21.8. Creating an encrypted Stratis pool by using the storage RHEL system role

Procedure

1. Store your sensitive variables in an encrypted file:

   1. Create the vault:

      $ ansible-vault create ~/vault.yml
      New Vault password: <vault_password>
      Confirm New Vault password: <vault_password>

   2. After the ansible-vault create command opens an editor, enter the sensitive data in the <key>: <value> format:

      luks_password: <password>

   3. Save the changes, and close the editor. Ansible encrypts the data in the vault.

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

   ---
   - name: Manage local storage
     hosts: managed-node-01.example.com
     vars_files:
       - ~/vault.yml
     tasks:
       - name: Create a new encrypted Stratis pool with Clevis and Tang
         ansible.builtin.include_role:
           name: redhat.rhel_system_roles.storage
         vars:
           storage_pools:
              - name: mypool
                disks:
                  - sdd
                  - sde
                type: stratis
                encryption: true
                encryption_password: "{{ luks_password }}"
                encryption_clevis_pin: tang
                encryption_tang_url: tang-server.example.com:7500

   The settings specified in the example playbook include the following:

   encryption_password

   Password or passphrase used to unlock the LUKS volumes.

   encryption_clevis_pin

   Clevis method that you can use to encrypt the created pool. You can use tang and tpm2.

   encryption_tang_url

   URL of the Tang server.

   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.

3. Validate the playbook syntax:

   $ ansible-playbook --ask-vault-pass --syntax-check ~/playbook.yml

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

4. Run the playbook:

   $ ansible-playbook --ask-vault-pass ~/playbook.yml