Add priorityclassname Support and Test (#160)

* add priorityClassName

* add test

* indentation

Author: reynoldsme

charts/k8s-service/templates/_deployment_spec.tpl

@@ -433,6 +433,11 @@ spec:
 {{ toYaml . | indent 8 }}
     {{- end }}
 
+    {{- with .Values.priorityClassName }}
+      priorityClassName:
+{{ toYaml . | indent 8 }}
+    {{- end }}
+
     {{- with .Values.tolerations }}
       tolerations:
 {{ toYaml . | indent 8 }}

charts/k8s-service/values.yaml

@@ -637,6 +637,10 @@ containerResources: {}
 nodeSelector: {}
 affinity: {}
 
+# priorityClassName assigns a priorityClass to the deployment allowing pods to preempt or be preempted.
+# See https://kubernetes.io/docs/concepts/scheduling-eviction/pod-priority-preemption/#priorityclass
+priorityClassName: {}
+
 # tolerations can be used to allow the pod to be scheduled on nodes with a specific taint.
 # NOTE: This variable is injected directly into the pod spec. See the official documentation for what this might look
 # like: https://kubernetes.io/docs/concepts/configuration/taint-and-toleration/

test/k8s_service_config_injection_template_test.go

@@ -18,6 +18,20 @@ import (
 	corev1 "k8s.io/api/core/v1"
 )
 
+// Test that setting the `priorityClassName` input value will include priorityClassName in the pod spec of the deployment
+func TestK8sServicePriorityClassName(t *testing.T) {
+	t.Parallel()
+
+	deployment := renderK8SServiceDeploymentWithSetValues(
+		t,
+		map[string]string{
+			"priorityClassName": "testPriorityClass",
+		},
+	)
+	renderedPriorityClassName := deployment.Spec.Template.Spec.PriorityClassName
+	require.Equal(t, renderedPriorityClassName, "testPriorityClass")
+}
+
 // Test that setting the `envVars` input value to empty object leaves env vars out of the pod.
 func TestK8SServiceEnvVarConfigMapsSecretsEmptyDoesNotAddEnvVarsAndVolumesToPod(t *testing.T) {
 	t.Parallel()