Add deploy.sh script helper

hack/README.md

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+
+# Hacks
+
+This directory is a collection of scripts & utilities that can assist developers
+and users interested in testing and experimenting with Trento.
+
+## deploy.sh
+`deploy.sh` is a very simple script that will attempt to copy the `trento` binary
+and the `consul` binary to a remote server and start both services
+
+### Requirements
+The machines that we are deploying to require to have `rsync` as well as a running
+SSH server.
+
+### Usage
+`./deploy.sh [username@]<target-server-ip> <consul-ip> [deploy-agent*|deploy-web]`
+
+  - `[username]@<target-server-ip>`
+    The IP address of the host where we are deploying `trento` and `consul` on.
+
+  - `<consul-ip>`
+    The IP of the consul server that we are connecting to. When `deploy-web` is
+    used in the next field, this is ignored.
+
+  - `[deploy-agent|deploy-web]`
+    `deploy-agent` causes to deploy the `consul` and `trento` agents 
+    while
+    `deploy-web` causes to deploy the web server as well as a `consul` server instance

hack/deploy.sh

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+#!/bin/bash
+TARGET_HOST=$1
+CONSUL_HOST=$2
+ACTION=$3
+TRENTO_BIN="trento"
+CONSUL_BIN="consul"
+TRENTO_PATH="/srv/trento/"
+CONSUL_PATH="/srv/consul/"
+EXAMPLES_PATH="$TRENTO_PATH/examples"
+TARGET_USER="root"
+CONSUL_DATA_DIR="consul-agent-data"
+
+# Abort when any command in the script fails
+set -e
+
+# Abort if no input params
+if [ $# -lt 2 ] ; then
+    echo "Usage: ./deploy.sh <target-server-ip> <consul-ip> [deploy-agent*|deploy-web]"
+    exit 1
+fi
+
+# If no action is provided, we assume deploy-agent
+if test "X$ACTION" == "X" ; then
+    ACTION="deploy-agent"
+fi
+
+stop_process () {
+    echo "Checking if process $2 is running in $1..."
+    while ssh "$TARGET_USER@$TARGET_HOST" pgrep -x "$2" > /dev/null
+    do
+        echo "Attempting to stop $2 process on $1..."
+        ssh "$TARGET_USER@$TARGET_HOST" killall "$2"
+        sleep 2
+    done
+}
+
+# Stop old processes
+stop_process "$TARGET_HOST" "trento"
+stop_process "$TARGET_HOST" "consul"
+
+# Create directory structure if it doesn't exist
+ssh "$TARGET_USER@$TARGET_HOST" mkdir -p "$TRENTO_PATH" || true
+ssh "$TARGET_USER@$TARGET_HOST" mkdir -p "$CONSUL_PATH/consul.d" || true
+
+# Upload new binaries & examples
+rsync -av ./$TRENTO_BIN "$TARGET_USER@$TARGET_HOST:/$TRENTO_PATH"
+rsync -av ./$CONSUL_BIN "$TARGET_USER@$TARGET_HOST:/$CONSUL_PATH"
+rsync -av ./examples "$TARGET_USER@$TARGET_HOST:/$EXAMPLES_PATH"
+
+# Give them execution permission
+ssh "$TARGET_USER@$TARGET_HOST" chmod +x "$TRENTO_PATH/$TRENTO_BIN"
+ssh "$TARGET_USER@$TARGET_HOST" chmod +x "$CONSUL_PATH/$CONSUL_BIN"
+
+# Start 'em
+if [ "$ACTION" = "deploy-agent" ] ; then
+	ssh "$TARGET_USER@$TARGET_HOST" -f "nohup $CONSUL_PATH/$CONSUL_BIN agent -bind=$TARGET_HOST -data-dir=$CONSUL_DATA_DIR -config-dir=$CONSUL_PATH/consul.d -retry-join=$CONSUL_HOST -ui > /dev/null 2>&1"
+	ssh "$TARGET_USER@$TARGET_HOST" -f "nohup $TRENTO_PATH/$TRENTO_BIN agent start -n $TARGET_HOST --config-dir=$CONSUL_PATH/consul.d --consul-template=$EXAMPLES_PATH/trento-config.tpl $EXAMPLES_PATH/azure-rules.yaml > /dev/null 2>&1"
+elif [ "$ACTION" = "deploy-web" ] ; then
+	ssh "$TARGET_USER@$TARGET_HOST" -f "nohup $CONSUL_PATH/$CONSUL_BIN agent -server -bootstrap-expect=1 -bind=$TARGET_HOST -data-dir=$CONSUL_DATA_DIR -ui > /dev/null 2>&1"
+	ssh "$TARGET_USER@$TARGET_HOST" -f "nohup $TRENTO_PATH/$TRENTO_BIN web serve > /dev/null 2>&1"
+fi