🐛 Don't use NodeLocalDNS addon (knative#257)

* Don't use NodeLocalDNS and use production GKE API instead of beta

* Ensure the kubetest2 is installed and available in the PATH.

e2e-tests.sh

@@ -177,10 +177,6 @@ function initialize() {
     shift
   done
 
-  if [[ "${CLOUD_PROVIDER}" == "gke" ]]; then
-      custom_flags+=("--addons=NodeLocalDNS")
-  fi
-
   readonly SKIP_DUMP_ON_FAILURE
   readonly TEARDOWN
   readonly CLOUD_PROVIDER

infra-library.sh

@@ -133,6 +133,12 @@ function create_gke_test_cluster() {
   if [[ "${ENABLE_PREEMPTIBLE_NODES:-}" == "true" ]]; then
     extra_gcloud_flags="${extra_gcloud_flags} --preemptible"
   fi
+  if ! command -v kubetest2 >/dev/null; then
+    tmpbin="$(mktemp -d)"
+    echo "kubetest2 not found, installing in temp path: ${tmpbin}"
+    GOBIN="$tmpbin" go install sigs.k8s.io/kubetest2/...@latest
+    export PATH="${tmpbin}:${PATH}"
+  fi
   run_kntest kubetest2 gke "${_custom_flags[@]}" \
     --test-command="${_test_command[*]}" \
     --extra-gcloud-flags="${extra_gcloud_flags}"

test/unit/presubmit_test.go

@@ -53,7 +53,6 @@ func TestMainFunc(t *testing.T) {
 				"--enable-workload-identity --cluster-version=latest "+
 				"--extra-gcloud-flags --enable-stackdriver-kubernetes "+
 				"--no-enable-ip-alias --no-enable-autoupgrade "+
-				"--addons=NodeLocalDNS "+
 				"--test-command=%s/test/e2e-tests.sh "+
 				"--run-tests --extra-gcloud-flags= --logging=NONE "+
 				"--monitoring=NONE", rootDir)),