ansible-roles/redmine/templates/unicorn.conf.rb.j2

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app_dir = "{{ redmine_glob_root_dir }}/{{ redmine_inst_dir }}"
working_directory app_dir
pid "{{ unicorn_pid_file }}"
preload_app true
timeout {{ unicorn_timeout }}
worker_processes {{ unicorn_worker_processes }}
# Log files
stderr_path "{{ unicorn_log_dir }}/unicorn.stderr.log"
stdout_path "{{ unicorn_log_dir }}/unicorn.stdout.log"
GC.respond_to?(:copy_on_write_friendly=) and GC.copy_on_write_friendly = true
before_fork do |server, worker|
# the following is highly recomended for Rails + "preload_app true"
# as there's no need for the master process to hold a connection
defined?(ActiveRecord::Base) and ActiveRecord::Base.connection.disconnect!
##
# 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|
# Unicorn master loads the app then forks off workers - because of the way
# Unix forking works, we need to make sure we aren't using any of the parent's
# sockets, e.g. db connection
defined?(ActiveRecord::Base) and ActiveRecord::Base.establish_connection
# Redis and Memcached would go here but their connections are established
# on demand, so the master never opens a socket
#start the worker on port 4000, 4001, 4002 etc...
addr = "{{ unicorn_listen_address }}:#{ {{ unicorn_listen_port }} + worker.nr}"
# infinite tries to start the worker
server.listen(addr, :tries => 10, :delay => 5, :backlog => 128)
end