ruby-on-rails - nginx 和 unicorn bad gatewayconnect() to unix :/tmp/mobile. socket failed AND failed (111: Connection refused)

Question

我正在(尝试)在 rackspace 上设置一个 ubuntu 11.04 服务器，以运行带有 nginx 和 unicorn 的 Rails 3.2 应用程序。我找到了这个很棒的博客 http://techbot.me/2010/08/deployment-recipes-deploying-monitoring-and-securing-your-rails-application-to-a-clean-ubuntu-10-04-install-using-nginx-and-unicorn/这对我有很大帮助，除了 mysql 设置问题外，我认为除了严重的网关错误外，我已经解决了所有问题

nginx错误日志显示

2012/02/25 14:38:34 [crit] 29139#0: *1 connect() to unix:/tmp/mobile.socket failed (2: No such file or directory) while connecting to upstream, client: xx.xx.xxx.xx, server: localhost, request: "GET / HTTP/1.1", upstream: "http://unix:/tmp/mobile.socket:/", host: xx.xx.xxx.xx

(我已经排除了域)

我想这可能是用户权限问题，但该文件实际上并不存在，我不确定应该如何创建它。我不愿意手动创建它，因为我觉得这样做只能治标不治本

另外需要注意的是，我在服务器上创建的用户有sudo权限，需要用sudo启动nginx，不知道这样对不对？非常感谢任何关于我应该寻找什么来解决这个问题的指示。为了完整起见，我的配置文件看起来像这样/etc/init.dunicorn

#! /bin/sh
### BEGIN INIT INFO
# Provides: unicorn
# Required-Start: $local_fs $remote_fs $network $syslog
# Required-Stop: $local_fs $remote_fs $network $syslog
# Default-Start: 2 3 4 5
# Default-Stop: 0 1 6
# Short-Description: starts the unicorn web server
# Description: starts unicorn
### END INIT INFO

PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin
DAEMON=/usr/bin/unicorn_rails
DAEMON_OPTS="-c /home/testapp/mobile/current/unicorn.rb -E production -D"
NAME=unicorn_rails
DESC=unicorn_rails
PID=/home/testapp/mobile/shared/pids/unicorn.pid

case "$1" in
  start)
echo -n "Starting $DESC: "
$DAEMON $DAEMON_OPTS
echo "$NAME."
;;
  stop)
echo -n "Stopping $DESC: "
        kill -QUIT `cat $PID`
echo "$NAME."
;;
  restart)
echo -n "Restarting $DESC: "
        kill -QUIT `cat $PID`
sleep 1
$DAEMON $DAEMON_OPTS
echo "$NAME."
;;

和/etc/nginx/sites-available/default 中的 nginx 配置

# as we are going to use Unicorn as the application server
# we are not going to use common sockets
# but Unix sockets for faster communication
upstream mobile {
  # fail_timeout=0 means we always retry an upstream even if it failed
  # to return a good HTTP response (in case the Unicorn master nukes a
  # single worker for timing out).

  # for UNIX domain socket setups:
  server unix:/tmp/mobile.socket fail_timeout=0;
}

server {
    # if you're running multiple servers, instead of "default" you should
    # put your main domain name here
    listen 80 default;
# you could put a list of other domain names this application answers
server_name localhost;

root /home/testapp/mobile/current/public;
access_log /var/log/nginx/mobile_access.log;
rewrite_log on;

location / {
    #all requests are sent to the UNIX socket
    proxy_pass http://mobile;
    proxy_redirect off;

    proxy_set_header Host $host:$proxy_port;
    proxy_set_header X-Real-IP $remote_addr;
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;

    client_max_body_size 10m;
    client_body_buffer_size 128k;

    proxy_connect_timeout 90;
    proxy_send_timeout 90;
    proxy_read_timeout 90;

    proxy_buffer_size 4k;
    proxy_buffers 4 32k;
    proxy_busy_buffers_size 64k;
    proxy_temp_file_write_size 64k;
}

# if the request is for a static resource, nginx should serve it directly
# and add a far future expires header to it, making the browser
# cache the resource and navigate faster over the website
location ~ ^/(images|javascripts|stylesheets|system)/ {
  root /home/testapp/mobile/current/public;
  expires max;
  break;
}

}

更新我的 unicorn.rb 文件

# See http://unicorn.bogomips.org/Unicorn/Configurator.html for complete
# documentation.
worker_processes 4
# Help ensure your application will always spawn in the symlinked
# "current" directory that Capistrano sets up.
working_directory "/home/testapp/mobile/current"
# listen on both a Unix domain socket and a TCP port,
# we use a shorter backlog for quicker failover when busy
listen "/tmp/mobile.socket", :backlog => 64
# nuke workers after 30 seconds instead of 60 seconds (the default)
timeout 30
# feel free to point this anywhere accessible on the filesystem
user 'testapp', 'testapp'
shared_path = '/home/testapp/mobile/shared'
pid "#{shared_path}/pids/unicorn.pid"
stderr_path "#{shared_path}/log/unicorn.stderr.log"
stdout_path "#{shared_path}/log/unicorn.stdout.log"

根据建议，我手动创建了 mobile.socket 文件，但现在出现以下错误

[error] 1083#0: *4 connect() to unix:/tmp/mobile.socket failed (111: Connection refused) while connecting to upstream

这只是 mobile.socket 文件的权限问题吗？如果是这样，我需要什么权限？

更新 2nginx 和 unicorn 似乎都运行正常

testapp@airmob:~/mobile/current$ ps aux | grep nginx

root      6761  0.0  0.1  71152  1224 ?        Ss   18:36   0:00 nginx: master process /usr/sbin/nginx
testapp   6762  0.0  0.1  71492  1604 ?        S    18:36   0:00 nginx: worker process
testapp   6763  0.0  0.1  71492  1604 ?        S    18:36   0:00 nginx: worker process
testapp   6764  0.0  0.1  71492  1604 ?        S    18:36   0:00 nginx: worker process
testapp   6765  0.0  0.1  71492  1604 ?        S    18:36   0:00 nginx: worker process
testapp  13071  0.0  0.0   8036   600 pts/0    R+   21:21   0:00 grep --color=auto nginx

Answer 1

我已在相关配置文件(unicorn.rb 和 nginx 默认)中将 mobile.socket 重命名为 mobile.sock，一切正常，无需创建任何套接字文件，它按预期工作。

如果应用服务器未运行(在我的例子中是 unicorn )，也会发生这种情况。 Unicorn 创建套接字，nginx 寻找它。如果套接字不存在，nginx 就会大惊小怪，所以如果你正在阅读这篇文章寻找解决方案，请确保你的应用程序服务器( unicorn )正在运行，并确保你的所有套接字名称在各种配置文件(unicorn.rb 和任何 nginx.conf 文件中都有提到的套接字)