---
- name: Expand Ubuntu LVM root filesystem
  hosts: all
  gather_facts: no
  become: yes

  vars:
    root_disk: /dev/sda
    root_partition: /dev/sda3
    root_partition_number: 3
    root_lv: /dev/mapper/ubuntu--vg-ubuntu--lv

  tasks:
    - name: Rescan SCSI bus
      ansible.builtin.shell: |
        for host in /sys/class/scsi_host/host*; do
          echo "- - -" > "$host/scan"
        done
      args:
        executable: /bin/bash
      changed_when: true

    - name: Wait after rescan
      ansible.builtin.pause:
        seconds: 5

    - name: Ensure growpart is installed
      ansible.builtin.apt:
        name: cloud-guest-utils
        state: present
        update_cache: yes

    - name: Expand partition if needed
      ansible.builtin.command: "growpart {{ root_disk }} {{ root_partition_number }}"
      register: growpart_result
      changed_when: "'CHANGED:' in growpart_result.stdout"
      failed_when: >
        growpart_result.rc != 0 and
        'NOCHANGE:' not in growpart_result.stdout

    - name: Resize LVM physical volume
      ansible.builtin.command: "pvresize {{ root_partition }}"
      register: pvresize_result
      changed_when: "'resized' in (pvresize_result.stdout | lower) or 'changed' in (pvresize_result.stdout | lower)"
      failed_when: false

    - name: Extend root logical volume and filesystem
      ansible.builtin.command: "lvextend -r -l +100%FREE {{ root_lv }}"
      register: lvextend_result
      changed_when: "'logical volume' in (lvextend_result.stdout | lower) or 'size of logical volume' in (lvextend_result.stdout | lower)"
      failed_when: false

    - name: Show final disk state
      ansible.builtin.shell: |
        pvs
        vgs
        lvs
        df -h /
      args:
        executable: /bin/bash
      register: final_state
      changed_when: false

    - name: Print final disk state
      ansible.builtin.debug:
        var: final_state.stdout_lines