#cloud-config
package_update: true
package_upgrade: true
packages:
  - apt-transport-https
  - ca-certificates
  - curl
  - containerd

runcmd:
  # Disabilita swap
  - swapoff -a
  - sed -i '/ swap / s/^\(.*\)$/#\1/g' /etc/fstab

  # Carica moduli del kernel e imposta sysctl
  - modprobe overlay
  - modprobe br_netfilter
  - sysctl -p

  # Installa Kubernetes
  - curl -fsSL https://pkgs.k8s.io/core:/stable:/v1.29/deb/Release.key | gpg --dearmor -o /etc/apt/keyrings/kubernetes-apt-keyring.gpg
  - echo 'deb [signed-by=/etc/apt/keyrings/kubernetes-apt-keyring.gpg] https://pkgs.k8s.io/core:/stable:/v1.29/deb/ /' | tee /etc/apt/sources.list.d/kubernetes.list
  - apt-get update
  - apt-get install -y kubelet=${k8s_version} kubeadm=${k8s_version}
  - apt-mark hold kubelet kubeadm

  # Il passo finale (kubeadm join) andrà eseguito manualmente.