feat(contrib): allow private networked regions

contrib/digitalocean/provision-do-cluster.sh

@@ -5,6 +5,13 @@
 
 set -e
 
+listcontains() {
+  for i in $1; do
+    [[ $i = $2 ]] && echo $i && return 0
+  done
+  return 1
+}
+
 THIS_DIR=$(cd $(dirname $0); pwd) # absolute path
 CONTRIB_DIR=$(dirname $THIS_DIR)
 
@@ -25,6 +32,18 @@ if [ -z "$DEIS_NUM_INSTANCES" ]; then
     DEIS_NUM_INSTANCES=3
 fi
 
+regions_with_private_networking=(4 5 6 7)
+if ! listcontains "$regions_with_private_networking" "$2";
+then
+    echo_red "Invalid region. Please supply a region with private networking support."
+    echo_red "Valid regions are:"
+    echo_red "4: New York 2"
+    echo_red "5: Amsterdam 2"
+    echo_red "6: Singapore 1"
+    echo_red "7: London 1"
+    exit 1
+fi
+
 # check that the CoreOS user-data file is valid
 $CONTRIB_DIR/util/check-user-data.sh