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Ubuntu Server + nginx + unicorn tcp socket 方式如何设置运行多个 app at 2013年05月11日
非常感谢 @jasl 的指导已搞定，确实是写瞎了，没有预编译 css 等

思路过程：

我已经邦在不同的二级域名上 app1.domain.com app2.domain.com kill 掉 unicorn_rails，分别单独分别独立运行访问，两个都是正常的，所以程序没有写瞎。应该是 unicorn.rb 或者 nginx.conf 哪里写错了

nginx 那边每次都是正常的，没有错误提醒
```
/usr/local/webserver/nginx/sbin/nginx -t
nginx: the configuration file /usr/local/webserver/nginx/conf/nginx.conf syntax is ok
nginx: configuration file /usr/local/webserver/nginx/conf/nginx.conf test is successful
```
然后
```
kill -HUP `cat /usr/local/webserver/nginx/logs/nginx.pid`
```
app 的 unicorn 的错误日志是说当用 unix domain socket 错误提醒是 (两个 app 都运行不起来)
```
/usr/local/rvm/gems/ruby-1.9.3-p374/gems/unicorn-4.6.2/lib/unicorn/socket_helper.rb:134:in `bind_listen': socket=/tmp/ruby-china.sock specified but it is not a socket! (ArgumentError)
```
改用 tcp socket 的时候，能运行一个 app，谁先运行 unicorn 的谁就先能用，第二个运行似乎也正常了没出现提醒，但是

等等，我重新对应一下
```
app1
uicorn.rb
listen 5001
listen 127.0.0.1:3000
```
app1.conf 那边
```
listen 127.0.0.1:3000
```
app2
```
uniorn.rb
listen 5002
listen 127.0.0.1:3002
```
```
app2.conf那边
listen 127.0.0.1:3002
```
-t conf 正常，kill 重启 nginx app1 正常 app2 sth wrong

查看 production.log 发现不好意思，果然是写瞎了！ 开发环境和生产环境的切换没注意到，看 production.log 发现是没有预编译
```
bundle exec rake assets:precompile
/usr/local/rvm/rubies/ruby-1.9.3-p374/bin/ruby /usr/local/rvm/gems/ruby-1.9.3-p374/bin/rake assets:precompile:all RAILS_ENV=production RAILS_GROUPS=assets
```
ps:没搞懂为咋当初单独的时候可以，可能是我中间过程端口改来改去的，导致端口对应错了

非常感谢 @jasl 的指导，问题已解决
Ubuntu Server + nginx + unicorn 遇到问题 at 2013年04月20日

看完第七季的嗜血法医，回来浏览器一打开，改了几下问题处理好了。感谢@yangkit ，这么详细、细致的帮忙解决了困恼我几天的问题留个支付宝咋的，我转点 4 杯喝咖啡的感谢

Ubuntu Server + nginx + unicorn 遇到问题 at 2013年04月19日

@yangkit 其他动态文件，出现内部 500 错误

rails@ubuntu:~/hellworld$ rake routes
    homes GET    /homes(.:format)          homes#index
          POST   /homes(.:format)          homes#create
 new_home GET    /homes/new(.:format)      homes#new
edit_home GET    /homes/:id/edit(.:format) homes#edit
     home GET    /homes/:id(.:format)      homes#show
          PUT    /homes/:id(.:format)      homes#update
          DELETE /homes/:id(.:format)      homes#destroy
rails@ubuntu:~/hellworld$ curl -I ruby1.com:5000/homes
HTTP/1.1 500 Internal Server Error
Date: Fri, 19 Apr 2013 14:48:21 GMT
Status: 500 Internal Server Error
Connection: close
Content-Type: text/html; charset=utf-8
Content-Length: 643
X-Request-Id: 4c91649b0d41f3cb005ab015b93b467a
X-Runtime: 0.088350
X-Rack-Cache: miss

rails@ubuntu:~/hellworld$ curl -I ruby1.com:5000/homes/new
HTTP/1.1 500 Internal Server Error
Date: Fri, 19 Apr 2013 14:48:47 GMT
Status: 500 Internal Server Error
Connection: close
Content-Type: text/html; charset=utf-8
Content-Length: 643
X-Request-Id: 9b925ac79e2892dd36dd1eca4ffe395c
X-Runtime: 0.009192
X-Rack-Cache: miss

Ubuntu Server + nginx + unicorn 遇到问题 at 2013年04月19日

@yangkit 真实存在

/home/rails/hellworld/public
ls -l
total 24
-rwxrwxr-x 1 rails rails  728 Apr 18 15:01 404.html
-rwxrwxr-x 1 rails rails  711 Apr 18 15:01 422.html
-rwxrwxr-x 1 rails rails  643 Apr 18 15:01 500.html
-rwxrwxr-x 1 rails rails    0 Apr 18 15:01 favicon.ico
-rwxrwxr-x 1 rails rails 5906 Apr 18 15:01 index.html
-rwxrwxr-x 1 rails rails  204 Apr 18 15:01 robots.txt

Ubuntu Server + nginx + unicorn 遇到问题 at 2013年04月19日

我用 rails s 再测试一下，3000 端口可以 curl -I ruby1.com:3000/robots.txt

HTTP/1.1 200 OK 
Last-Modified: Thu, 18 Apr 2013 22:01:23 GMT
Content-Type: text/plain
Content-Length: 204
Server: WEBrick/1.3.1 (Ruby/1.9.3/2013-02-22)
Date: Fri, 19 Apr 2013 14:36:07 GMT
Connection: Keep-Alive

Ubuntu Server + nginx + unicorn 遇到问题 at 2013年04月19日

其他 get 路径

curl -I ruby1.com:5000/homes
HTTP/1.1 500 Internal Server Error
Date: Fri, 19 Apr 2013 14:35:26 GMT
Status: 500 Internal Server Error
Connection: close
Content-Type: text/html; charset=utf-8
Content-Length: 643
X-Request-Id: e865931fc4ff24348215b7541164b1ea
X-Runtime: 0.112063
X-Rack-Cache: miss
```ruby

Ubuntu Server + nginx + unicorn 遇到问题 at 2013年04月19日

#21 楼 @yangkit

rails@ubuntu:~/hellworld$ curl -I ruby1.com:5000/robots.txt
HTTP/1.1 404 Not Found
Date: Fri, 19 Apr 2013 14:31:40 GMT
Status: 404 Not Found
Connection: close
Content-Type: text/html; charset=utf-8
Content-Length: 728
X-Request-Id: f2fb1fad29aec7fd859f2956100b7f8d
X-Runtime: 0.016250
X-Rack-Cache: miss

还是 404 指向不正确？

我记得 nginx.conf 里头 server root /home/rails/hellworld/public;

Ubuntu Server + nginx + unicorn 遇到问题 at 2013年04月19日

#15 楼 @yangkit 第一次看到结果了不过是 404

curl -I www.ruby1.com:5000

curl -I www.ruby1.com:5000
HTTP/1.1 404 Not Found
Date: Fri, 19 Apr 2013 14:23:39 GMT
Status: 404 Not Found
Connection: close
Content-Type: text/html; charset=utf-8
Content-Length: 728
X-Request-Id: 8f3e2a14c4c34e3f96b6bd47a917443c
X-Runtime: 0.030946
X-Rack-Cache: miss

网页打开 80 端口还是 502 Bad Gateway

Ubuntu Server + nginx + unicorn 遇到问题 at 2013年04月19日

#16 楼 @yangkit 14 楼已重新编辑了

Ubuntu Server + nginx + unicorn 遇到问题 at 2013年04月19日

#15 楼 @yangkit ’ps aux|grep unicorn_rails`

rails     1307 18.4  1.5 137284 46348 ?        Sl   07:18   0:02 unicorn_rails master -c config/unicorn.rb -E production -D                                                                                                      
rails     1311  0.4  1.4 137284 43768 ?        Sl   07:18   0:00 unicorn_rails worker[0] -c config/unicorn.rb -E production -D                                                                                                   
rails     1313  0.4  1.4 137284 43512 ?        Sl   07:18   0:00 unicorn_rails worker[1] -c config/unicorn.rb -E production -D                                                                                                   
rails     1316  0.4  1.4 137284 43528 ?        Sl   07:18   0:00 unicorn_rails worker[2] -c config/unicorn.rb -E production -D                                                                                                   
rails     1319  0.3  1.4 137284 43548 ?        Sl   07:18   0:00 unicorn_rails worker[3] -c config/unicorn.rb -E production -D                                                                                                   
rails     1322  0.3  1.4 137284 43568 ?        Sl   07:18   0:00 unicorn_rails worker[4] -c config/unicorn.rb -E production -D                                                                                                   
rails     1326  0.3  1.4 137284 43588 ?        Sl   07:18   0:00 unicorn_rails worker[5] -c config/unicorn.rb -E production -D

kill -USR2 1307 等等，把所有 pid 都 kill 掉，然后重新

 RAILS_ENV=production bundle exec unicorn_rails -c config/unicorn.rb -E production -D
/home/rails/hellworld
master failed to start, check stderr log for details

还是有pid。。。
cat log/unicorn.log 查看错误信息
/home/rails/.rvm/gems/ruby-1.9.3-p392/gems/unicorn-4.6.2/lib/unicorn/http_server.rb:193:in `pid=': Already running on PID:1341 (or pid=/home/rails/hellworld/tmp/pids/unicorn.pid is stale) (ArgumentError)

Ubuntu Server + nginx + unicorn 遇到问题 at 2013年04月19日

sudo vim /etc/init.d/unicorn.hellwold

#!/bin/sh
set -e

# Feel free to change any of the following variables for your app:
TIMEOUT=${TIMEOUT-60}
APP_ROOT=/home/rails/hellworld
APP_USER=username
PID=$APP_ROOT/tmp/pids/unicorn.pid
ENV=production
CMD="bundle exec unicorn_rails -E $ENV -D -c $APP_ROOT/config/unicorn.rb"
action="$1"
set -u

old_pid="$PID.oldbin"
cd $APP_ROOT || exit 1

sig (){
        test -s "$PID" && kill -$1 `cat $PID`
}

oldsig (){
        test -s $old_pid && kill -$1 `cat $old_pid`
}
case $action in
start)
        sig 0 && echo >&2 "Already running" && exit 0
        su $APP_USER -c "$CMD"
        ;;
stop)
        sig QUIT && exit 0
        echo >&2 "Not running"
        ;;
force-stop)
        sig TERM && exit 0

        echo >&2 "Not running"
        ;;
restart|reload)
        sig HUP && echo reloaded OK && exit 0
        echo >&2 "Couldn't reload, starting '$CMD' instead"
        su $APP_USER -c "$CMD"
        ;;
upgrade)
        if sig USR2 && sleep2 && sig 0 && oldsig QUIT
        then
                n=$TIMEOUT
                while test -s $old_pid && test $n -ge 0
                do
                        printf '.' && sleep 1 && n=$(($n - 1))
                done
                echo

                if test $n -lt 0 && test -s $old_pid
                then
                        echo >&2 "$old_pid still exists after $TIMEOUT seconds"
                        exit1
                fi
                exit0
        fi
        echo >&2 "Couldn't upgrade, starting '$CMD' instead"
        su $APP_USER -c "$CMD"
        ;;
reopen-logs)
        sig USR1
        ;;*)
        echo >&2 "Usage: $0 <start|stop|restart|upgrade|force-stop|reopen-logs>"
        exit 1
        ;;
esac

rails@ubuntu:/etc/init.d$ sudo chmod +x unicorn.hellwold 
rails@ubuntu:/etc/init.d$ sudo /etc/init.d/unicorn.hellworld start
sudo: /etc/init.d/unicorn.hellworld: command not found

@yangkit 是这样添加吗

Ubuntu Server + nginx + unicorn 遇到问题 at 2013年04月19日

bundle install 装了，在之前部署的时候就 gem install unicorn 现在又在 helloworld 根下执行了几次 bundle install

RAILS_ENV=production bundle exec unicorn_rails -c config/unicorn.rb -E production -D

运行一下，停顿一下，然后就下一个$

rails@ubuntu:~/hellworld$ cat log/unicorn.log 
I, [2013-04-19T06:54:24.883859 #1226]  INFO -- : Refreshing Gem list
I, [2013-04-19T06:54:28.800850 #1226]  INFO -- : listening on addr=0.0.0.0:5000 fd=11
I, [2013-04-19T06:54:28.801181 #1226]  INFO -- : listening on addr=/tmp/unicorn.ruby-china.sock fd=12
I, [2013-04-19T06:54:28.803877 #1229]  INFO -- : worker=0 spawned pid=1229
I, [2013-04-19T06:54:28.812031 #1232]  INFO -- : worker=1 spawned pid=1232
I, [2013-04-19T06:54:28.818480 #1237]  INFO -- : worker=3 spawned pid=1237
I, [2013-04-19T06:54:28.818915 #1234]  INFO -- : worker=2 spawned pid=1234
I, [2013-04-19T06:54:28.840173 #1241]  INFO -- : worker=4 spawned pid=1241
I, [2013-04-19T06:54:28.841920 #1226]  INFO -- : master process ready
I, [2013-04-19T06:54:28.863606 #1244]  INFO -- : worker=5 spawned pid=1244
I, [2013-04-19T06:54:28.999588 #1229]  INFO -- : worker=0 ready
I, [2013-04-19T06:54:29.029094 #1237]  INFO -- : worker=3 ready
I, [2013-04-19T06:54:29.038157 #1241]  INFO -- : worker=4 ready
I, [2013-04-19T06:54:29.046324 #1232]  INFO -- : worker=1 ready
I, [2013-04-19T06:54:29.054201 #1234]  INFO -- : worker=2 ready
I, [2013-04-19T06:54:29.061516 #1244]  INFO -- : worker=5 ready
/home/rails/.rvm/gems/ruby-1.9.3-p392/gems/unicorn-4.6.2/lib/unicorn/http_server.rb:193:in `pid=': Already running on PID:1226 (or pid=/home/rails/hellworld/tmp/pids/unicorn.pid is stale) (ArgumentError)
        from /home/rails/.rvm/gems/ruby-1.9.3-p392/gems/unicorn-4.6.2/lib/unicorn/http_server.rb:137:in `start'
        from /home/rails/.rvm/gems/ruby-1.9.3-p392/gems/unicorn-4.6.2/bin/unicorn_rails:209:in `<top (required)>'
        from /home/rails/.rvm/gems/ruby-1.9.3-p392/bin/unicorn_rails:19:in `load'
        from /home/rails/.rvm/gems/ruby-1.9.3-p392/bin/unicorn_rails:19:in `<main>'
        from /home/rails/.rvm/gems/ruby-1.9.3-p392/bin/ruby_noexec_wrapper:14:in `eval'
        from /home/rails/.rvm/gems/ruby-1.9.3-p392/bin/ruby_noexec_wrapper:14:in `<main>'
/home/rails/.rvm/gems/ruby-1.9.3-p392/gems/unicorn-4.6.2/lib/unicorn/http_server.rb:193:in `pid=': Already running on PID:1226 (or pid=/home/rails/hellworld/tmp/pids/unicorn.pid is stale) (ArgumentError)
        from /home/rails/.rvm/gems/ruby-1.9.3-p392/gems/unicorn-4.6.2/lib/unicorn/http_server.rb:137:in `start'
        from /home/rails/.rvm/gems/ruby-1.9.3-p392/gems/unicorn-4.6.2/bin/unicorn_rails:209:in `<top (required)>'
        from /home/rails/.rvm/gems/ruby-1.9.3-p392/bin/unicorn_rails:19:in `load'
        from /home/rails/.rvm/gems/ruby-1.9.3-p392/bin/unicorn_rails:19:in `<main>'
        from /home/rails/.rvm/gems/ruby-1.9.3-p392/bin/ruby_noexec_wrapper:14:in `eval'
        from /home/rails/.rvm/gems/ruby-1.9.3-p392/bin/ruby_noexec_wrapper:14:in `<main>'

反复 sudo reboot，然后执行 RAILS_ENV=production bundle exec unicorn_rails -c config/unicorn.rb -E production -D 网页还是 502

Ubuntu Server + nginx + unicorn 遇到问题 at 2013年04月19日

#9 楼 @blacktulip sudo service unicorn status unicorn: unrecognized service "unicorn: unrecognized service" google 没找到有答案 stackoverflow 也没找到，555
Ubuntu Server + nginx + unicorn 遇到问题 at 2013年04月19日

sudo service unicorn status unicorn: unrecognized service 确实没启动

但是 unicorn -v 有结果，说明有安装 cat log/unicorn.log 没输出结果

vim Gemfile gem 'unicorn' 有，有去注解

vim /home/rails/hellworld/config/unicorn.rb 看顶楼

nginx.conf

upstream unicorn_server { server unix:/tmp/unicorn.ruby-china.sock fail_timeout=0; }

proxy_pass http://unicorn_server;
Ubuntu Server + nginx + unicorn 遇到问题 at 2013年04月19日

curl -I ruby1.com:5000 curl: (7) couldn't connect to host

curl baidu.com

curl 127.0.0.1:5000 curl: (7) couldn't connect to host

curl 127.0.0.1
502 Bad Gateway
502 Bad Gateway

nginx/1.1.19
================================== ps aux|grep unicorn_rails rails 1096 0.0 0.0 9384 872 pts/1 S+ 06:41 0:00 grep unicorn_rails

================================== cat unicorn.log 是空的 T_T
Ubuntu Server + nginx + unicorn 遇到问题 at 2013年04月19日

nginx 那边设置监听是 80 端口，所以 www.ruby1.com:5000 tail -f /var/log/nginx/error.log 这里没有任何新的输出信息
Ubuntu Server + nginx + unicorn 遇到问题 at 2013年04月19日

#1 楼 @yangkit 不正常是不是 unicorn 没启动起来

unicorn -v unicorn v4.6.2