30 lines
1 KiB
Ruby
30 lines
1 KiB
Ruby
# Copyright (C) 2012-2021 Zammad Foundation, http://zammad-foundation.org/
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worker_processes 4
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timeout 30
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stderr_path 'log/unicorn_error.log'
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stdout_path 'log/unicorn_access.log'
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pid 'tmp/pids/unicorn.pid'
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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 = 'tmp/pids/unicorn.pid.oldbin'
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if File.exist?(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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logger.info 'Unicorn master already killed. 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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