Created
April 22, 2015 08:22
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unicorn aws opsworks recipe with included EventMachine (used for async_publish with keen.io)
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| # adapted version of https://github.com/aws/opsworks-cookbooks/blob/release-chef-11.10/unicorn/templates/default/unicorn.conf.erb | |
| worker_processes <%= node[:unicorn][:worker_processes] %> | |
| user "<%= @deploy[:user]%>" | |
| working_directory "<%= @deploy[:deploy_to]%>/current" | |
| listen "<%= @deploy[:deploy_to]%>/shared/sockets/unicorn.sock", :backlog => <%= node[:unicorn][:backlog] %>, :tcp_nodelay => <%= node[:unicorn][:tcp_nodelay] %>, :tcp_nopush => <%= node[:unicorn][:tcp_nopush] %>, :tries => <%= node[:unicorn][:tries] %>, :delay => <%= node[:unicorn][:delay] %>, :accept_filter => <%= node[:unicorn][:accept_filter].inspect %> | |
| timeout <%= node[:unicorn][:timeout] %> | |
| pid "<%= @deploy[:deploy_to]%>/shared/pids/unicorn.pid" | |
| stderr_path "<%= @deploy[:deploy_to]%>/shared/log/unicorn.stderr.log" | |
| stdout_path "<%= @deploy[:deploy_to]%>/shared/log/unicorn.stdout.log" | |
| <% @environment.each do |key, value| %> | |
| ENV['<%= key %>'] = "<%= value %>" | |
| <% end %> | |
| preload_app <%= node[:unicorn][:preload_app] %> | |
| GC.copy_on_write_friendly = true if GC.respond_to?(:copy_on_write_friendly=) | |
| # ensure Unicorn doesn't use a stale Gemfile when restarting | |
| # more info: https://willj.net/2011/08/02/fixing-the-gemfile-not-found-bundlergemfilenotfound-error/ | |
| before_exec do |server| | |
| ENV['BUNDLE_GEMFILE'] = "<%= @deploy[:deploy_to]%>/current/Gemfile" | |
| end | |
| 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 | |
| if defined?(ActiveRecord::Base) | |
| ActiveRecord::Base.connection.disconnect! | |
| end | |
| # Before forking, kill the master process that belongs to the .oldbin PID. | |
| # This enables 0 downtime deploys. | |
| old_pid = "<%= @deploy[:deploy_to]%>/shared/pids/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 | |
| end | |
| end | |
| end | |
| after_fork do |server, worker| | |
| # the following is *required* for Rails + "preload_app true", | |
| if defined?(ActiveRecord::Base) | |
| ActiveRecord::Base.establish_connection | |
| end | |
| # if preload_app is true, then you may also want to check and | |
| # restart any other shared sockets/descriptors such as Memcached, | |
| # and Redis. TokyoCabinet file handles are safe to reuse | |
| # between any number of forked children (assuming your kernel | |
| # correctly implements pread()/pwrite() system calls) | |
| if defined?(EventMachine) | |
| unless EventMachine.reactor_running? && EventMachine.reactor_thread.alive? | |
| if EventMachine.reactor_running? | |
| EventMachine.stop_event_loop | |
| EventMachine.release_machine | |
| EventMachine.instance_variable_set("@reactor_running",false) | |
| end | |
| Thread.new { EventMachine.run } | |
| end | |
| end | |
| Signal.trap("INT") { EventMachine.stop } | |
| Signal.trap("TERM") { EventMachine.stop } | |
| end |
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