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Versions: 28
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Contents
##############################################
# Platan.us Sample Unicorn Configuration File
##############################################
# Load rails into the master before forking workers
# for super-fast worker spawn times
preload_app <%= fetch(:unicorn_preload) %>
working_directory "<%= fetch(:current_path) %>"
pid "<%= fetch(:unicorn_pid) %>"
stderr_path "<%= fetch(:current_path) %>/log/unicorn-error.log"
stdout_path "<%= fetch(:current_path) %>/log/unicorn-out.log"
listen "<%= fetch(:app_server_socket) %>"
worker_processes <%= fetch(:unicorn_workers) %>
timeout <%= fetch(:unicorn_workers_timeout) %>
before_fork do |server, worker|
##
# 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.
defined?(ActiveRecord::Base) && ActiveRecord::Base.connection.disconnect!
old_pid = "<%= fetch(:unicorn_pid) %>.oldbin"
if File.exists?(old_pid) && server.pid != old_pid
begin
Process.kill("QUIT", File.read(old_pid).to_i)
rescue Errno::ENOENT, Errno::ESRCH
# someone else did our job for us
puts "Old master already dead"
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
ActiveRecord::Base.establish_connection
end
Version data entries
28 entries across 28 versions & 1 rubygems