chore: Support Hostnetwork and DnsPolicy

Author: kahirokunn

templates/config/controller/deployment.yaml.tpl

@@ -79,5 +79,5 @@ spec:
       terminationGracePeriodSeconds: 10
       serviceAccountName: {{ .ServiceAccountName }}
       hostIPC: false
-      hostNetwork: false
       hostPID: false
+      hostNetwork: false

templates/helm/templates/deployment.yaml

@@ -141,8 +141,15 @@ spec:
       priorityClassName: {{ .Values.deployment.priorityClassName }}
       {{ end -}}
       hostIPC: false
-      hostNetwork: false
       hostPID: false
+      {{ if .Values.deployment.hostNetwork }}
+      hostNetwork: true
+      dnsPolicy: ClusterFirstWithHostNet
+      {{ else }}
+      hostNetwork: false
+      {{ with .Values.deployment.dnsPolicy }}
+      dnsPolicy: {{ . }}
+      {{ end }}
       volumes:
       {{- if .Values.aws.credentials.secretName -}}
         - name: {{ .Values.aws.credentials.secretName }}

templates/helm/values.yaml.tpl

@@ -28,6 +28,10 @@ deployment:
   # Which priorityClassName to set?
   # See: https://kubernetes.io/docs/concepts/scheduling-eviction/pod-priority-preemption/#pod-priority
   priorityClassName: ""
+  hostNetwork: false
+  # Which dnsPolicy to set?
+  # See: https://kubernetes.io/docs/concepts/services-networking/dns-pod-service/#pod-s-dns-policy
+  dnsPolicy: ClusterFirst
   extraVolumes: []
   extraVolumeMounts: []
 
@@ -52,7 +56,7 @@ deployment:
 # If "installScope: cluster" then these labels will be applied to ClusterRole
 role:
   labels: {}
-  
+
 metrics:
   service:
     # Set to true to automatically create a Kubernetes Service resource for the
@@ -80,7 +84,7 @@ aws:
     # Secret stringData key that contains the credentials
     secretKey: "credentials"
     # Profile used for AWS credentials
-    profile: "default"  
+    profile: "default"
 
 # log level for the controller
 log: