- name: Install Kubernetes packages
  hosts: all
  become: true

  tasks:
    - name: Add Docker signing key
      ansible.builtin.apt_key:
        url: https://download.docker.com/linux/ubuntu/gpg
        state: present

    - name: Add Docker repository
      ansible.builtin.apt_repository:
        repo: deb [arch=amd64] https://download.docker.com/linux/ubuntu noble stable
        state: present

    - name: Install required packages
      ansible.builtin.apt:
        name:
          - apt-transport-https
          - ca-certificates
          - curl
          - gpg
          - containerd.io
        state: present
        update_cache: yes

## Questo non è nella documentazione! bisogna generare il file di configurazione di containerd
## ed scriverlo nella directory apposita, altrimenti usa un suo default che non va bene.

    - name: Ensure containerd config directory exists.
      ansible.builtin.file:
        path: /etc/containerd
        state: directory

    - name: Get defaults from containerd.
      ansible.builtin.command: containerd config default
      register: containerd_config_default

    - name: Create config file
      ansible.builtin.copy:
        content: "{{ containerd_config_default.stdout }}"
        dest: /etc/containerd/config.toml

    - name: Set SystemdCgroup to true
      ansible.builtin.replace:
        path: /etc/containerd/config.toml
        regexp: '^(\s*)SystemdCgroup\s*=\s*false'
        replace: '\1SystemdCgroup = true'

    - name: Restart containerd
      ansible.builtin.service:
        name: containerd
        state: restarted
        enabled: true
  
## Importantissimo per la gestione interna della network

    - name: Enable IPv4 forwarding at runtime
      ansible.posix.sysctl:
        name: net.ipv4.ip_forward
        value: '1'
        reload: true
        sysctl_set: yes

## Installa kubectl, kubeadm e kubelet dal repo ufficiale kubernetes

    - name: Add Kubernetes signing key
      ansible.builtin.apt_key:
        url: https://pkgs.k8s.io/core:/stable:/v1.33/deb/Release.key
        state: present

    - name: Add Kubernetes repository
      ansible.builtin.apt_repository:
        repo: deb [arch=amd64] https://pkgs.k8s.io/core:/stable:/v1.33/deb/ /
        state: present

    - name: Install Kubernetes components
      ansible.builtin.apt:
        name:
          - kubelet
          - kubeadm
          - kubectl
        state: present
        update_cache: true

## Ferma i pacchetti ad una specifica versione

    - name: Hold Kubernetes packages
      ansible.builtin.dpkg_selections:
        name: "{{ item }}"
        selection: hold
      loop:
        - kubelet
        - kubeadm
        - kubectl

## Abilita il servizio di kubelet

    - name: Enable and start kubelet
      systemd:
        name: kubelet
        enabled: true
        state: started