Problem with running Django with nginx and uwsgi in Ubuntu

[אורי‎]

Django users,

I'm trying to install a new server, and I can't run Django with nginx and uwsgi. I receive an error "502 Bad Gateway" and there are messages on the error log which I don't understand:

2019/07/20 10:50:44 [error] 2590#2590: *1 upstream prematurely closed connection while reading response header from upstream, client: 79.183.208.33, server: *.speedy.net.3.speedy-technologies.com, request: "GET / HTTP/1.1", upstream: "uwsgi://unix:/run/uwsgi/app/speedy_net/socket:", host: "3.speedy-technologies.com"

I have 4 websites and here is the main (default) configuration file:

server {
    listen [::]:80 default_server;
    listen 80 default_server;
    server_name *.speedy.net.3.speedy-technologies.com speedy.net.3.speedy-technologies.com;

    access_log /var/log/nginx/speedy-net.access.log;
    error_log /var/log/nginx/speedy-net.error.log;

    client_max_body_size 50M;

    root  /home/ubuntu/speedy-net/speedy/net/static_serve/root;
    try_files $uri @uwsgi;

    location @uwsgi {
        include uwsgi_params;
        uwsgi_pass unix:/run/uwsgi/app/speedy_net/socket;
    }

    location /admin/ {
        auth_basic "admin site";
        auth_basic_user_file /etc/nginx/htpasswd_admin;
        include uwsgi_params;
        uwsgi_pass unix:/run/uwsgi/app/speedy_net/socket;
    }

    location /static {
        alias /home/ubuntu/speedy-net/speedy/net/static_serve;
        access_log off;
        # expires max;
        gzip on;
        gzip_min_length 1100;
        gzip_buffers 4 32k;
        gzip_types text/css text/javascript text/xml text/plain text/x-component application/javascript application/x-javascript application/json application/xml  application/rss+xml font/truetype application/x-font-ttf font/opentype application/vnd.ms-fontobject image/svg+xml;
        gzip_vary on;
        gzip_comp_level 6;
    }
}

And:

[uwsgi]
project = net

chdir = /home/ubuntu/speedy-net
home = %(chdir)/env
module = speedy.%(project).wsgi:application

plugins = python3
master = true
processes = 4

chmod-socket = 666
vacuum = true

uid = ubuntu
gid = ubuntu

touch-reload = /run/uwsgi/app/speedy_%(project)/reload

I tried to test with sudo nginx -t but I received a message that my configuration is OK. What is the problem?

Edit:

The old server (which is working):

$ find /run/uwsgi/ -ls
  489      0 drwxr-xr-x   3 root     root           60 Jul 20 08:41 /run/uwsgi/
  490      0 drwxr-xr-x   6 root     root          120 Jul 20 08:41 /run/uwsgi/app
  500      0 drwxr-xr-x   2 ubuntu   ubuntu        100 Jul 20 08:42 /run/uwsgi/app/speedy_net
  523      0 -rw-rw-r--   1 ubuntu   ubuntu          0 Jul 20 08:43 /run/uwsgi/app/speedy_net/reload
  501      0 srw-rw-rw-   1 ubuntu   ubuntu          0 Jul 20 08:41 /run/uwsgi/app/speedy_net/socket
  457      4 -rw-r--r--   1 root     root            5 Jul 20 08:41 /run/uwsgi/app/speedy_net/pid
  498      0 drwxr-xr-x   2 ubuntu   ubuntu        100 Jul 20 08:42 /run/uwsgi/app/speedy_match
  524      0 -rw-rw-r--   1 ubuntu   ubuntu          0 Jul 20 08:43 /run/uwsgi/app/speedy_match/reload
  499      0 srw-rw-rw-   1 ubuntu   ubuntu          0 Jul 20 08:41 /run/uwsgi/app/speedy_match/socket
  413      4 -rw-r--r--   1 root     root            5 Jul 20 08:41 /run/uwsgi/app/speedy_match/pid
  495      0 drwxr-xr-x   2 ubuntu   ubuntu        100 Jul 20 08:43 /run/uwsgi/app/speedy_mail
  528      0 -rw-rw-r--   1 ubuntu   ubuntu          0 Jul 20 08:43 /run/uwsgi/app/speedy_mail/reload
  497      0 srw-rw-rw-   1 ubuntu   ubuntu          0 Jul 20 08:41 /run/uwsgi/app/speedy_mail/socket
  496      4 -rw-r--r--   1 root     root            5 Jul 20 08:41 /run/uwsgi/app/speedy_mail/pid
  491      0 drwxr-xr-x   2 ubuntu   ubuntu        100 Jul 20 08:42 /run/uwsgi/app/speedy_composer
  527      0 -rw-rw-r--   1 ubuntu   ubuntu          0 Jul 20 08:43 /run/uwsgi/app/speedy_composer/reload
  494      0 srw-rw-rw-   1 ubuntu   ubuntu          0 Jul 20 08:41 /run/uwsgi/app/speedy_composer/socket
  493      4 -rw-r--r--   1 root     root            5 Jul 20 08:41 /run/uwsgi/app/speedy_composer/pid

The new server:

$ find /run/uwsgi/ -ls
  554      0 drwxr-xr-x   3 root     root           60 Jul 20 10:15 /run/uwsgi/
  555      0 drwxr-xr-x   6 root     root          120 Jul 20 11:14 /run/uwsgi/app
  573      0 drwxr-xr-x   2 ubuntu   ubuntu         80 Jul 20 11:14 /run/uwsgi/app/speedy_net
  598      0 srw-rw-rw-   1 ubuntu   ubuntu          0 Jul 20 11:14 /run/uwsgi/app/speedy_net/socket
  584      4 -rw-r--r--   1 root     root            5 Jul 20 11:14 /run/uwsgi/app/speedy_net/pid
  568      0 drwxr-xr-x   2 ubuntu   ubuntu         80 Jul 20 11:14 /run/uwsgi/app/speedy_match
  572      0 srw-rw-rw-   1 ubuntu   ubuntu          0 Jul 20 11:14 /run/uwsgi/app/speedy_match/socket
  569      4 -rw-r--r--   1 root     root            5 Jul 20 11:14 /run/uwsgi/app/speedy_match/pid
  565      0 drwxr-xr-x   2 ubuntu   ubuntu         80 Jul 20 11:14 /run/uwsgi/app/speedy_mail
  567      0 srw-rw-rw-   1 ubuntu   ubuntu          0 Jul 20 11:14 /run/uwsgi/app/speedy_mail/socket
  566      4 -rw-r--r--   1 root     root            5 Jul 20 11:14 /run/uwsgi/app/speedy_mail/pid
  499      0 drwxr-xr-x   2 ubuntu   ubuntu         80 Jul 20 11:14 /run/uwsgi/app/speedy_composer
  564      0 srw-rw-rw-   1 ubuntu   ubuntu          0 Jul 20 11:14 /run/uwsgi/app/speedy_composer/socket
  561      4 -rw-r--r--   1 root     root            5 Jul 20 11:14 /run/uwsgi/app/speedy_composer/pid

The old server is Ubuntu 16.04.6 LTS, and the new server is Ubuntu 18.04.2 LTS.

I also tried to ask on Stack Overflow but I didn't find a solution.

Any ideas?

אורי

u...@speedy.net

[Joseph Msembi]

Try this documentation.

https://uwsgi-docs.readthedocs.io/en/latest/tutorials/Django_and_nginx.html

Django users,

  490      0 drwxr-xr-x   6 root     root          120 Jul 20 <span class="gmail-lit" style="margin:0px;padding:0px;border:0px;font-style:inherit;font-variant:inherit;font-weight:inherit;font-stretch:inherit;line-height:inherit;font-family:inherit;v

[Aldian Fazrihady]

Try increasing client_max_body_size. For example, ```client_max_body_size 75M```

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Regards,

Aldian Fazrihady
http://aldianfazrihady.com

[Kean Dumba]

Thanks Aldian,

The community have reached out to me with thoughts, as well as guidance, I.e. django for girls, django forums and github 

These resources have made a significant  difference, things are working and I’m slowly learning.

the community are welcoming, knowledgable, helpful and patient, espevialk  to us ‘newbs’ who have no programming experience. 

Big Thank you to the django and python community, it is valued. 

Best,

Kean 

[אורי‎]

Thanks for your suggestions, I'll try it.

אורי

u...@speedy.net