Add script to create/delete multiple GCE instances

- This script outputs the IP address array that can be used
  with start_nodes script to launch multinode demo
- Changes to start_nodes to compress files for rsync

multinode-demo/gce_multinode.sh

@@ -0,0 +1,80 @@
+#!/bin/bash
+
+command=$1
+prefix=
+num_nodes=
+out_file=
+image_name="ubuntu-16-04-cuda-9-2-new"
+
+shift
+
+usage() {
+  exitcode=0
+  if [[ -n "$1" ]]; then
+    exitcode=1
+    echo "Error: $*"
+  fi
+  cat <<EOF
+usage: $0 <create|delete> <-p prefix> <-n num_nodes> <-o file> [-i image-name]
+
+Manage a GCE multinode network
+
+ create|delete    - Create or delete the network
+ -p prefix        - A common prefix for node names, to avoid collision
+ -n num_nodes     - Number of nodes
+ -o out_file      - Used for create option. Outputs an array of IP addresses
+                    of new nodes to the file
+ -i image_name    - Existing image on GCE (default $image_name)
+
+EOF
+  exit $exitcode
+}
+
+while getopts "h?p:i:n:o:" opt; do
+  case $opt in
+  h | \?)
+    usage
+    ;;
+  p)
+    prefix=$OPTARG
+    ;;
+  i)
+    image_name=$OPTARG
+    ;;
+  o)
+    out_file=$OPTARG
+    ;;
+  n)
+    num_nodes=$OPTARG
+    ;;
+  *)
+    usage "Error: unhandled option: $opt"
+    ;;
+  esac
+done
+
+set -e
+
+[[ -n $command ]] || usage "Need a command (create|delete)"
+
+[[ -n $prefix ]] || usage "Need a prefix for GCE instance names"
+
+[[ -n $num_nodes ]] || usage "Need number of nodes"
+
+nodes=()
+for i in $(seq 1 "$num_nodes"); do
+  nodes+=("$prefix$i")
+done
+
+if [[ $command == "create" ]]; then
+  [[ -n $out_file ]] || usage "Need an outfile to store IP Addresses"
+
+  ip_addr_list=$(gcloud beta compute instances create "${nodes[@]}" --zone=us-west1-b --tags=testnet \
+    --image="$image_name" | awk '/RUNNING/ {print $5}')
+
+  echo "ip_addr_array=($ip_addr_list)" >"$out_file"
+elif [[ $command == "delete" ]]; then
+  gcloud beta compute instances delete "${nodes[@]}"
+else
+  usage "Unknown command: $command"
+fi

multinode-demo/start_nodes.sh

@@ -58,16 +58,16 @@ for ip_addr in "${ip_addr_array[@]}"; do
 
   # Deploy build and scripts to remote node
   ssh "$remote_user@$ip_addr" 'mkdir ~/solana'
-  rsync -r -av ~/.cargo/bin "$remote_user"@"$ip_addr":~/.cargo
-  rsync -r -av ./multinode-demo "$remote_user"@"$ip_addr":~/solana/
+  rsync -vPrz ~/.cargo/bin "$remote_user"@"$ip_addr":~/.cargo
+  rsync -vPrz ./multinode-demo "$remote_user"@"$ip_addr":~/solana/
 
   # If provided, deploy SSH keys
   if [[ -z $ssh_keys ]]; then
     echo "skip copying the ssh keys"
   else
-    rsync -r -av "$ssh_keys"/id_rsa "$remote_user@$ip_addr":~/.ssh/
-    rsync -r -av "$ssh_keys"/id_rsa.pub "$remote_user@$ip_addr":~/.ssh/
-    rsync -r -av "$ssh_keys"/id_rsa.pub "$remote_user@$ip_addr":~/.ssh/authorized_keys
+    rsync -vPrz "$ssh_keys"/id_rsa "$remote_user@$ip_addr":~/.ssh/
+    rsync -vPrz "$ssh_keys"/id_rsa.pub "$remote_user@$ip_addr":~/.ssh/
+    rsync -vPrz "$ssh_keys"/id_rsa.pub "$remote_user@$ip_addr":~/.ssh/authorized_keys
     ssh -n -f "$remote_user@$ip_addr" 'chmod 600 ~/.ssh/authorized_keys ~/.ssh/id_rsa'
   fi