godrb watch file for Adhearsion under JRuby

README.md

Adhearsion-JRuby monitored by god

A sample godrb watch for Adhearsion JRuby.

Caveats

• Note that godrb does not currently work under JRuby. You'll need a ruby manager like rvm or rbenv. That way, you can run your god under CRuby and your adhearsion app under JRuby.
• This script is not perfect. It occasionally produces empty or corrupt PID files. -_-
• This script makes a few assumptions.. tweak as necessary if any of this is inaccurate:
  • It assumes you use rvm
  • It assumes you use CentOS 6
  • It assumes that you have Java installed at /opt/jdk1.7.0_51.
  • It assumes you use capistrano, with a directory structure like so:

/srv
└── phone
    └── apptastic
        ├── current         # Home of your app.  Gemfile, .ruby-version, etc. should live here.
        │   ├── Gemfile
        │   ├── Gemfile.lock
        │   ├── Procfile
        │   └── config
        │       └── god
        │           └── adhearsion.god
        └── shared
            ├── config
            │   └── god_environment.yml
            ├── log         # Where logs will be written
            └── pids        # Where adhearsion.pid will be written

adhearsion.god

# encoding: utf-8

# run with:   rvmsudo god -c /srv/phone/myapp/current/config/god/adhearsion.god
# debug with: rvmsudo god quit && rvmsudo god -c /srv/phone/myapp/current/config/all.god -D

@deploy_path = '/srv/phone/myapp'
@shared_path = File.join @deploy_path, 'shared'
@app_path = File.join @deploy_path, 'current'
@log_path = File.join @shared_path, 'log'
@pid_path = File.join @shared_path, 'pids'
@pid_file = File.join @pid_path, 'adhearsion.pid'
@god_env = YAML.load_file("#{@shared_path}/config/god_environment.yml")

God.watch do |w|
  w.name  = "myapp-adhearsion"
  w.group = "myapp"
  w.env   = @god_env['environment']

  w.interval      = 30.seconds
  w.start_grace   = 3.minutes
  w.stop_timeout  = 8.hours

  w.dir     = @app_path
  w.log     = "#{@log_path}/ahnctl_command.log"

  w.start   = ahnctl_start

  w.pid_file = @pid_file
  w.behavior :clean_pid_file

  w.uid = "ahn"
  w.gid = "ahn"
end

# Start Adhearsion in JRuby, while building a pidfile as soon as possible.
def ahnctl_start
  "#{exec_ahn_async} && #{wait} && #{save_pid}"
end

# Run start in the background, since it is not daemonized.
# This also makes it easier for us to nab the PID.
def exec_ahn_async
  "( #{exec_ahn} & )"
end

# Start Adhearsion
def exec_ahn
  exec_ahn = 'rvm $(cat .ruby-version) exec bundle exec ahn start .'

  # Add action-specific options to the invoked command
  exec_ahn << ' --no-console'
end

# Wait a moment to ensure that Java has spawned.
def wait
  'sleep 1'
end

# Save the process id / PID
def save_pid
  "ps -fp $(/sbin/pidof java) | grep 'ahn start' | awk '{print $2}' > #{@pid_file}"
end

god_environment.yml

# Please Note: Your changes to these values will NOT be realized merely
# restarting Adhearsion.
#
# You must *first* restart god completely in order for these env variables to be
# refreshed...
#   sudo su -
#   sudo /sbin/service god restart
#   rvmsudo god restart myapp-adhearsion

environment:
  AHN_ENV: production
  AHN_PLATFORM_ENVIRONMENT: production
  AHN_PUNCHBLOCK_USERNAME: (username...)
  AHN_PUNCHBLOCK_PASSWORD: (password...)
  AHN_PUNCHBLOCK_HOST: (hostname...)
  JRUBY_OPTS:
    --server
    -J-Xmn512m
    -J-Xms2048m
    -J-Xmx2048m
  JAVA_HOME: /opt/jdk1.7.0_51