Docker-common: Add missing variables declaration

Some variables are missing from ceph-docker-common role since the
include of check_mandatory_vars.yml has been re-added in the ceph-mon
role.

Signed-off-by: Guillaume Abrioux <gabrioux@redhat.com>

group_vars/all.yml.sample

@@ -247,12 +247,14 @@ dummy:
 
 ## Monitor options
 #
-# You must define monitor_interface.
+# You must define either monitor_interface, monitor_address or monitor_address_block.
-# You can also specify for each monitor which address the monitor will bind to in your **inventory host file** by using 'monitor_address' variable.
+# These variables must be defined at least in all.yml and overrided if needed (inventory host file or group_vars/*.yml).
-# Preference will go to monitor_address if both are defined.
+# Eg. If you want to specify for each monitor which address the monitor will bind to you can set it in your **inventory host file** by using 'monitor_address' variable.
+# Preference will go to monitor_address if both monitor_address and monitor_interface are defined.
 # To use an IPv6 address, use the monitor_address setting instead (and set ip_version to ipv6)
 #monitor_interface: interface
 #monitor_address: 0.0.0.0
+#monitor_address_block: []
 # set to either ipv4 or ipv6, whichever your network is using
 #ip_version: ipv4
 #mon_use_fqdn: false # if set to true, the MON name used will be the fqdn in the ceph.conf
@@ -421,6 +423,13 @@ dummy:
 
 #ceph_conf_key_directory: /etc/ceph
 
+###########
+# Network #
+###########
+#monitor_interface: 'interface'
+#monitor_address: '0.0.0.0'
+#monitor_address_block: []
+
 ############
 # KV store #
 ############

roles/ceph-common/defaults/main.yml

@@ -246,6 +246,7 @@ rbd_client_admin_socket_path: /var/run/ceph # must be writable by QEMU and allow
 # To use an IPv6 address, use the monitor_address setting instead (and set ip_version to ipv6)
 monitor_interface: interface
 monitor_address: 0.0.0.0
+monitor_address_block: []
 # set to either ipv4 or ipv6, whichever your network is using
 ip_version: ipv4
 mon_use_fqdn: false # if set to true, the MON name used will be the fqdn in the ceph.conf

roles/ceph-docker-common/defaults/main.yml

@@ -16,6 +16,13 @@ bootstrap_dirs_group: "64045"
 
 ceph_conf_key_directory: /etc/ceph
 
+###########
+# Network #
+###########
+monitor_interface: 'interface'
+monitor_address: '0.0.0.0'
+monitor_address_block: []
+
 ############
 # KV store #
 ############

roles/ceph-mon/tasks/check_mandatory_vars.yml

@@ -5,4 +5,4 @@
   when:
     - monitor_interface == 'interface'
     - monitor_address == '0.0.0.0'
-    - not monitor_address_block
+    - monitor_address_block | length == 0