Use default dnsPolicy for AKS

AKS overrides KUBERNETES_SERVICE_HOST with a FQDN value. Using
ClusterFirstWithHostNet would lead to antrea-agent start failure.

Signed-off-by: Quan Tian <qtian@vmware.com>

build/yamls/antrea-aks.yml

@@ -4272,7 +4272,7 @@ spec:
         - mountPath: /var/log/openvswitch
           name: host-var-log-antrea
           subPath: openvswitch
-      dnsPolicy: ClusterFirstWithHostNet
+      dnsPolicy: ClusterFirst
       hostNetwork: true
       initContainers:
       - command:

build/yamls/patches/aks/dnsPolicy.yml

@@ -0,0 +1,8 @@
+apiVersion: apps/v1
+kind: DaemonSet
+metadata:
+  name: antrea-agent
+spec:
+  template:
+    spec:
+      dnsPolicy: ClusterFirst

hack/generate-manifest.sh

@@ -355,6 +355,16 @@ if [[ $ENCAP_MODE == "networkPolicyOnly" ]] ; then
     cd ..
 fi
 
+if [[ $CLOUD == "AKS" ]]; then
+    mkdir aks && cd aks
+    cp ../../patches/aks/*.yml .
+    touch kustomization.yml
+    $KUSTOMIZE edit add base $BASE
+    $KUSTOMIZE edit add patch --path dnsPolicy.yml
+    BASE=../aks
+    cd ..
+fi
+
 if [[ $CLOUD == "GKE" ]]; then
     mkdir gke && cd gke
     cp ../../patches/gke/*.yml .