vgroup.yaml

---
- hosts: all
  become: true
  gather_facts: true
  tasks:
    - name: install lvm2 on the nodes
      yum:
        name: lvm2
        state: latest
    - name: get device info
      parted:
        device: /dev/sda
        unit: MiB
      register: sda_info
    - name: create 1GiB logical partition on webservers
      parted:
        device: /dev/sda
        flags: [ lvm ]
        number: "6"
        part_start: "{{sda_info.partitions[4].end + 1}}MiB"
        part_end: "{{sda_info.partitions[4].end + 1025}}MiB"
        part_type: logical
        state: present
        unit: MiB
      when:
        - inventory_hostname in groups['webservers']
    - name: create 600MiB logical partition on prod1
      parted:
        device: /dev/sda
        flags: [ lvm ]
        number: "6"
        part_start: "{{sda_info.partitions[4].end + 1}}MiB"
        part_end: "{{sda_info.partitions[4].end + 601}}MiB"
        part_type: logical
        state: present
      when:
        - inventory_hostname in groups['prod1']
    - name: create volume group
      lvg:
        vg: vgroup
        pvs: /dev/sda6
      when:
        - "inventory_hostname in groups['prod1'] or inventory_hostname in groups['webservers']"
...