Quick provisioning of Bookworm VMs via Vagrant/Vagrantfile

[matthewpoer]

Started on the guide today and had to debate a bit on the best way to set up the prerequisite machines.

I settled on a Vagrant file that I wanted to share, although I'm not sure where it would be best inserted.

Creating a file called Vagrant file with the below contents, then executing a vagrant up should allow one to start the guide on Step 3. Generate and Distribute SSH Keys.

The (IMO annoying) steps of setting up [virtual] machines with Debian (now oldstable) Bookworm, setting up sshd to allow passwords + root access, and install kubectl is handled here, so the next reader should be able to dive straight into the Kubernetes related work.

$script = <<-'SCRIPT'
apt-get update
apt-get -y install wget curl vim openssl git bash-completion
cd /root
git clone --depth 1 https://github.com/kelseyhightower/kubernetes-the-hard-way.git
cd kubernetes-the-hard-way
wget -q --show-progress \
  --https-only \
  --timestamping \
  -P downloads \
  -i downloads-$(dpkg --print-architecture).txt
ARCH=$(dpkg --print-architecture)
mkdir -p downloads/{client,cni-plugins,controller,worker}
tar -xvf downloads/crictl-v1.32.0-linux-${ARCH}.tar.gz \
  -C downloads/worker/
tar -xvf downloads/containerd-2.1.0-beta.0-linux-${ARCH}.tar.gz \
  --strip-components 1 \
  -C downloads/worker/
tar -xvf downloads/cni-plugins-linux-${ARCH}-v1.6.2.tgz \
  -C downloads/cni-plugins/
tar -xvf downloads/etcd-v3.6.0-rc.3-linux-${ARCH}.tar.gz \
  -C downloads/ \
  --strip-components 1 \
  etcd-v3.6.0-rc.3-linux-${ARCH}/etcdctl \
  etcd-v3.6.0-rc.3-linux-${ARCH}/etcd
mv downloads/{etcdctl,kubectl} downloads/client/
mv downloads/{etcd,kube-apiserver,kube-controller-manager,kube-scheduler} \
  downloads/controller/
mv downloads/{kubelet,kube-proxy} downloads/worker/
mv downloads/runc.${ARCH} downloads/worker/runc
rm -rf downloads/*gz
chmod +x downloads/{client,cni-plugins,controller,worker}/*
cp downloads/client/kubectl /usr/local/bin/
echo "source /etc/bash_completion" >> ~/.bashrc
echo "source <(kubectl completion bash)" >> ~/.bashrc
echo "192.168.0.10 server.kubernetes.local server" > /root/machines.txt
echo "192.168.0.20 node-0.kubernetes.local node-0 192.168.0.20/24" >> /root/machines.txt
echo "192.168.0.30 node-1.kubernetes.local node-1 192.168.0.30/24" >> /root/machines.txt
SCRIPT

$sshd_script = <<-'SCRIPT'
sed -i 's/^#*PermitRootLogin.*/PermitRootLogin yes/' /etc/ssh/sshd_config
sed -i 's/^#*PasswordAuthentication.*/PasswordAuthentication yes/' /etc/ssh/sshd_config
systemctl restart sshd
SCRIPT

Vagrant.configure("2") do |config|
  config.vm.define "jumpbox" do |jumpbox|
    jumpbox.vm.box = "debian/bookworm64"
    jumpbox.vm.hostname = "jumpbox"
    jumpbox.vm.network "private_network", ip: "192.168.10.100"
    jumpbox.vm.provision "shell", inline: $script
  end
  config.vm.define "server" do |server|
    server.vm.box = "debian/bookworm64"
    server.vm.hostname = "server"
    server.vm.network "private_network", ip: "192.168.0.10"
    server.vm.provision "shell", inline: $sshd_script
  end
  config.vm.define "node-0" do |node0|
    node0.vm.box = "debian/bookworm64"
    node0.vm.hostname = "node-0"
    node0.vm.network "private_network", ip: "192.168.0.20"
    node0.vm.provision "shell", inline: $sshd_script
  end
  config.vm.define "node1" do |node1|
    node1.vm.box = "debian/bookworm64"
    node1.vm.hostname = "node-1"
    node1.vm.network "private_network", ip: "192.168.0.30"
    node1.vm.provision "shell", inline: $sshd_script
  end
end