Initial commit of content.

deployment/start

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+#!/bin/bash
+
+# Make the site live again, for instance by tweaking a .htaccess file
+# or starting a node server. In this example we also set up a
+# data/port file so that sc-proxy.js can figure out what port
+# to forward traffic to for this site. The idea is that every
+# folder in /var/webapps represents a separate project with a separate
+# node process, each listening on a specific port, and they all
+# need traffic forwarded from a reverse proxy server on port 80
+
+# Useful for debugging
+#set -x verbose
+
+# Express should not reveal information on errors,
+# also optimizes Express performance
+export NODE_ENV=production
+
+if [ ! -f "app.js" ]; then
+  echo "I don't see app.js in the current directory."
+  exit 1
+fi
+
+# Assign a port number if we don't yet have one
+
+if [ -f "data/port" ]; then
+  PORT=`cat data/port`
+else
+  # No port set yet for this site. Scan and sort the existing port numbers if any,
+  # grab the highest existing one
+  PORT=`cat ../../../*/data/port 2>/dev/null | sort -n | tail -1`
+  if [ "$PORT" == "" ]; then
+  	echo "First app ever, assigning port 3000"
+  	PORT=3000
+  else
+    # Bash is much nicer than sh! We can do math without tears!
+    let PORT+=1
+  fi
+  echo $PORT > data/port
+  echo "First startup, chose port $PORT for this site"
+fi
+
+# Run the app via 'forever' so that it restarts automatically if it fails
+# Use `pwd` to make sure we have a full path, forever is otherwise easily confused
+# and will stop every server with the same filename
+
+# Use a "for" loop. A classic single-port file will do the
+# right thing, but so will a file with multiple port numbers
+# for load balancing across multiple cores
+for port in $PORT
+do
+  export PORT=$port
+  forever --minUptime=1000 --spinSleepTime=10000 -o data/console.log -e data/error.log start `pwd`/app.js && echo "Site started"
+done
+
+# Run the app without 'forever'. Record the process id so 'stop' can kill it later.
+# We recommend installing 'forever' instead for node apps. For non-node apps this code
+# may be helpful
+#
+# node app.js >> data/console.log 2>&1 &
+# PID=$!
+# echo $PID > data/pid
+#	
+#echo "Site started"