105 lines
4.3 KiB
Ruby
105 lines
4.3 KiB
Ruby
# Sample verbose configuration file for Unicorn (not Rack)
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#
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# This configuration file documents many features of Unicorn
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# that may not be needed for some applications. See
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# http://unicorn.bogomips.org/examples/unicorn.conf.minimal.rb
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# for a much simpler configuration file.
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#
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# See http://unicorn.bogomips.org/Unicorn/Configurator.html for complete
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# documentation.
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# Use at least one worker per core if you're on a dedicated server,
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# more will usually help for _short_ waits on databases/caches.
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worker_processes 2
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# Since Unicorn is never exposed to outside clients, it does not need to
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# run on the standard HTTP port (80), there is no reason to start Unicorn
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# as root unless it's from system init scripts.
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# If running the master process as root and the workers as an unprivileged
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# user, do this to switch euid/egid in the workers (also chowns logs):
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# user "unprivileged_user", "unprivileged_group"
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# Help ensure your application will always spawn in the symlinked
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# "current" directory that Capistrano sets up.
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# listen on both a Unix domain socket and a TCP port,
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# we use a shorter backlog for quicker failover when busy
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listen "127.0.0.1:3000", :tcp_nopush => true
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timeout 60
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# By default, the Unicorn logger will write to stderr.
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# Additionally, ome applications/frameworks log to stderr or stdout,
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# so prevent them from going to /dev/null when daemonized here:
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# combine Ruby 2.0.0dev or REE with "preload_app true" for memory savings
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# http://rubyenterpriseedition.com/faq.html#adapt_apps_for_cow
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preload_app true
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GC.respond_to?(:copy_on_write_friendly=) and
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GC.copy_on_write_friendly = true
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# Enable this flag to have unicorn test client connections by writing the
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# beginning of the HTTP headers before calling the application. This
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# prevents calling the application for connections that have disconnected
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# while queued. This is only guaranteed to detect clients on the same
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# host unicorn runs on, and unlikely to detect disconnects even on a
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# fast LAN.
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check_client_connection false
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# local variable to guard against running a hook multiple times
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run_once = true
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before_fork do |server, worker|
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# the following is highly recomended for Rails + "preload_app true"
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# as there's no need for the master process to hold a connection
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defined?(ActiveRecord::Base) and
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ActiveRecord::Base.connection.disconnect!
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# Occasionally, it may be necessary to run non-idempotent code in the
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# master before forking. Keep in mind the above disconnect! example
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# is idempotent and does not need a guard.
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if run_once
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# do_something_once_here ...
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run_once = false # prevent from firing again
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end
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# The following is only recommended for memory/DB-constrained
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# installations. It is not needed if your system can house
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# twice as many worker_processes as you have configured.
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#
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# # This allows a new master process to incrementally
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# # phase out the old master process with SIGTTOU to avoid a
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# # thundering herd (especially in the "preload_app false" case)
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# # when doing a transparent upgrade. The last worker spawned
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# # will then kill off the old master process with a SIGQUIT.
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old_pid = "#{server.config[:pid]}.oldbin"
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if old_pid != server.pid
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begin
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sig = (worker.nr + 1) >= server.worker_processes ? :QUIT : :TTOU
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Process.kill(sig, File.read(old_pid).to_i)
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rescue Errno::ENOENT, Errno::ESRCH
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end
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end
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#
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# Throttle the master from forking too quickly by sleeping. Due
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# to the implementation of standard Unix signal handlers, this
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# helps (but does not completely) prevent identical, repeated signals
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# from being lost when the receiving process is busy.
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sleep 1
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end
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after_fork do |server, worker|
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# per-process listener ports for debugging/admin/migrations
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# addr = "127.0.0.1:#{9293 + worker.nr}"
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# server.listen(addr, :tries => -1, :delay => 5, :tcp_nopush => true)
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# the following is *required* for Rails + "preload_app true",
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defined?(ActiveRecord::Base) and
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ActiveRecord::Base.establish_connection
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# if preload_app is true, then you may also want to check and
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# restart any other shared sockets/descriptors such as Memcached,
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# and Redis. TokyoCabinet file handles are safe to reuse
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# between any number of forked children (assuming your kernel
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# correctly implements pread()/pwrite() system calls)
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end
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