Enable hostNetwork for workload identity

Author: davidz627

deploy/kubernetes/base/controller.yaml

@@ -13,6 +13,11 @@ spec:
       labels:
         app: gcp-compute-persistent-disk-csi-driver
     spec:
+      # Host network must be used for interaction with Workload Identity in GKE
+      # since it replaces GCE Metadata Server with GKE Metadata Server. Remove
+      # this requirement when issue is resolved and before any exposure of
+      # metrics ports
+      hostNetwork: true 
       serviceAccountName: csi-gce-pd-controller-sa
       priorityClassName: csi-gce-pd-controller
       containers:

deploy/kubernetes/base/node.yaml

@@ -12,6 +12,11 @@ spec:
       labels:
         app: gcp-compute-persistent-disk-csi-driver
     spec:
+      # Host network must be used for interaction with Workload Identity in GKE
+      # since it replaces GCE Metadata Server with GKE Metadata Server. Remove
+      # this requirement when issue is resolved and before any exposure of
+      # metrics ports.
+      hostNetwork: true
       priorityClassName: csi-gce-pd-node
       serviceAccountName: csi-gce-pd-node-sa
       containers: