Nginx 启动后无法启动，但使用手动命令可以正常工作

Question

Nginx 启动后无法启动，但使用手动命令可以正常工作

我最近有了一台 Ubuntu 18 服务器，至少可以说我有点困惑。

第一：如果我运行sudo service nginx start或sudo systemctl start nginx，一切似乎都有效。我的网站加载，并且都sudo service nginx status和sudo systemctl status nginx返回的所有明确的信息。

现在的问题是：当我重新启动我的服务器时，nginx不会自动启动，因为网站没有被加载。我试过sudo systemmctl enable nginx又试了一次重新启动。同样，nginx由于网站未加载而未运行。

事实上，如果我重新启动我的服务器sudo reboot然后sudo service nginx status或者sudo systemctl status nginx我收到一条错误消息。尽管有错误消息，但我可以运行sudo service nginx start或者sudo systemctl start nginx它会全部恢复工作。

我收到的错误消息如下：

(venv) user@server:/data/project$ sudo systemctl status nginx
? nginx.service - A high performance web server and a reverse proxy server
   Loaded: loaded (/lib/systemd/system/nginx.service; enabled; vendor preset: enabled)
   Active: failed (Result: exit-code) since Tue 2019-02-26 17:50:18 CET; 1min 6s ago
     Docs: man:nginx(8)
  Process: 830 ExecStartPre=/usr/sbin/nginx -t -q -g daemon on; master_process on; (code=exited, status=1/FAILURE)

Feb 26 17:50:18 md3.tudelft.nl systemd[1]: Starting A high performance web server and a reverse proxy server...
Feb 26 17:50:18 md3.tudelft.nl nginx[830]: nginx: [emerg] open() "/data/project/uwsgi_params" failed (2: No such file or directory) in /etc/nginx/sites-enabled/paintingViewer.conf
Feb 26 17:50:18 md3.tudelft.nl nginx[830]: nginx: configuration file /etc/nginx/nginx.conf test failed
Feb 26 17:50:18 md3.tudelft.nl systemd[1]: nginx.service: Control process exited, code=exited status=1
Feb 26 17:50:18 md3.tudelft.nl systemd[1]: nginx.service: Failed with result 'exit-code'.
Feb 26 17:50:18 md3.tudelft.nl systemd[1]: Failed to start A high performance web server and a reverse proxy server.

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嗯，这看起来很简单：它找不到 uwsgi_params 文件。uwsgi_params 文件确实存在，而且它位于正确的位置。

我的nginx.conf 文件：

# the upstream component nginx needs to connect to
upstream django {
     server unix:///data/project/paintingViewer.sock; # for a file socket
    # server 127.0.0.1:8001; # for a web port socket -> works if we use Djano's build in webserver.
}

# configuration of the server
server {
    # the port your site will be served on
    listen      80;
    # the domain name it will serve for
    server_name server;
    charset     utf-8;

    # max upload size
    client_max_body_size 75M;   # adjust to taste

    # Django media
    location /media  {
        alias /data/project/media;  # your Django project's media files - amend as required
    }

    location /static {
        alias /data/project/static; # your Django project's static files - amend as required
    }

    # Finally, send all non-media requests to the Django server.
    location / {
        uwsgi_pass  django;
        include     /data/project/uwsgi_params; # the uwsgi_params file you installed
    }
}

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该/data/project/uwsgi_params文件是：

uwsgi_param  QUERY_STRING       $query_string;
uwsgi_param  REQUEST_METHOD     $request_method;
uwsgi_param  CONTENT_TYPE       $content_type;
uwsgi_param  CONTENT_LENGTH     $content_length;

uwsgi_param  REQUEST_URI        $request_uri;
uwsgi_param  PATH_INFO          $document_uri;
uwsgi_param  DOCUMENT_ROOT      $document_root;
uwsgi_param  SERVER_PROTOCOL    $server_protocol;
uwsgi_param  REQUEST_SCHEME     $scheme;
uwsgi_param  HTTPS              $https if_not_empty;

uwsgi_param  REMOTE_ADDR        $remote_addr;
uwsgi_param  REMOTE_PORT        $remote_port;
uwsgi_param  SERVER_PORT        $server_port;
uwsgi_param  SERVER_NAME        $server_name;

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现在，有几件事我不明白：

1）nginx如果我运行start命令，它怎么可能工作，但nginx在启动时不起作用？

2）无法找到文件的status读取，而它在一个？nginxuwsgistart

3) 我怎样才能nginx在重新启动时正常运行？