Capistrano deployment

initscript.sh

#!/bin/sh

PATH=/bin:/usr/bin:/sbin:/usr/sbin
DAEMON=/a/my-app/current/run.sh
PIDDIR=/a/my-app/current/tmp/pids
PIDFILE="$PIDDIR/my-app.pid"
USER="myuser"

export PATH="${PATH:+$PATH:}/usr/sbin:/sbin"

if [ ! -d $PIDDIR ]; then
  mkdir $PIDDIR
  chown $USER.$USER $PIDDIR
fi

case "$1" in
  start)
    start-stop-daemon --start --quiet --oknodo --background --pidfile $PIDFILE --exec $DAEMON --chuid $USER -- $SERVICES_OPTS
    sleep 5
    $0 status
  ;;

  stop)
    if start-stop-daemon --stop --quiet --pidfile $PIDFILE; then
      exit 0
    else
      exit 1
    fi
  ;;
esac

multistage_deployments_1.rb

set :stages, %w(dev qa staging production)
set :default_stage, "dev"

run.sh

#!/bin/bash

MY_APP_HOME="/applications/my-application/current"
MY_APP_JAR="target/my-application-0.1.0-SNAPSHOT-standalone.jar"

java -Xms512m -Xmx1024m -jar $MY_APP_HOME/$MY_APP_JAR --config $MY_APP_HOME/config/production.clj &
echo $! > $MY_APP_HOME/tmp/pids/my-application.pid
exit 0

server.clj

(ns my-application.server
  (:gen-class))

(defn -main
  [& args]
  (run!))

server_spec.rb

server "username@ec2-111-111-111-111.eu-west-1.compute.amazonaws.com", :app, :primary => true
server "username@ec2-111-111-111-112.eu-west-1.compute.amazonaws.com", :app
server "username@ec2-111-111-111-113.eu-west-1.compute.amazonaws.com", :db
server "username@ec2-111-111-111-114.eu-west-1.compute.amazonaws.com", :web

task_spec_2.rb

task :start do
  deploy.start_master
  deploy.start_slave
end

task_spec_3.rb

task :start_master, :only => { :primary => true } do
  run "APP_MODE=master #{current_release}/script/initscript.sh start"
end

task :start_slave do
  run "APP_MODE=slave #{current_release}/script/initscript.sh start"
end

tasks_spec.rb

namespace :deploy do
  task :restart do
    deploy.restart_app
    deploy.restart_db
    deploy.restart_web
  end

  task :restart_app, :roles => :app do
    # handle app restart
  end

  task :restart_db, :roles => :db do
    # handle db restart
  end

  task :restart_web, :roles => :web do
    # handle web restart
  end
end