Nginx + unicorn 运行多个Rails应用程序

PS：第一次写的很详细，可惜发布失败，然后全没了，这是第二次，表示只贴代码，剩下的自己领悟好了，这就是所谓的一鼓作气再而衰吧，希望没有第三次。

版本：

　　ruby 2.1.0

　　rails 4.0.2

　　nginx 1.5.8 mainline version

　　unicorn 4.7.0

 /usr/local/nginx/conf/nginx.conf

user NginxUser NginxGroup;
worker_processes  1;

events {
    worker_connections  1024;
}

http {
    include       mime.types;
    include       /usr/local/nginx/conf/conf.d/*.conf;
    default_type  application/octet-stream;

    sendfile        on;
    #tcp_nopush     on;

    keepalive_timeout  65;

    gzip  on;
}

/usr/local/nginx/conf/conf.d/guorj.conf

upstream guorj_rails_unicorn_server {
  server unix:/tmp/guorj_unicorn.sock fail_timeout=0;
  #server 127.0.0.1:8081 fail_timeout=0;
}
server {
  listen 80;
  client_max_body_size 4G;
  server_name          guorj.com;
  keepalive_timeout    5;
  root                 /home/NginxUser/www/guorj/public;
  access_log           /home/NginxUser/www/guorj/log/nginx_access.log;
  error_log            /home/NginxUser/www/guorj/log/nginx_error.log;
  rewrite_log          on;
  index                index.html;

  location / {
    proxy_set_header Host $host;
    proxy_set_header X-Forwarded-Host $host;
    proxy_set_header X-Real-IP $remote_addr;
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    proxy_buffering  on;
    proxy_redirect   off;
    proxy_pass       http://guorj_rails_unicorn_server;
  }
  #Rails error pages
  location =/500.html {
    root /home/NginxUser/www/guorj/public;
  }
}

/home/NginxUser/www/guorj/config/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.
# can't specify rails env
rails_env = ENV["RAILS_ENV"] || "production"

# Use at least one worker per core if you're on a dedicated server,
# more will usually help for _short_ waits on databases/caches.
worker_processes 4

# 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):
# user "unprivileged_user", "unprivileged_group"

# Help ensure your application will always spawn in the symlinked
# "current" directory that Capistrano sets up.

app_root = File.expand_path('.')

working_directory app_root #"/path/to/app/current" # 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 "/path/to/.unicorn.sock", :backlog => 64
#listen "#{app_root}/tmp/sockets/unicorn.sock", :backlog => 64
listen "/tmp/guorj_unicorn.sock", :backlog => 64
listen 8081, :tcp_nopush => false # true

# nuke workers after 30 seconds instead of 60 seconds (the default)
timeout 120 # 30

# feel free to point this anywhere accessible on the filesystem
#pid "/path/to/app/shared/pids/unicorn.pid"
#pid "#{app_root}/tmp/pids/unicorn.pid"
pid "/tmp/guorj_unicorn.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 "/path/to/app/shared/log/unicorn.stderr.log"
#stdout_path "/path/to/app/shared/log/unicorn.stdout.log"
stderr_path "#{app_root}/log/unicorn.stderr.log"
stdout_path "#{app_root}/log/unicorn.stdout.log"

# combine Ruby 2.0.0dev or REE with "preload_app true" for memory savings
# http://rubyenterpriseedition.com/faq.html#adapt_apps_for_cow
preload_app true
GC.respond_to?(:copy_on_write_friendly=) and
  GC.copy_on_write_friendly = 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

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!

  # 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

然后运行unicorn

unicorn_rails -c /home/NginxUser/www/guorj/config/unicorn.rb -E production -D 

添加第二个rails项目（请自行和第一个项目的配置对比不同，被网速把激情磨灭了）

/usr/local/nginx/conf/conf.d/wguorj.conf 

upstream wguorj_rails_unicorn_server {
  server unix:/tmp/wguorj_unicorn.sock fail_timeout=0;
  #server 127.0.0.1:8082 fail_timeout=0;
}
server {
  listen 80;
  client_max_body_size 4G;
  server_name          www.guorj.com;
  keepalive_timeout    5;
  root                 /home/NginxUser/www/wguorj/public;
  access_log           /home/NginxUser/www/wguorj/log/nginx_access.log;
  error_log            /home/NginxUser/www/wguorj/log/nginx_error.log;
  rewrite_log          on;
  index                index.html;

  location / {
    proxy_set_header Host $host;
    proxy_set_header X-Forwarded-Host $host;
    proxy_set_header X-Real-IP $remote_addr;
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    proxy_buffering  on;
    proxy_redirect   off;
    proxy_pass       http://wguorj_rails_unicorn_server;
  }
  #Rails error pages
  location =/500.html {
    root /home/NginxUser/www/wguorj/public;
  }
}

/home/NginxUser/www/wguorj/config/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.
# can't specify rails env
rails_env = ENV["RAILS_ENV"] || "production"

# Use at least one worker per core if you're on a dedicated server,
# more will usually help for _short_ waits on databases/caches.
worker_processes 4

# 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):
# user "unprivileged_user", "unprivileged_group"

# Help ensure your application will always spawn in the symlinked
# "current" directory that Capistrano sets up.

app_root = File.expand_path('.')

working_directory app_root #"/path/to/app/current" # 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 "/path/to/.unicorn.sock", :backlog => 64
#listen "#{app_root}/tmp/sockets/unicorn.sock", :backlog => 64
listen "/tmp/wguorj_unicorn.sock", :backlog => 64
listen 8082, :tcp_nopush => false # true

# nuke workers after 30 seconds instead of 60 seconds (the default)
timeout 120 # 30

# feel free to point this anywhere accessible on the filesystem
#pid "/path/to/app/shared/pids/unicorn.pid"
#pid "#{app_root}/tmp/pids/unicorn.pid"
pid "/tmp/wguorj_unicorn.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 "/path/to/app/shared/log/unicorn.stderr.log"
#stdout_path "/path/to/app/shared/log/unicorn.stdout.log"
stderr_path "#{app_root}/log/unicorn.stderr.log"
stdout_path "#{app_root}/log/unicorn.stdout.log"

# combine Ruby 2.0.0dev or REE with "preload_app true" for memory savings
# http://rubyenterpriseedition.com/faq.html#adapt_apps_for_cow
preload_app true
GC.respond_to?(:copy_on_write_friendly=) and
  GC.copy_on_write_friendly = 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

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!

  # 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

运行第二个rails程序 记得重启nginx

unicorn_rails -c /home/NginxUser/www/wguorj/config/unicorn.rb -E production -D

相关参考资料

求 Nginx + Unicorn 部署 Rails 完整配置 http://ruby-china.org/topics/471

https://github.com/huacnlee/ruby-china/blob/master/config/unicorn.rb

https://raw.github.com/defunkt/unicorn/master/examples/unicorn.conf.rb

unicorn官网：http://unicorn.bogomips.org/

注运行两个rails项目的进程

[root@GrjServer guorj]# ps aux | grep nginx
root      1180  0.0  0.2  45108  1256 ?        Ss   17:34   0:00 nginx: master process /usr/local/nginx/sbin/nginx
500       1181  0.0  0.3  45536  1820 ?        S    17:34   0:00 nginx: worker process      
root      1184  0.0  0.1 103244   856 pts/0    S+   17:34   0:00 grep nginx
[root@GrjServer guorj]# ps aux | grep unicorn
root      1116  0.0 12.5 272756 62856 ?        Sl   17:00   0:01 unicorn_rails master -c /home/NginxUser/www/guorj/config/unicorn.rb -E production -D                                                                                          
root      1119  0.0 12.3 272756 61680 ?        Sl   17:00   0:00 unicorn_rails worker[0] -c /home/NginxUser/www/guorj/config/unicorn.rb -E production -D                                                                                       
root      1122  0.0 12.3 272756 61680 ?        Sl   17:00   0:00 unicorn_rails worker[1] -c /home/NginxUser/www/guorj/config/unicorn.rb -E production -D                                                                                       
root      1125  0.0 12.3 272756 61680 ?        Sl   17:00   0:00 unicorn_rails worker[2] -c /home/NginxUser/www/guorj/config/unicorn.rb -E production -D                                                                                       
root      1128  0.0 12.3 272756 61680 ?        Sl   17:00   0:00 unicorn_rails worker[3] -c /home/NginxUser/www/guorj/config/unicorn.rb -E production -D                                                                                       
root      1159  1.2 12.5 272912 63008 ?        Sl   17:33   0:01 unicorn_rails master -c /home/NginxUser/www/wguorj/config/unicorn.rb -E production -D                                                                                          
root      1162  0.0 12.3 272912 61820 ?        Sl   17:33   0:00 unicorn_rails worker[0] -c /home/NginxUser/www/wguorj/config/unicorn.rb -E production -D                                                                                       
root      1165  0.0 12.3 272912 61820 ?        Sl   17:33   0:00 unicorn_rails worker[1] -c /home/NginxUser/www/wguorj/config/unicorn.rb -E production -D                                                                                       
root      1168  0.0 12.3 272912 61820 ?        Sl   17:33   0:00 unicorn_rails worker[2] -c /home/NginxUser/www/wguorj/config/unicorn.rb -E production -D                                                                                       
root      1171  0.0 12.3 272912 61820 ?        Sl   17:33   0:00 unicorn_rails worker[3] -c /home/NginxUser/www/wguorj/config/unicorn.rb -E production -D                                                                                       
root      1186  0.0  0.1 103244   856 pts/0    S+   17:34   0:00 grep unicorn
[root@GrjServer guorj]#