使用Nginx + unicorn搭建ruby on rails的生产环境
有三台机器,操作系统都是CentOS 6.3 64位:其中172.16.9.100,安装Nginx服务器;另外的两台172.16.9.101和172.16.9.102安装unicorn,作为RoR的应用服务器。在这里先保证ruby及rails已经在101和102两台机器上配置好,这是前提。如何安装Nginx及RoR的环境就不在这里说了,很多文章都介绍得很详细。
这里假设项目在/var/www/demo_project文件夹中
在101上使用
gem install unicorn 命令安装unicorn。
新建内容为以下的一个文件,需要进行修改的地方请看文件中的中文注释,文件放置到/var/www/demo_project_unicorn.rb,这个文件是对这个项目的生产环境配置
# 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. 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. working_directory "/var/www/demo_project" # available in 0.94.0+ 在这里修改为项目所在目录 # listen on both a Unix domain socket and a TCP port, # we use a shorter backlog for quicker failover when busy listen "/var/tmp/.unicorn.sock", :backlog => 64 listen 19527, :tcp_nopush => true #端口号,NginX需要用到此端口号 # nuke workers after 30 seconds instead of 60 seconds (the default) timeout 120 # feel free to point this anywhere accessible on the filesystem pid "/usr/tmp/demo_project/pids/unicorn.pid" #pid文件的位置,可以自己设置,注意权限 # 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 "/usr/tmp/demo_project/log/unicorn.stderr.log" #错误日志的位置,自己设置,注意权限 stdout_path "/usr/tmp/demo_project/log/unicorn.stdout.log" #输出日志的位置,自己设置,注意权限 # 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
然后创建一个shell文件,内容如下,这个文件命名为/var/www/unicorn.sh
UNICORN=/usr/local/ruby/bin/unicorn_rails killall -9 unicorn_rails $UNICORN -c /var/www/demo_project_unicorn.rb -D -E production
其中第一行,指明unicorn的安装位置,unicorn安装成功后,是和ruby,rails等可执行文件是在同一个文件夹中的。第二行,关闭unicorn_rails的进程。第三行,根据-c参数后的配置,在生产环境中启动项目。执行这个文件就能启动unicorn服务器。
另外的一台主机102的配置,也与101相同。unicorn的配置也就完成了。下面开始NginX的配置
在/usr/local/nginx/conf/nginx.conf中添加如下的配置信息,具体意思见中文注释
upstream demo_project_backend { #连接两台RoR unicorn服务器 server 172.16.9.101:19527; server 172.16.9.102:19527; } server { listen 80 default_server; server_name _; return 403; } server { listen 80; server_name www.demo_project.com demo_project.com; #access_log logs/host.access.log main; proxy_connect_timeout 500s; proxy_read_timeout 500s; proxy_send_timeout 500s; #将对的请求,转到两台主机上 location / { root html; index index.html index.htm; proxy_pass http://demo_project_backend; } # redirect server error pages to the static page /50x.html # error_page 500 502 503 504 /50x.html; location = /50x.html { root html; } }来自:http://my.oschina.net/mogralee/blog/299890
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