hostNetwork and dnsPolicy options configurable

metricbeat/templates/daemonset.yaml

@@ -91,8 +91,8 @@ spec:
       initContainers:
 {{ tpl .Values.extraInitContainers . | indent 6 }}
       {{- end }}
-      hostNetwork: true  
-      dnsPolicy: ClusterFirstWithHostNet 
+      hostNetwork: {{ .Values.hostNetwork | default false }}
+      dnsPolicy: {{ .Values.dnsPolicy | default "ClusterFirst" }}
       containers:
       - name: "metricbeat"
         image: "{{ .Values.image }}:{{ .Values.imageTag }}"

metricbeat/tests/metricbeat_test.py

@@ -47,6 +47,28 @@ def test_defaults():
     } in volumes
 
 
+def test_override_the_default_host_network_option():
+    config = """
+hostNetwork: true
+"""
+    r = helm_template(config)
+    assert (
+        r["daemonset"][name]["spec"]["template"]["spec"]["hostNetwork"]
+        == True
+    )
+
+
+def test_override_the_default_dns_policy_option():
+    config = """
+dnsPolicy: ClusterFirstWithHostNet
+"""
+    r = helm_template(config)
+    assert (
+        r["daemonset"][name]["spec"]["template"]["spec"]["dnsPolicy"]
+        == "ClusterFirstWithHostNet"
+    )
+
+
 def test_adding_a_extra_container():
     config = """
 extraContainers: |

metricbeat/values.yaml

@@ -190,6 +190,9 @@ nodeSelector: {}
 
 affinity: {}
 
+hostNetwork: false
+dnsPolicy: "ClusterFirst"
+
 # This is the PriorityClass settings as defined in
 # https://kubernetes.io/docs/concepts/configuration/pod-priority-preemption/#priorityclass
 priorityClassName: ""