cephadm: Set auth_allow_insecure_global_id_reclaim to true

Background in [1].
Ubuntu uses pre 15.2.11 client and new 15.2.11 installs default that to false,
therefore not allowing Ubuntu clients to connect.

[1]: https://docs.ceph.com/en/latest/security/CVE-2021-20288/

Change-Id: Ic251b447026262eab4b406b8432cc009ca97ae82

roles/cephadm/tasks/main.yml

@@ -79,6 +79,17 @@
   become: True
   loop: "{{ cephadm_ceph_osd_devices }}"
 
+# NOTE(mnasiadka): Ubuntu uses pre 15.2.11 Octopus client code and suffers from
+#                  https://docs.ceph.com/en/latest/security/CVE-2021-20288/
+
+- name: Set auth_allow_insecure_global_id_reclaim to True
+  command:
+    cmd: >
+         cephadm shell --
+         ceph config set mon auth_allow_insecure_global_id_reclaim true
+  become: true
+  when: ansible_distribution == "Ubuntu"
+
 - name: Create and initialise pools for OpenStack services
   command:
     cmd: >