13.5. Creating a swap volume by using the storage RHEL system role

You can use the storage RHEL system role to create or modify swap volumes on block devices.

Prerequisites

You have prepared the control node and the managed nodes.
You are logged in to the control node as a user who can run playbooks on the managed nodes.
The account you use to connect to the managed nodes has sudo permissions for these nodes.

Procedure

Create a playbook file, for example, ~/playbook.yml, with the following content:
```
---
- name: Create a disk device with swap
  hosts: managed-node-01.example.com
  roles:
    - rhel-system-roles.storage
  vars:
    storage_volumes:
      - name: swap_fs
        type: disk
        disks:
          - /dev/sdb
        size: 15 GiB
        fs_type: swap
```
The volume name (swap_fs in the example) is currently arbitrary. The storage role identifies the volume by the disk device listed under the disks: attribute.
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.
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.
Run the playbook:
```
$ ansible-playbook ~/playbook.yml
```