1.4.redmine unicorn.rb

# Sample verbose configuration file for Unicorn (not Rack)

#

# This configuration file documents many features of Unicorn

# that may not be needed for some applications. See

# http://unicorn.bogomips.org/examples/unicorn.conf.minimal.rb

# for a much simpler configuration file.

#

# See http://unicorn.bogomips.org/Unicorn/Configurator.html for complete

# documentation.

# Use at least one worker per core if you're on a dedicated server,

# more will usually help for _short_ waits on databases/caches.

#unicorn工作进程数设置：网上的教程里一般建议设为CPU核心数，这个建议是有前提的，前提是你这是一台专用服务器。一般来说对于redmine这种服务器，上面还会跑其它应用，而且redmine项目组的成员也不会很多，配置2个工作进程足够了。要知道加上master进程unicorn就有3个进程了，而且unicorn比较吃内存。。。

worker_processes 2

# Since Unicorn is never exposed to outside clients, it does not need to

# run on the standard HTTP port (80), there is no reason to start Unicorn

# as root unless it's from system init scripts.

# If running the master process as root and the workers as an unprivileged

# user, do this to switch euid/egid in the workers (also chowns logs):

# 进程身份/组

user "redmine", "redmine"

# Help ensure your application will always spawn in the symlinked

# "current" directory that Capistrano sets up.

working_directory "/home/redmine" # available in 0.94.0+

# listen on both a Unix domain socket and a TCP port,

# we use a shorter backlog for quicker failover when busy

listen "/home/redmine/unicorn_redmine.sock", :backlog => 64

# 监听端口：测试运行redmine正常了，会将此注释掉，通过nginx来访问unicorn_redmine.sock的方式提供服务(这样暴露端口更少，更安全【理论上 ^^】)

listen 8080, :tcp_nopush => true

# nuke workers after 30 seconds instead of 60 seconds (the default)

timeout 30

# feel free to point this anywhere accessible on the filesystem

pid "/home/redmine/unicorn_redmine.pid"

# By default, the Unicorn logger will write to stderr.

# Additionally, ome applications/frameworks log to stderr or stdout,

# so prevent them from going to /dev/null when daemonized here:

stderr_path "/home/redmine/log/unicorn.stderr.redmine.log"

stdout_path "/home/redmine/log/unicorn.stdout.redmine.log"

# combine Ruby 2.0.0+ with "preload_app true" for memory savings

preload_app true

# Enable this flag to have unicorn test client connections by writing the

# beginning of the HTTP headers before calling the application.  This

# prevents calling the application for connections that have disconnected

# while queued.  This is only guaranteed to detect clients on the same

# host unicorn runs on, and unlikely to detect disconnects even on a

# fast LAN.

check_client_connection false

# local variable to guard against running a hook multiple times

run_once = true

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

  defined?(ActiveRecord::Base) and

    ActiveRecord::Base.connection.disconnect!

  # Occasionally, it may be necessary to run non-idempotent code in the

  # master before forking.  Keep in mind the above disconnect! example

  # is idempotent and does not need a guard.

  if run_once

    # do_something_once_here ...

    run_once = false # prevent from firing again

  end

  # The following is only recommended for memory/DB-constrained

  # installations.  It is not needed if your system can house

  # twice as many worker_processes as you have configured.

  #

  # # This allows a new master process to incrementally

  # # phase out the old master process with SIGTTOU to avoid a

  # # thundering herd (especially in the "preload_app false" case)

  # # when doing a transparent upgrade.  The last worker spawned

  # # will then kill off the old master process with a SIGQUIT.

  # old_pid = "#{server.config[:pid]}.oldbin"

  # if old_pid != server.pid

  #   begin

  #     sig = (worker.nr + 1) >= server.worker_processes ? :QUIT : :TTOU

  #     Process.kill(sig, File.read(old_pid).to_i)

  #   rescue Errno::ENOENT, Errno::ESRCH

  #   end

  # end

  #

  # Throttle the master from forking too quickly by sleeping.  Due

  # to the implementation of standard Unix signal handlers, this

  # helps (but does not completely) prevent identical, repeated signals

  # from being lost when the receiving process is busy.

  # sleep 1

end

after_fork do |server, worker|

  # per-process listener ports for debugging/admin/migrations

  # addr = "127.0.0.1:#{9293 + worker.nr}"

  # server.listen(addr, :tries => -1, :delay => 5, :tcp_nopush => true)

  # the following is *required* for Rails + "preload_app true",

  defined?(ActiveRecord::Base) and

    ActiveRecord::Base.establish_connection

  # 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)

end