New instance parameter 'additional_groups'

User can define additional groups for instance and fenced users.
Multiple groups can be defined as an array.

README.md

@@ -124,6 +124,7 @@ db2::install { '11.1':
 * `instance_user_uid`: UID of the instance user
 * `instance_user_gid`: GID of the instance user 
 * `instance_user_home`: Home directory of the instance user
+* `additional_groups`: An array of additional groups for instance and fence users (optional, default: undef)
 * `type`: Type of product this instance is for (default: ese)
 * `auth`: Type of auth for this instance (default: server)
 * `users_forcelocal`: Force the creation of instance and fence users to be local, true or false. (default: undef)

manifests/instance.pp

@@ -14,6 +14,7 @@
   $instance_user_uid    = undef,
   $instance_user_gid    = undef,
   $instance_user_home   = undef,
+  $additional_groups    = undef,
   $users_forcelocal     = undef,
   $port                 = undef,
   $type                 = 'ese',
@@ -32,6 +33,7 @@
         home       => $fence_user_home,
         forcelocal => $users_forcelocal,
         managehome => true,
+        groups     => $additional_groups,
       }
     }
   }
@@ -43,6 +45,7 @@
       home       => $instance_user_home,
       forcelocal => $users_forcelocal,
       managehome => true,
+      groups     => $additional_groups,
     }
   }
 

spec/defines/instance_spec.rb

@@ -69,19 +69,22 @@
       :fence_user_uid => '1002',
       :fence_user_gid => 'db2fencg',
       :fence_user_home => '/db2/fence',
+      :additional_groups => 'db2group',
     }}
     it do
       is_expected.to contain_user('db2inst').with(
         :uid => '1001',
         :gid => 'db2instg',
-        :home => '/db2/inst'
+        :home => '/db2/inst',
+        :groups => 'db2group',
       )
     end
     it do
       is_expected.to contain_user('db2fence').with(
         :uid => '1002',
         :gid => 'db2fencg',
         :home => '/db2/fence',
+        :groups => 'db2group',
       )
     end
   end