Prepare for public release

docker-node

@@ -0,0 +1,17 @@
+#!/bin/bash
+# this command helper depends on key-based (passwordless) SSH access by the current user to each of the docker swarm nodes.
+NODE_HOST=$1; shift;
+
+nc -zvw3 $NODE_HOST 22 &> /dev/null;
+PING_RESULT=$?
+
+if [ $PING_RESULT != 0 ]; then
+  echo
+  echo "Host '$NODE_HOST' not reachable."
+  exit 2
+fi
+
+# connect to the docker host through SSH
+export DOCKER_HOST="ssh://$(whoami)@$NODE_HOST.$(hostname -d)"
+# execute the command
+docker $@