Add task to create volumes path in cephfs

If using the cephfs native backend, when container start the
manila-share process with the manila user, no permissions are
prompted when creating the volume.
One way to solve the problem is to create the volumes folder in
advance in cephfs and modify the owner and group to 42429:42429,
which is manila's uid and gid.

Change-Id: I1ad63e1c4698ec8ee83461aafefa63041cfeb387
Closes-Bug: #1761108

ansible/roles/manila/tasks/deploy.yml

@@ -28,3 +28,10 @@
 
 - name: Flush handlers
   meta: flush_handlers
+
+- include: fix_cephfs_owner.yml
+  when:
+    - enable_ceph | bool
+    - enable_ceph_mds | bool
+    - enable_manila_backend_cephfs_native | bool
+    - inventory_hostname in groups['manila-share']

ansible/roles/manila/tasks/fix_cephfs_owner.yml

@@ -0,0 +1,62 @@
+---
+- name: Check /tmp/cephfs path
+  command: "docker exec -u 0 manila_share ls /tmp/cephfs/"
+  register: check_cephfs
+  changed_when: False
+  failed_when: check_cephfs.rc != 0 and check_cephfs.stderr.find('No such file or directory') == -1
+  run_once: True
+
+- name: Create /tmp/cephfs path
+  command: "docker exec -u 0 manila_share mkdir -p /tmp/cephfs"
+  run_once: True
+  when: check_cephfs.rc != 0
+
+- name: Get cephfs addr
+  set_fact: cephfs_addr={% for host in groups['ceph-mon'] %}{{ hostvars[host]['ansible_' + hostvars[host]['storage_interface']]['ipv4']['address'] }}{% if loop.last %}:6789:/{% else %},{% endif %}{% endfor %}
+  run_once: True
+
+- name: Pulling cephx keyring for manila
+  command: docker exec ceph_mon ceph auth get-key client.manila
+  register: manila_keyring
+  delegate_to: "{{ groups['ceph-mon'][0] }}"
+  changed_when: False
+  run_once: True
+
+- name: Umount cephfs
+  command: "docker exec -u 0 manila_share umount /tmp/cephfs/"
+  register: umount_cephfs
+  changed_when: False
+  failed_when: False
+  run_once: True
+
+- name: Mount cephfs
+  command: "docker exec -u 0 manila_share mount -t ceph {{cephfs_addr}} /tmp/cephfs -o name=manila,secret={{ manila_keyring.stdout }}"
+  register: mount_cephfs
+  changed_when: False
+  run_once: True
+
+- name: Check volumes path
+  command: "docker exec -u 0 manila_share ls /tmp/cephfs/volumes"
+  register: check_volume
+  changed_when: False
+  failed_when: False
+  run_once: True
+
+- name: Create /tmp/cephfs/volumes path
+  command: "docker exec -u 0 manila_share mkdir /tmp/cephfs/volumes"
+  register: create_volume
+  run_once: True
+  when: check_volume.rc != 0
+
+- name: Change the owner and group of /tmp/cephfs/volumes
+  command: "docker exec -u 0 manila_share chown manila:manila /tmp/cephfs/volumes"
+  register: chown_volume
+  run_once: True
+  when: check_volume.rc != 0 and create_volume.rc == 0
+
+- name: Umount cephfs
+  command: "docker exec -u 0 manila_share umount /tmp/cephfs"
+  changed_when: False
+  register: umount_cephfs
+  run_once: True
+  when: mount_cephfs.rc == 0