Update dev overlay so that image overwrite can work

In current dev overlay, kustomization will not work well with image
setting (overwriting)

Modify the structure to fix it.

Author: jingxu97

deploy/kubernetes/overlays/dev/kustomization.yaml

@@ -1,11 +1,14 @@
 apiVersion: kustomize.config.k8s.io/v1beta1
 kind: Kustomization
-resources:
-- ../alpha
 patchesStrategicMerge:
 - controller_always_pull.yaml
 - node_always_pull.yaml
 namespace: gce-pd-csi-driver
+resources:
+- ../../base/
+# Here dev overlay is using the same image as alpha
+transformers:
+- ../../images/alpha
 # To change the dev image, add something like the following.
 #images:
 #- name: gke.gcr.io/gcp-compute-persistent-disk-csi-driver

test/run-k8s-integration.sh

@@ -10,7 +10,7 @@ set -o nounset
 set -o errexit
 
 readonly PKGDIR=${GOPATH}/src/sigs.k8s.io/gcp-compute-persistent-disk-csi-driver
-readonly overlay_name="${GCE_PD_OVERLAY_NAME:-stable}"
+readonly overlay_name="${GCE_PD_OVERLAY_NAME:-dev}"
 readonly boskos_resource_type="${GCE_PD_BOSKOS_RESOURCE_TYPE:-gce-project}"
 readonly do_driver_build="${GCE_PD_DO_DRIVER_BUILD:-true}"
 readonly deployment_strategy=${DEPLOYMENT_STRATEGY:-gce}