Allow overriding UID during user creation

Gemfile.lock

@@ -223,6 +223,3 @@ DEPENDENCIES
   rake
   stove
   test-kitchen
-
-BUNDLED WITH
-   1.10.6

attributes/default.rb

@@ -68,10 +68,18 @@
 # Should node['kafka']['user'] and node['kafka']['group'] be created?
 default['kafka']['manage_user'] = true
 
+#
+# Override UID for User for directories, configuration files and running Kafka.
+default['kafka']['uid'] = nil
+
 #
 # Group for directories, configuration files and running Kafka.
 default['kafka']['group'] = 'kafka'
 
+#
+# Override GID for Group for directories, configuration files and running Kafka.
+default['kafka']['gid'] = nil
+
 #
 # JVM heap options for Kafka.
 default['kafka']['heap_opts'] = '-Xmx1G -Xms1G'

recipes/_setup.rb

@@ -4,11 +4,13 @@
 #
 
 group node['kafka']['group'] do
+  gid node['kafka']['gid'] if node['kafka']['gid']
   only_if { node['kafka']['manage_user'] }
 end
 
 user node['kafka']['user'] do
-  gid node['kafka']['group']
+  gid node['kafka']['gid'] if node['kafka']['gid']
+  uid node['kafka']['uid'] if node['kafka']['uid']
   home '/var/empty/kafka'
   shell '/sbin/nologin'
   only_if { node['kafka']['manage_user'] }

spec/recipes/setup_spec.rb

@@ -19,10 +19,27 @@
         expect(chef_run).to create_group('kafka')
       end
 
+      it 'creates a kafka user' do
+        expect(chef_run).to create_user('kafka').with({
+          shell: '/sbin/nologin'
+        })
+      end
+    end
+
+    context 'when uid and gid' do
+      let :kafka_attrs do
+        {uid: 1234, gid: 5678}
+      end
+
+      it 'creates a kafka group' do
+        expect(chef_run).to create_group('kafka')
+      end
+
       it 'creates a kafka user' do
         expect(chef_run).to create_user('kafka').with({
           shell: '/sbin/nologin',
-          gid: 'kafka'
+          gid: 5678,
+          uid: 1234
         })
       end
     end
@@ -55,8 +72,7 @@
 
       it 'creates a user with set name' do
         expect(chef_run).to create_user('spec').with({
-          shell: '/sbin/nologin',
-          gid: 'spec'
+          shell: '/sbin/nologin'
         })
       end
     end