ansible_samba_tasks/tasks/create_proxmox_debian_template.yml

---
- name: Build Debian Cloud Template directly from Proxmox
  hosts: node0
  become: true
  gather_facts: false

  vars_files:
  - ../vars/debian_template.yml

  vars:
    lxc_name: "debian-builder"
    lxc_id: 9900
    lxc_storage: "local-lvm"
    # lxc_storage: "hdd8t"
    lxc_template: "local:vztmpl/debian-13-standard_13.1-1_amd64.tar.zst"
    lxc_ostype: "debian"
    lxc_cores: 4
    lxc_memory: 4096
    lxc_swap: 0
    lxc_net: "name=eth0,bridge=vmbr0,ip=dhcp"
    lxc_rootfs_size: "8G"
    lxc_password: "password" 
    container_id: "{{ lxc_id }}"

  tasks:
    - block:

      - name: Ensure build environment packages are installed on Proxmox
        ansible.builtin.apt:
          name:
            # - libguestfs-tools
            # - qemu-utils
            - rsync
          state: present
          update_cache: true

      - name: Combine SSH public keys into one file
        ansible.builtin.copy:
          dest: '{{ ssh_keys_file }}'
          content: |
            {% for key in ssh_public_keys %}
            {{ key }}
            {% endfor %}
          mode: '0644'

      - name: Create LXC build container
        ansible.builtin.command: >
          pct create {{ lxc_id }} {{ lxc_template }}
          --hostname {{ lxc_name }}
          --password '{{ lxc_password }}'
          --ssh-public-keys '{{ ssh_keys_file }}'
          --cores {{ lxc_cores }}
          --memory {{ lxc_memory }}
          --swap {{ lxc_swap }}
          --ostype {{ lxc_ostype }}
          --net0 {{ lxc_net }}
          --storage {{ lxc_storage }}
          --features nesting=1
          --start
        args:
          creates: "/etc/pve/lxc/{{ lxc_id }}.conf"

      - name: Check if LXC container {{ lxc_name }} is running
        ansible.builtin.command:
          cmd: pct status {{ lxc_id }}
        register: pct_status
        changed_when: false

      - name: Start the LXC container {{ lxc_name }} if stopped
        ansible.builtin.command:
          cmd: pct start {{ lxc_id }}
        when: "'status: stopped' in pct_status.stdout"
        register: start_result
        changed_when: "'status: stopped' in pct_status.stdout"

      - name: Wait until container has an IP address
        ansible.builtin.shell: "pct exec {{ lxc_id }} -- hostname -I | awk '{print $1}'"
        register: lxc_ip
        until: lxc_ip.stdout != ''
        retries: 10
        delay: 5
        changed_when: false
        failed_when: lxc_ip.stdout == ''
        
      - name: Add temporary LXC to in-memory inventory
        ansible.builtin.add_host:
          name: lxc_builder
          ansible_host: "{{ lxc_ip.stdout }}"
          ansible_user: root
          ansible_password: "{{ lxc_password }}"

          ansible_ssh_common_args: '-o StrictHostKeyChecking=no'

- name: Customize Debian cloud image inside LXC
  hosts: lxc_builder
  become: true

  vars_files:
  - ../vars/debian_template.yml

  tasks:
    - block:

      - name: Install build dependencies in LXC
        ansible.builtin.apt:
          name:
            - qemu-utils
            - libguestfs-tools
            - curl
            - wget
            - rsync
            - xz-utils
            - nano
            - htop
          state: present
          update_cache: true

      - name: Create working directory
        ansible.builtin.file:
          path: "{{ workdir }}"
          state: directory

      - name: Download latest Debian genericcloud image
        ansible.builtin.get_url:
          url: "{{ debian_image_url }}"
          dest: "{{ workdir }}/{{ image_name }}"
          mode: "0644"
          force: true

      - name: Customize image with base utilities and root password
        ansible.builtin.command: >
          virt-customize -a {{ workdir }}/{{ image_name }}
          --install "curl,wget,nano,rsync,htop"
          --root-password password:{{ root_password }}

      - name: Set DHCP identifier to hostname for cloud-init
        ansible.builtin.shell: |
          virt-customize -a {{ workdir }}/{{ image_name }} \
          --run-command "echo 'dhcp-identifier: hostname' >> /etc/cloud/cloud.cfg.d/99_hostname.cfg"

      - name: Reset machine-id
        ansible.builtin.shell: |
          virt-customize -a {{ workdir }}/{{ image_name }} \
          --run-command 'truncate -s 0 /etc/machine-id && rm -f /var/lib/dbus/machine-id'

      - name: Convert image to compressed qcow2
        ansible.builtin.shell: |
          qemu-img convert -O qcow2 -c {{ workdir }}/{{ image_name }} {{ workdir }}/{{ template_name }}.qcow2
        args:
          creates: "{{ workdir }}/{{ template_name }}.qcow2"

      - name: Shrink the compressed qcow2 using virt-sparsify
        ansible.builtin.shell: |
          virt-sparsify --compress {{ workdir }}/{{ template_name }}.qcow2 {{ workdir }}/{{ template_name }}_sparse.qcow2
        args:
          creates: "{{ workdir }}/{{ template_name }}_sparse.qcow2"

      - name: Replace original compressed image with sparsified version
        ansible.builtin.shell: |
          mv {{ workdir }}/{{ template_name }}_sparse.qcow2 {{ workdir }}/{{ template_name }}.qcow2
          
      # - name: Compress and shrink image
      #   ansible.builtin.shell: |
      #     qemu-img convert -O qcow2 -c {{ workdir }}/{{ image_name }} {{ workdir }}/{{ template_name }}.qcow2
      #     qemu-img resize {{ workdir }}/{{ template_name }}.qcow2 --shrink

      - name: Copy finished template back to Proxmox host
        ansible.builtin.synchronize:
          src: "{{ workdir }}/{{ template_name }}.qcow2"
          dest: "/var/lib/vz/template/qcow2/"
          mode: pull
          rsync_opts:
            - "--rsync-path='sudo rsync'"

- name: Import Debian Cloud image as Proxmox VM template
  hosts: node0
  become: true

  tasks:
    - block:
      - name: Import QCOW2 as disk to new VM
        ansible.builtin.shell: >
          qm create {{ proxmox_template_vm_id }}
          --name {{ template_name }}
          --memory 1024
          --net0 virtio,bridge=vmbr0 &&
          qm importdisk {{ proxmox_template_vm_id }}
          /var/lib/vz/template/qcow2/{{ template_name }}.qcow2 {{ proxmox_storage }}

      - name: Configure VM for Cloud-Init
        ansible.builtin.shell: |
          qm set {{ proxmox_template_vm_id }} \
          --scsihw virtio-scsi-pci \
          --scsi0 {{ proxmox_storage }}:vm-{{ proxmox_template_vm_id }}-disk-0 \
          --ide2 {{ proxmox_storage }}:cloudinit \
          --boot c --bootdisk scsi0 \
          --serial0 socket --vga serial0

      - name: Convert VM to template
        ansible.builtin.shell: "qm template {{ proxmox_template_vm_id }}"

      - name: Stop and destroy LXC build container
        ansible.builtin.shell: "pct stop {{ lxc_id }} && pct destroy {{ lxc_id }} --purge"
        ignore_errors: true

      - ansible.builtin.debug:
          msg: "✅ Debian Cloud-Init template {{ template_name }} (VMID {{ proxmox_template_vm_id }}) created successfully!"