anchor.diff:  [[cloud-gce-usage-discovery-port-create]]
   ===== When creating instance
   
  -Add `--metadata=es_port:9301` option:
  +Add `--metadata es_port=9301` option:
   
   [source,sh]
   --------------------------------------------------
   # when creating first instance
  -gcutil addinstance myesnode1 \
  -       --service_account_scope=compute-rw,storage-full \
  -       --persistent_boot_disk \
  -       --metadata=es_port:9301
  +gcloud compute instances create myesnode1 \
  +       --scopes=compute-rw,storage-full \
  +       --metadata es_port=9301
   
   # when creating an instance from an image
  -gcutil addinstance --image=elasticsearch-1-0-0-RC1 \
  -       --kernel=projects/google/global/kernels/gce-v20130603 myesnode2 \
  -       --zone europe-west1-a --machine_type f1-micro --service_account_scope=compute-rw \
  -       --persistent_boot_disk --metadata=es_port:9301
  +gcloud compute instances create myesnode2 --image=elasticsearch-1-0-0-RC1 \
  +       --zone europe-west1-a --machine-type f1-micro --scopes=compute-rw \
  +       --metadata es_port=9301
   --------------------------------------------------
   
   [[cloud-gce-usage-discovery-port-run]]
  
positive.code: gsutil cp /tmp/e4686d7f5bf904a924ae0cfeb58d0827c6d5b966.image.tar.gz gs://esimage
  
  # Then add your image to images collection:
  gcutil addimage elasticsearch-1-2-1 gs://esimage/e4686d7f5bf904a924ae0cfeb58d0827c6d5b966.image.tar.gz
  
  # If the previous command did not work for you, logout from your instance
  # and launch the same command from your local machine.
  
negative.code: 
  [source,sh]
  --------------------------------------------------
  gcloud compute instances create myesnode1 --project=es-cloud \
         --scopes=compute-rw \
         --tags=elasticsearch,dev
  --------------------------------------------------
  
  