logvol.yaml

---
- hosts: all
  become: true
  gather_facts: true
  tasks:
    - name: create 800MiB logical volume if volume has more than 800MiB available
      lvol:
        lv: "lvm"
        vg: "vgroup"
        size: 800m
        state: present
      when:
        - "'vgroup' in ansible_facts['lvm']['vgs']"
        - ansible_facts['lvm']['vgs']['vgroup']['size_g'] > '0.80'
    - name: create 500MiB logical volume if volume has less than 800MiB available
      lvol:
        lv: "lvm"
        vg: "vgroup"
        size: 500m
        state: present
      when:
        - "'vgroup' in ansible_facts['lvm']['vgs']"
        - ansible_facts['lvm']['vgs']['vgroup']['size_g'] < '0.80'
    - name: display message for hosts which wont have the vgroup volume group
      debug:
        msg: "vgroup does not exist on host {{inventory_hostname}}"
      when: "'vgroup' not in ansible_facts['lvm']['vgs']"
...