Make it possible to run node e2e with GCI via make

Signed-off-by: Vishnu kannan <vishnuk@google.com>

Makefile

@@ -157,6 +157,7 @@ test-e2e: ginkgo generated_files
 #  IMAGES.  Defaults to "kubernetes-node-e2e-images".
 #  INSTANCE_PREFIX: For REMOTE=true only.  Instances created from images will
 #    have the name "${INSTANCE_PREFIX}-${IMAGE_NAME}".  Defaults to "test".
+#  INSTANCE_METADATA: For REMOTE=true and running on GCE only.
 #
 # Example:
 #   make test-e2e-node FOCUS=Kubelet SKIP=container

docs/devel/e2e-node-tests.md

@@ -51,6 +51,7 @@ Why run tests *Locally*?  Much faster than running tests Remotely.
 Prerequisites:
 - [Install etcd](https://github.com/coreos/etcd/releases) on your PATH
   - Verify etcd is installed correctly by running `which etcd`
+  - Or make etcd binary available and executable at `/tmp/etcd`
 - [Install ginkgo](https://github.com/onsi/ginkgo) on your PATH
   - Verify ginkgo is installed correctly by running `which ginkgo`
 

hack/make-rules/test-e2e-node.sh

@@ -34,6 +34,7 @@ delete_instances=${DELETE_INSTANCES:-"false"}
 run_until_failure=${RUN_UNTIL_FAILURE:-"false"}
 list_images=${LIST_IMAGES:-"false"}
 test_args=${TEST_ARGS:-""}
+metadata=${INSTANCE_METADATA:-""}
 
 if  [[ $list_images == "true" ]]; then
   gcloud compute images list --project="${image_project}" | grep "e2e-node"
@@ -111,14 +112,14 @@ if [ $remote = true ] ; then
   echo "Images: $images"
   echo "Hosts: $hosts"
   echo "Ginkgo Flags: $ginkgoflags"
-
+  echo "Instance Metadata: $metadata"
   # Invoke the runner
   go run test/e2e_node/runner/run_e2e.go  --logtostderr --vmodule=*=2 --ssh-env="gce" \
     --zone="$zone" --project="$project"  \
     --hosts="$hosts" --images="$images" --cleanup="$cleanup" \
     --results-dir="$artifacts" --ginkgo-flags="$ginkgoflags" \
     --image-project="$image_project" --instance-name-prefix="$instance_prefix" --setup-node="true" \
-    --delete-instances="$delete_instances" --test_args="$test_args"
+    --delete-instances="$delete_instances" --test_args="$test_args" --instance-metadata="$metadata"
   exit $?
 
 else

test/e2e_node/e2e_node_suite_test.go

@@ -135,7 +135,9 @@ var _ = AfterSuite(func() {
 func maskLocksmithdOnCoreos() {
 	data, err := ioutil.ReadFile("/etc/os-release")
 	if err != nil {
-		glog.Fatalf("Could not read /etc/os-release: %v", err)
+		// Not all distros contain this file.
+		glog.Infof("Could not read /etc/os-release: %v", err)
+		return
 	}
 	if bytes.Contains(data, []byte("ID=coreos")) {
 		if output, err := exec.Command("sudo", "systemctl", "mask", "--now", "locksmithd").CombinedOutput(); err != nil {

test/e2e_node/e2e_service.go

@@ -57,6 +57,8 @@ type logFileData struct {
 const (
 	// This is consistent with the level used in a cluster e2e test.
 	LOG_VERBOSITY_LEVEL = "4"
+	// Etcd binary is expected to either be available via PATH, or at this location.
+	defaultEtcdPath = "/tmp/etcd"
 )
 
 func newE2eService(nodeName string, cgroupsPerQOS bool) *e2eService {
@@ -179,7 +181,16 @@ func (es *e2eService) startEtcd() (*killCmd, error) {
 		return nil, err
 	}
 	es.etcdDataDir = dataDir
-	cmd := exec.Command("etcd")
+	etcdPath, err := exec.LookPath("etcd")
+	if err != nil {
+		glog.Infof("etcd not found in PATH. Defaulting to %s...", defaultEtcdPath)
+		_, err = os.Stat(defaultEtcdPath)
+		if err != nil {
+			return nil, fmt.Errorf("etcd binary not found")
+		}
+		etcdPath = defaultEtcdPath
+	}
+	cmd := exec.Command(etcdPath)
 	// Execute etcd in the data directory instead of using --data-dir because the flag sometimes requires additional
 	// configuration (e.g. --name in version 0.4.9)
 	cmd.Dir = es.etcdDataDir

test/e2e_node/jenkins/gci-init.yaml

@@ -1,9 +1,9 @@
 #cloud-config
 
 runcmd:
+  - mount /tmp /tmp -o remount,exec,suid
   - ETCD_VERSION=v2.2.5
   - curl -L https://github.com/coreos/etcd/releases/download/${ETCD_VERSION}/etcd-${ETCD_VERSION}-linux-amd64.tar.gz -o /tmp/etcd.tar.gz
   - tar xzvf /tmp/etcd.tar.gz -C /tmp
-  - sudo mv /tmp/etcd-${ETCD_VERSION}-linux-amd64/etcd* /usr/local/bin/
-  - sudo chown root:root /usr/local/bin/etcd*
-  - rm -r /tmp/etcd*
+  - cp /tmp/etcd-${ETCD_VERSION}-linux-amd64/etcd* /tmp/
+  - rm -rf /tmp/etcd-${ETCD_VERSION}-linux-amd64/

test/e2e_node/runner/run_e2e.go

@@ -310,7 +310,9 @@ func createInstance(image, imageProject string) (string, error) {
 		},
 	}
 	if *instanceMetadata != "" {
+		glog.V(2).Infof("parsing instance metadata: %q", *instanceMetadata)
 		raw := parseInstanceMetadata(*instanceMetadata)
+		glog.V(3).Infof("parsed instance metadata: %v", raw)
 		i.Metadata = &compute.Metadata{}
 		metadata := []*compute.MetadataItems{}
 		for k, v := range raw {
@@ -422,12 +424,12 @@ func parseInstanceMetadata(str string) map[string]string {
 		}
 		kp := strings.Split(s, "<")
 		if len(kp) != 2 {
-			glog.Errorf("Invalid instance metadata: %q", s)
+			glog.Fatalf("Invalid instance metadata: %q", s)
 			continue
 		}
 		v, err := ioutil.ReadFile(kp[1])
 		if err != nil {
-			glog.Errorf("Failed to read metadata file %q: %v", kp[1], err)
+			glog.Fatalf("Failed to read metadata file %q: %v", kp[1], err)
 			continue
 		}
 		metadata[kp[0]] = string(v)