--- /dev/null
+#!/bin/bash
+
+if [[ $# -ne 2 ]]; then
+ echo "Usage: wait-for-port hostname port" >&2
+ exit 1
+fi
+
+host=$1
+port=$2
+
+echo "Waiting for $host port $port open"
+until telnet $host $port </dev/null 2>/dev/null | grep -q '^Connected'; do
+ sleep 1
+done
+
+echo "$host port $port is open"
+
+exit 0