[pod-gateway] Permit overriding DNSPolicy (#1435)

charts/stable/pod-gateway/Chart.yaml

@@ -2,7 +2,7 @@ apiVersion: v2
 appVersion: 1.2.6
 description: Admision controller to change the default gateway and DNS server of PODs
 name: pod-gateway
-version: 5.2.0
+version: 5.2.1
 kubeVersion: ">=1.16.0-0"
 keywords:
   - pod-gateway
@@ -21,4 +21,4 @@ dependencies:
 annotations:
   artifacthub.io/changes: |
     - kind: changed
-      description: Upgraded `common` chart dependency to version `4.3.0`.
+      description: Added option to override mutated pod's DNSPolicy.

charts/stable/pod-gateway/templates/webhook-deployment.yaml

@@ -50,7 +50,7 @@ spec:
             # Static
             - --tls-cert-file-path=/tls/tls.crt
             - --tls-key-file-path=/tls/tls.key
-            - --DNSPolicy=None
+            - --DNSPolicy={{ .Values.DNSPolicy }}
             # Init container
             - --initImage={{ .Values.image.repository }}:{{ .Values.image.tag }}
             - --initImagePullPol={{ .Values.image.pullPolicy }}

charts/stable/pod-gateway/values.yaml

@@ -18,6 +18,11 @@ image:
 # It must match VXLAN_GATEWAY_IP in settings.sh
 DNS: 172.16.0.1
 
+# -- The DNSPolicy to apply to the POD. Only when set to "None" will the
+# DNS value above apply. To avoid altering POD DNS (i.e., to allow
+# initContainers to use DNS before the the VXLAN is up), set to "ClusterFirst"
+DNSPolicy: None
+
 # -- cluster name used to derive the gateway full name
 clusterName: "cluster.local"