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@kidpollo
Created July 26, 2010 20:13
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working_directory '<%= @app_dir %>/current/'
worker_processes <%= @workers %>
listen '<%= @app_dir %>/shared/tmp/pids/<%= @app_name %>.sock', :backlog => 1024
timeout 60
pid "<%= @app_dir %>/shared/tmp/pids/<%= @app_name %>.pid"
# Based on http://gist.github.com/206253
logger Logger.new("log/unicorn.log")
# Load the app into the master before forking workers for super-fast worker spawn times
preload_app true
# some applications/frameworks log to stderr or stdout, so prevent
# them from going to /dev/null when daemonized here:
stderr_path "log/unicorn.stderr.log"
stdout_path "log/unicorn.stdout.log"
# REE - http://www.rubyenterpriseedition.com/faq.html#adapt_apps_for_cow
if GC.respond_to?(:copy_on_write_friendly=)
GC.copy_on_write_friendly = true
end
before_fork do |server, worker|
# the following is recomended for Rails + "preload_app true"
# as there's no need for the master process to hold a connection
if defined?(ActiveRecord::Base)
ActiveRecord::Base.connection.disconnect!
end
##
# When sent a USR2, Unicorn will suffix its pidfile with .oldbin and
# immediately start loading up a new version of itself (loaded with a new
# version of our app). When this new Unicorn is completely loaded
# it will begin spawning workers. The first worker spawned will check to
# see if an .oldbin pidfile exists. If so, this means we've just booted up
# a new Unicorn and need to tell the old one that it can now die. To do so
# we send it a QUIT.
#
# Using this method we get 0 downtime deploys.
old_pid = "#{server.config[:pid]}.oldbin"
if File.exists?(old_pid) && server.pid != old_pid
begin
sig = (worker.nr + 1) >= server.worker_processes ? :QUIT : :TTOU
Process.kill(sig, File.read(old_pid).to_i)
rescue Errno::ENOENT, Errno::ESRCH
# someone else did our job for us
end
end
end
after_fork do |server, worker|
if defined?(ActiveRecord::Base)
ActiveRecord::Base.establish_connection
end
end
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