Bluepill used at Halftoneapp.com

Bluepill Uncorn Config File

#
# Halftoneapp.com Sample Bluepill Configuration File
# Read more at: http://blog.halftoneapp.com
#

# Set paths
home_dir = "/home/railsapp"
rails_shared = "#{home_dir}/app/shared"
unicorn_path = "/path/to/unicorn_rails"

# Set environment variables
rails_env = ENV['RAILS_ENV'] || 'production'
rails_root = ENV['RAILS_ROOT'] || "#{home_dir}/app/current"


Bluepill.application("railsapp", :log_file => rails_root+"/log/bluepill.log") do |app|
        app.process("unicorn") do |process|

                ## THE APPLICATION ## 
                ## -----------------

                # Set Unicorn PID file
                process.pid_file = File.join(rails_root, 'tmp', 'pids', 'unicorn.pid')
                process.working_dir = "#{rails_root}"

                # Set the command line argument to START Unicorn.
                process.start_command = "#{unicorn_path} -Dc #{home_dir}/unicorn.conf.rb -E #{rails_env}"

                # Set the command line argument to STOP Unicorn.
                process.stop_command = "kill -QUIT {{PID}}"

                # Set the command line argument to RESTART Unicorn. (The USR2 causes the master to re-create itself and spawn a new worker pool)
                process.restart_command = "kill -USR2 {{PID}}"

                ## GRACE PERIODS ##
                ## -----------------

                # After we start the app, how long should we wait until we start monitoring the application
                process.start_grace_time = 3.seconds

                # Same as above, grace period after we've restarted the application
                process.restart_grace_time = 8.seconds

                ## APPLICATION CHECKS
                ## -----------------
                process.checks :cpu_usage, :every => 10.seconds, :below => 30, :times => 3
                process.checks :mem_usage, :every => 10.seconds, :below => 500.megabytes, :times => [3,5]

                ## SETUP UNICORN CHILDREN MONITORING
                ## -----------------
                process.monitor_children do |child_process|
                        child_process.checks :cpu_usage, :every => 10, :below => 25, :times => 3
                        child_process.checks :mem_usage, :every => 10, :below => 200.megabytes, :times => [3, 5]
                        child_process.stop_command = "kill -QUIT {{PID}}"
                end
        end
end