Pur*_*res 3 ubuntu nginx ruby-on-rails thin
我在 Rails 上全新安装了 nginx 和 ruby。但在测试时它给了我一个“500 内部服务器错误”。
\n\n我的应用程序的 error.log 具有以下内容：
\n\n2014/05/01 17:27:15 [alert] 1423#0: *6892 768 worker_connections are not enough while connecting to upstream, client: 24.15.27.113, server: example.com, request: "GET / HTTP/1.0", upstream: "http://24.15.27.113:80/", host: "myapp"\n2014/05/01 17:27:16 [alert] 1423#0: *7656 768 worker_connections are not enough while connecting to upstream, client: 24.15.27.113, server: example.com, request: "GET /favicon.ico HTTP/1.0", upstream: "http://24.15.27.113:80/favicon.ico", host: "myapp"\n2014/05/01 17:45:50 [alert] 1453#0: *766 768 worker_connections are not enough while connecting to upstream, client: 24.15.27.113, server: example.com, request: "GET / HTTP/1.0", upstream: "http://24.15.27.113:80/", host: "myapp"\n2014/05/01 17:45:50 [alert] 1453#0: *1530 768 worker_connections are not enough while connecting to upstream, client: 24.15.27.113, server: example.com, request: "GET /favicon.ico HTTP/1.0", upstream: "http://24.15.27.113:80/favicon.ico", host: "myapp"\nnginx.conf 有以下内容：
\n\nuser www-data;\nworker_processes 4;\npid /var/run/nginx.pid;\n\nevents {\n worker_connections 768;\n}\n\nhttp {\n\n ##\n # Basic Settings\n ##\n\n sendfile on;\n tcp_nopush on;\n tcp_nodelay on;\n keepalive_timeout 65;\n types_hash_max_size 2048;\n\n include /etc/nginx/mime.types;\n default_type application/octet-stream;\n\n ##\n # Logging Settings\n ##\n\n access_log /var/log/nginx/access.log;\n error_log /var/log/nginx/error.log;\n\n ##\n # Gzip Settings\n ##\n\n gzip on;\n gzip_disable "msie6";\n\n ##\n # Virtual Host Configs\n ##\n\n include /etc/nginx/conf.d/*.conf;\n include /etc/nginx/sites-enabled/*;\n\n fastcgi_buffers 8 16k;\n fastcgi_buffer_size 32k;\n}\nmyapp.example.com 配置文件：
\n\nupstream myapp {\n #server 24.15.27.113;\n #server 24.15.27.113:3001;\n #server 24.15.27.113:3002;\n server 127.0.0.1:3000;\n server 127.0.0.1:3001;\n #server 127.0.0.1:3002;\n}\nserver {\n listen 80;\n server_name .example.com;\n\n access_log /var/www/myapp.example.com/log/access.log;\n error_log /var/www/myapp.example.com/log/error.log;\n root /var/www/myapp.example.com;\n index index.html;\n\n location / {\n proxy_set_header X-Real-IP $remote_addr;\n proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;\n proxy_set_header Host $http_host;\n proxy_redirect off;\n try_files /system/maintenance.html $uri $uri/index.html $uri.html @ruby;\n }\n\n location @ruby {\n proxy_pass http://myapp;\n }\n}\n在上游块内切换回使用 ip 127.0.0.1:3000 和 127.0.0.1:3001 后，服务器生成错误：
\n\n2014/05/05 10:34:39 [error] 6158#0: *2 no live upstreams while connecting to upstream, client: 52.74.130.210, server: example.com, request: "GET /favicon.ico HTTP/1.1", upstream: "http://127.0.0.1:3001\xe2\x80\x9d, host: "24.15.27.113"\n\n2014/05/05 10:34:39 [error] 6158#0: *2 no live upstreams while connecting to upstream, client: 52.74.130.210, server: example.com, request: "GET /favicon.ico HTTP/1.1", upstream: "http://127.0.0.1:3000/", host: "24.15.27.113"\n\n2014/05/05 10:34:39 [error] 6158#0: *2 no live upstreams while connecting to upstream, client: 52.74.130.210, server: example.com, request: "GET /favicon.ico HTTP/1.1", upstream: "http://myapp/favicon.ico", host: "24.15.27.113"\n更新 05/05/2014：\n我运行以下命令来检查连接：
\n\ntelnet 127.0.0.1 3000 \n结果是：
\n\nTrying 127.0.0.1...\ntelnet: Unable to connect to remote host: Connection refused\n我尝试重新启动瘦服务器，但收到错误消息。
\n\nthin restart -C /etc/thin/myapp.example.com -o 3000\n错误：
\n\n/usr/local/rvm/gems/ruby-2.1.1/gems/thin-1.6.2/lib/thin/daemonizing.rb:129:in `send_signal\': Can\'t stop process, no PID found in tmp/pids/thin.3000.pid (Thin::PidFileNotFound)\nfrom /usr/local/rvm/gems/ruby-2.1.1/gems/thin-1.6.2/lib/thin/daemonizing.rb:111:in `kill\'\nfrom /usr/local/rvm/gems/ruby-2.1.1/gems/thin-1.6.2/lib/thin/controllers/controller.rb:94:in `block in stop\'\n小智 5
老问题，但我有同样的问题，并且接受的答案对我不起作用。
我必须增加worker_connections的数量，如此处所述。
/etc/nginx/nginx.conf
events {
worker_connections 20000;
}