and kubectl)"
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apt-get update -qq >/dev/null
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apt-get install -qq -y kubeadm kubelet kubectl >/dev/null
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echo "[TASK 8] Enable ssh password authentication"
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sed -i 's/^PasswordAuthentication .*/PasswordAuthentication yes/' /etc/ssh/sshd_config
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echo 'PermitRootLogin yes' >> /etc/ssh/sshd_config
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systemctl reload sshd
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echo "[TASK 9] Set root password"
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echo -e "kubeadmin\nkubeadmin" | passwd root >/dev/null 2>&1
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echo "export TERM=xterm" >> /etc/bash.bashrc
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echo "[TASK 10] Update /etc/hosts file"
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cat >>/etc/hosts<<EOF
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172.16.16.100 kmaster.example.com kmaster
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172.16.16.101 kworker1.example.com kworker1
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172.16.16.102 kworker2.example.com kworker2
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EOF
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