Nginx+Unicorn+rails多项目

编程技术  /  houtizong 发布于 3年前   63

使用nginx搭配unicorn来启动多个工程，同时还要照顾过去那些使用lighttpd启动的项目

一、nginx的安装配置

 tar zxvf nginx-0.7.67.tar.gz cd nginx-0.7.67/ ./configure make make install

默认在/usr/local/nginx/sbin下
执行命令

cd /usr/local/nginx/sbin ./nginx

如是想更换端口 编辑配置文件/usr/local/nginx/conf/nginx.conf 中的配置即可

下面要配置一个工程，通过nginx和unicorn来启动

  创建这个目录待用/tmp/nginx/sockets/
  在nginx配置文件中添加一个

  upstream config_manager {    server unix:/tmp/nginx/sockets/config_manager_unicorn.sock fail_timeout=0;  }

  server中添加

server {        listen       80;        server_name  ***.******.com;        ………        ……        location ~ ^/config {                 (注：这是一个正则表达式 匹配浏览器地址访地址 的path,这里以config开头的path在这里面处理，也可以直接写成 location /config)            proxy_pass_header Server;            proxy_set_header Host $http_host;            proxy_redirect off;            proxy_set_header X-Real-IP $remote_addr;            proxy_set_header X-Scheme $scheme;            proxy_pass http://config_manager;（注：这个config_manager 对应上面的upstream）        }

二、安装unicorn并在项目中添加对应的配置
安装很简单，直接

gem install unicorn

  在工程里面 配置路径下添加(这个是github的配置文件，有很多没用的都贴出来了)
  unicorn.rb
  内容如下：

# unicorn_rails -c /data/github/current/config/unicorn.rb -E production -Drails_env = ENV['RAILS_ENV'] || 'production'# 16 workers and 1 masterworker_processes (rails_env == 'production' ? 16 : 4)# Load rails+github.git into the master before forking workers# for super-fast worker spawn timespreload_app true# Restart any workers that haven't responded in 30 secondstimeout 30# Listen on a Unix data socket!!!!!!!!!!!!!!!!!!!!!!!=========下面这个地址要与nginx.conf的upstream相对应listen '/tmp/nginx/sockets/config_manager_unicorn.sock', :backlog => 2048### REE# http://www.rubyenterpriseedition.com/faq.html#adapt_apps_for_cowif GC.respond_to?(:copy_on_write_friendly=)  GC.copy_on_write_friendly = trueendbefore_fork do |server, worker|  ##  # When sent a USR2, Unicorn will suffix its pidfile with .oldbin and  # immediately start loading up a new version of itself (loaded with a new  # version of our app). When this new Unicorn is completely loaded  # it will begin spawning workers. The first worker spawned will check to  # see if an .oldbin pidfile exists. If so, this means we've just booted up  # a new Unicorn and need to tell the old one that it can now die. To do so  # we send it a QUIT.  #  # Using this method we get 0 downtime deploys.  old_pid = RAILS_ROOT + '/tmp/pids/unicorn.pid.oldbin'  if File.exists?(old_pid) && server.pid != old_pid    begin      Process.kill("QUIT", File.read(old_pid).to_i)    rescue Errno::ENOENT, Errno::ESRCH      # someone else did our job for us    end  endendafter_fork do |server, worker|  ##  # Unicorn master loads the app then forks off workers - because of the way  # Unix forking works, we need to make sure we aren't using any of the parent's  # sockets, e.g. db connection!!!!!!!!!!!!!!!!!!!=====注释掉了第二行，主要是因为没有开启相应的memcache服务之类======!!!!!!!!!!!!!!!  ActiveRecord::Base.establish_connection  #CHIMNEY.client.connect_to_server    # Redis and Memcached would go here but their connections are established  # on demand, so the master never opens a socket  ##  # Unicorn master is started as root, which is fine, but let's  # drop the workers to git:git  begin    uid, gid = Process.euid, Process.egid    user, group = 'root', 'root'    target_uid = Etc.getpwnam(user).uid    target_gid = Etc.getgrnam(group).gid    worker.tmp.chown(target_uid, target_gid)    if uid != target_uid || gid != target_gid      Process.initgroups(user, target_gid)      Process::GID.change_privilege(target_gid)      Process::UID.change_privilege(target_uid)    end  rescue => e    if RAILS_ENV == 'development'      STDERR.puts "couldn't change user, oh well"    else      raise e    end  endend

配置完成后 访问http://***.***.com/config，会出现config路由不存在，可在工程项目中的config/environment.rb中添加这么一句

ENV['RAILS_RELATIVE_URL_ROOT'] = "/config"

再放个简约的配置

worker_processes 3listen '/tmp/nginx/sockets/*****.sock', :backlog => 2048timeout 30preload_app truebefore_fork do |server, worker|  old_pid = pid_file + '.oldbin'  if File.exists?(old_pid) && server.pid != old_pid    begin      Process.kill("QUIT", File.read(old_pid).to_i)    rescue Errno::ENOENT, Errno::ESRCH      # someone else did our job for us    end  endend

配置完成之后，打开工程目录后，运行：unicorn_rails -c config/unicorn.rb -E production


三、nginx反向代理lighttpd
现在要改用 nginx 做 web server,但是有一些老项目用的 lighttpd。
可以用 nginx 反向代理功能，把一些请求叫给 lighttpd 处理

1 修改 lighttpd 的配置文件

# /etc/lighttpd/lighttpd.conf

# 只允许本机访问  server.bind = "localhost"    # 从81端口启动  server.port                = 81  

2 修改 nginx 的配置文件
# /usr/local/nginx/conf/nginx.conf

http {    # 新的项目 对应 new.domain.com 域名    server {      listen          80;      server_name     new.domain.com;      access_log      logs/domain1.access.log main;         index index.html;      root  /var/www/domain1.com/htdocs;    }          # 旧的项目 对应 old.domain.com 域名     server {        listen 80;        server_name   old.domain.com;        location / {                   proxy_pass_header Server;                 proxy_set_header Host $http_host;                 proxy_redirect off;                 proxy_set_header X-Real-IP $remote_addr;                 proxy_set_header X-Scheme $scheme;        # 转发给 81 端口的 lighttpd 处理          proxy_pass      http://127.0.0.1:81;        }      }  }