16.14. Configuring a RAID volume by using the storage RHEL system role
With the storage system role, you can configure a RAID volume on RHEL by using Red Hat Ansible Automation Platform and Ansible-Core. Create an Ansible Playbook with the parameters to configure a RAID volume to suit your requirements.
Device names might change in certain circumstances, for example, when you add a new disk to a system. Therefore, to prevent data loss, use persistent naming attributes in the playbook. For more information about persistent naming attributes, see Persistent naming attributes.
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
sudopermissions for these nodes.
Procedure
Create a playbook file, for example,
~/playbook.yml, with the following content:--- - name: Manage local storage hosts: managed-node-01.example.com tasks: - name: Create a RAID on sdd, sde, sdf, and sdg ansible.builtin.include_role: name: redhat.rhel_system_roles.storage vars: storage_safe_mode: false storage_volumes: - name: data type: raid disks: [sdd, sde, sdf, sdg] raid_level: raid0 raid_chunk_size: 32 KiB mount_point: /mnt/data state: presentFor details about all variables used in the playbook, see the
/usr/share/ansible/roles/rhel-system-roles.storage/README.mdfile on the control node.Validate the playbook syntax:
$ ansible-playbook --syntax-check ~/playbook.ymlNote that this command only validates the syntax and does not protect against a wrong but valid configuration.
Run the playbook:
$ ansible-playbook ~/playbook.yml
Verification
Verify that the array was correctly created:
# ansible managed-node-01.example.com -m command -a 'mdadm --detail /dev/md/data'