36 lines
1.2 KiB
Ruby
36 lines
1.2 KiB
Ruby
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APP_DIR="."
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UNICORN_DIR="#{APP_DIR}"
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UNICORN_WORKER="4"
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UNICORN_TIMEOUT="30"
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RAILS_PID_DIR="#{APP_DIR}/tmp/pids"
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RAILS_LOG_DIR="#{APP_DIR}/log"
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worker_processes UNICORN_WORKER.to_i
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working_directory UNICORN_DIR
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timeout UNICORN_TIMEOUT.to_i
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pid "#{RAILS_PID_DIR}/unicorn.pid"
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stderr_path "#{RAILS_LOG_DIR}/unicorn_error.log"
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stdout_path "#{RAILS_LOG_DIR}/unicorn_access.log"
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before_fork do |server, worker|
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##
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# When sent a USR2, Unicorn will suffix its pidfile with .oldbin and
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# immediately start loading up a new version of itself (loaded with a new
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# version of our app). When this new Unicorn is completely loaded
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# it will begin spawning workers. The first worker spawned will check to
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# see if an .oldbin pidfile exists. If so, this means we've just booted up
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# a new Unicorn and need to tell the old one that it can now die. To do so
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# we send it a QUIT.
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#
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# Using this method we get 0 downtime deploys.
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old_pid = "#{RAILS_PID_DIR}/unicorn.pid.oldbin"
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if File.exists?(old_pid) && server.pid != old_pid
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begin
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Process.kill("QUIT", File.read(old_pid).to_i)
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rescue Errno::ENOENT, Errno::ESRCH
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# someone else did our job for us
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end
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end
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end
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