Ensure correct scheduler extra arguments passed to v1beta3 template (#670)

* Ensure correct scheduler extra arguments passed to v1beta3 template
* Add unit tests for scheduler extra arguments

Author: treydock

Diff for: spec/classes/config/kubeadm_spec.rb

@@ -600,4 +600,20 @@
         .with_content(%r{key: node-role.kubernetes.io/control-plane\n})
     }
   end
+
+  context 'when scheduler_extra_arguments is defined' do
+    let(:params) do
+      {
+        'kubernetes_version' => '1.26.0',
+        'scheduler_extra_arguments' => ['bind-address: 0.0.0.0']
+      }
+    end
+
+    let(:config_yaml) { YAML.load_stream(catalogue.resource('file', '/etc/kubernetes/config.yaml').send(:parameters)[:content]) }
+
+    it 'has scheduler extra arguments' do
+      cluster_config = config_yaml.find { |c| c['kind'] == 'ClusterConfiguration' }
+      expect(cluster_config['scheduler']['extraArgs']['bind-address']).to eq('0.0.0.0')
+    end
+  end
 end

Diff for: templates/v1beta3/config_kubeadm.yaml.erb

@@ -84,9 +84,9 @@ controllerManager:
   <%- end -%>
 <%- end -%>
 scheduler:
-<%- if @scheduler_merged_extra_arguments -%>
+<%- if @scheduler_extra_arguments -%>
   extraArgs:
-  <%- @scheduler_merged_extra_arguments.each do |arg| -%>
+  <%- @scheduler_extra_arguments.each do |arg| -%>
     <%= arg %>
   <%- end -%>
 <%- end -%>