502 bad gateway: Nginx, gunicorn, Django-CodePudding

Here is my nginx.conf

user  nginx;
worker_processes  auto;

error_log  /var/log/nginx/error.log notice;
pid        /var/run/nginx.pid;


events {
    worker_connections  1024;
}


http {
    include       /etc/nginx/mime.types;
    default_type  application/octet-stream;

    log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
                      '$status $body_bytes_sent "$http_referer" '
                      '"$http_user_agent" "$http_x_forwarded_for"';

    access_log  /var/log/nginx/access.log  main;

    sendfile        on;
    #tcp_nopush     on;

    keepalive_timeout  65;

    #gzip  on;

    include /etc/nginx/conf.d/*.conf;

    server {
        listen 80;
        server_name 0.0.0.0;

        location = /favicon.ico { access_log off; log_not_found off; }
        location /static/ {
            root /myproject;
        }

        location / {
            proxy_set_header Host $http_host;
            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
            proxy_set_header X-Forwarded-Proto $scheme;
            proxy_pass http://unix:/root/myproject/myproject.sock;
        }
    }

}

And my project have this structure:

This is my Directory

This is my gunicorn.service file

[Unit]
Description=gunicorn daemon
Requires=gunicorn.socket
After=network.target

[Service]
User=root
Group=nginx
WorkingDirectory=/root/myproject/myproject
ExecStart=/root/myproject/myprojectenv/bin/gunicorn --access-logfile - --workers 3 --bind unix:/run/gunicorn.sock myproject.wsgi:application

[Install]
WantedBy=multi-user.target

error.log

2022/04/13 12:45:30 [crit] 20474#20474: *8 connect() to unix:/root/myproject/myproject.sock failed (2: No such file or directory) while connecting to upstream, client: 10.81.234.10, server: 0.0.0.0, request: "GET / HTTP/1.1", upstream: "http://unix:/root/myproject/myproject.sock:/", host: "10.10.89.8"

My gunicorn service is working properly and nginx.conf is also working properly with no errors.

All permissions have been granted to myproject directory Still I am getting a 502 Bad Gateway error.

Please let me know if any additional information needed

CodePudding user response：

The issue is you are creating the Socket file in different location and pointing the nginx to different location. Your socket file is created at /run/gunicorn.sock as you can see from this command

ExecStart=/root/myproject/myprojectenv/bin/gunicorn --access-logfile - --workers 3 --bind unix:/run/gunicorn.sock myproject.wsgi:application

and referring to it in different location(/root/myproject/myproject.sock) in nginx configuration as you can see here

            proxy_pass http://unix:/root/myproject/myproject.sock;

You can solve this in 2 ways

by changing gunicorn conf from

ExecStart=/root/myproject/myprojectenv/bin/gunicorn --access-logfile - --workers 3 --bind unix:/run/gunicorn.sock myproject.wsgi:application

ExecStart=/root/myproject/myprojectenv/bin/gunicorn --access-logfile - --workers 3 --bind unix:/root/myproject/myproject.sock myproject.wsgi:application

By changing nginx conf from

            proxy_pass http://unix:/root/myproject/myproject.sock;

            proxy_pass http://unix:/run/gunicorn.sock;

I recommend using the first approach

Restart both gunicorn and nginx after these changes