feat: Add support for adding new devices to existing Stratis pools

Related: RHEL-31854

library/blivet.py

@@ -1923,6 +1923,33 @@ def _member_management_is_destructive(self):
 
         return False
 
+    def _manage_members(self):
+        """ Schedule actions as needed to configure this pool's members. """
+        if not self._device:
+            return
+
+        add_disks = [d for d in self._disks if d not in self._device.ancestors]
+        remove_disks = [bd for bd in self._device.blockdevs if not any(d in bd.ancestors for d in self._disks)]
+
+        if remove_disks:
+            raise BlivetAnsibleError("cannot remove members '%s' from pool '%s': Stratis doesn't "
+                                     "support removing members from existing pools" %
+                                     (", ".join(d.name for d in remove_disks),
+                                      self._device.name))
+
+        if not add_disks:
+            return
+
+        for disk in add_disks:
+            member = self._create_one_member(disk)
+            try:
+                ac = ActionAddMember(self._device, member)
+                self._blivet.devicetree.actions.add(ac)
+            except Exception as e:
+                raise BlivetAnsibleError("failed to add disk '%s' to pool '%s': %s" % (disk.name,
+                                                                                       self._pool['name'],
+                                                                                       str(e)))
+
     def _get_format(self):
         fmt = get_format("stratis")
         if not fmt.supported or not fmt.formattable:

tests/tests_stratis.yml

@@ -162,3 +162,49 @@
 
     - name: Verify role results
       include_tasks: verify-role-results.yml
+
+    # XXX blivet supporting this is not yet released
+    - name: Run test only if blivet supports this functionality
+      when: false
+      block:
+        - name: Create one Stratis pool on one disk
+          include_role:
+            name: linux-system-roles.storage
+          vars:
+            storage_pools:
+              - name: foo
+                disks: "{{ unused_disks[0] }}"
+                type: stratis
+
+        - name: Verify role results
+          include_tasks: verify-role-results.yml
+
+        - name: Add the second disk to the pool
+          include_role:
+            name: linux-system-roles.storage
+          vars:
+            storage_pools:
+              - name: foo
+                disks: "{{ [unused_disks[0], unused_disks[1]] }}"
+                type: stratis
+
+        - name: Verify role results
+          include_tasks: verify-role-results.yml
+
+        - name: Clean up
+          include_role:
+            name: linux-system-roles.storage
+          vars:
+            storage_pools:
+              - name: foo
+                disks: "{{ unused_disks }}"
+                type: stratis
+                state: absent
+                volumes:
+                  - name: test1
+                    size: "{{ volume_size }}"
+                    mount_point: "{{ mount_location }}"
+                    state: absent
+
+        - name: Verify role results
+          include_tasks: verify-role-results.yml