25.12. Resizing physical volumes by using the storage RHEL system role

Procedure

1. Create a playbook file, for example, ~/playbook.yml, with the following content:

   ---
   - name: Manage local storage
     hosts: managed-node-01.example.com
     tasks:
       - name: Resize LVM PV size
         ansible.builtin.include_role:
           name: redhat.rhel_system_roles.storage
         vars:
           storage_pools:
              - name: myvg
                disks: ["sdf"]
                type: lvm
                grow_to_fill: true

   The settings specified in the example playbook include the following:

   grow_to_fill

   true The role automatically expands the storage volume to use any new capacity on the disk.

   false The role leaves the storage volume at its current size, even if the underlying disk has grown.

   For details about all variables used in the playbook, see the /usr/share/ansible/roles/rhel-system-roles.storage/README.md file on the control node.

2. Validate the playbook syntax:

   $ ansible-playbook --syntax-check ~/playbook.yml

   Note that this command only validates the syntax and does not protect against a wrong but valid configuration.

3. Run the playbook:

   $ ansible-playbook ~/playbook.yml

Verification

1. Verify the grow_to_fill setting works as expected. Prepare a test PV and VG:

   # pvcreate /dev/sdf
   # vgcreate myvg /dev/sdf

2. Check and record the initial physical volume size:

   # pvs

3. Edit the playbook to set grow_to_fill: false and run the playbook.
4. Check the volume size and verify that it remained unchanged.
5. Edit the playbook to set grow_to_fill: true and re-run the playbook.
6. Check the volume size and verify that it has expanded.