Add the ceph keyring files related task condition

If used external ceph for nova,the ceph storage not enable cephx.
So ceph keyring file not does not exist.
Task throw error of check ceph keyring files.

Change-Id: I6257c107b94abf4d363e854229aaab8301d1d694
Closes-Bug: #1684522

ansible/group_vars/all.yml

@@ -526,6 +526,8 @@ octavia_amp_flavor_id:
 # must provide separate disks than those for the OSDs
 ceph_enable_cache: "no"
 
+external_ceph_cephx_enabled: "yes"
+
 # Ceph is not able to determine the size of a cache pool automatically,
 # so the configuration on the absolute size is required here, otherwise the flush/evict will not work.
 ceph_target_max_bytes: ""

ansible/roles/nova/tasks/external-ceph.yml

@@ -12,12 +12,15 @@
   local_action: stat path="{{ node_custom_config }}/nova/ceph.client.nova.keyring"
   register: nova_cephx_keyring_file
   failed_when: not nova_cephx_keyring_file.stat.exists
+  when: external_ceph_cephx_enabled | bool
 
 - name: Check cinder keyring file
   local_action: stat path="{{ node_custom_config }}/nova/ceph.client.cinder.keyring"
   register: cinder_cephx_keyring_file
   failed_when: not cinder_cephx_keyring_file.stat.exists
-  when: cinder_backend_ceph | bool
+  when:
+    - cinder_backend_ceph | bool
+    - external_ceph_cephx_enabled | bool
 
 # NOTE: nova-compute and nova-libvirt only need ceph.client.nova.keyring.
 - name: Copy over ceph nova keyring file
@@ -27,7 +30,9 @@
   with_items:
     - nova-compute
     - nova-libvirt
-  when: inventory_hostname in groups['compute']
+  when:
+    - inventory_hostname in groups['compute']
+    - external_ceph_cephx_enabled | bool
 
 - name: Copy over ceph.conf
   copy:
@@ -57,11 +62,14 @@
 - name: Extract nova key from file
   local_action: shell cat "{{ nova_cephx_keyring_file.stat.path }}" | grep -E 'key\s*=' | awk '{ print $3 }'
   register: nova_cephx_raw_key
+  when: external_ceph_cephx_enabled | bool
 
 - name: Extract cinder key from file
   local_action: shell cat "{{ cinder_cephx_keyring_file.stat.path }}" | grep -E 'key\s*=' | awk '{ print $3 }'
   register: cinder_cephx_raw_key
-  when: cinder_backend_ceph | bool
+  when:
+    - cinder_backend_ceph | bool
+    - external_ceph_cephx_enabled | bool
 
 - name: Pushing secrets key for libvirt
   copy:
@@ -71,6 +79,7 @@
   when:
     - inventory_hostname in groups['compute']
     - item.enabled | bool
+    - external_ceph_cephx_enabled | bool
   with_items:
     - uuid: "{{ rbd_secret_uuid }}"
       content: "{{ nova_cephx_raw_key.stdout }}"

ansible/roles/nova/templates/nova.conf.j2

@@ -194,7 +194,7 @@ disk_cachemodes="network=writeback"
 hw_disk_discard = {{ nova_hw_disk_discard }}
 {% endif %}
 {% endif %}
-{% if nova_backend == "rbd" %}
+{% if nova_backend == "rbd" and external_ceph_cephx_enabled | bool %}
 rbd_secret_uuid = {{ rbd_secret_uuid }}
 {% endif %}
 

etc/kolla/globals.yml

@@ -202,6 +202,9 @@ kolla_internal_vip_address: "10.10.10.254"
 # must provide separate disks than those for the OSDs
 #ceph_enable_cache: "no"
 
+# Set to no if using external Ceph without cephx.
+#external_ceph_cephx_enabled: "yes"
+
 # Ceph is not able to determine the size of a cache pool automatically,
 # so the configuration on the absolute size is required here, otherwise the flush/evict will not work.
 #ceph_target_max_bytes: ""