Run user creation on condition.

Meant to be used in plays where we use the 'first_in_tag' host vars to only run usercreation on one machine.

playbooks/roles/mongo/defaults/main.yml

@@ -27,6 +27,10 @@ MONGO_CLUSTERED: !!null
 mongo_logpath: "{{ mongo_log_dir }}/mongodb.log"
 mongo_dbpath: "{{ mongo_data_dir }}/mongodb"
 
+# Have to use this conditional instead of ignore errors
+# because the mongo_user module fails and doesn't ginore errors.
+mongo_create_users: !!null
+
 # If the system is running out of an Amazon Web Services
 # cloudformation stack, this group name can used to pull out
 # the name of the stack the mongo server resides in.

playbooks/roles/mongo/tasks/main.yml

@@ -66,8 +66,8 @@
   shell: /usr/bin/mongo  /tmp/repset_init.js
   when: MONGO_CLUSTERED
 
-# Ignoring errors here because slave instances will fail this command
-# since slaveOk is false in ansible 1.3.
+# Ignore errors doesn't work because the module throws an exception
+# it doesn't catch.
 - name: mongo | create a mongodb user
   mongodb_user: >
     database={{ item.database }}
@@ -75,3 +75,4 @@
     password={{ item.password }}
     state=present
   with_items: MONGO_USERS
+  when: mongo_create_users