Permission denied - nginx and uwsgi socket

Question

Well I am currently trying to get my django application served using nginx and uwsgi. I am currently using a virtual environment to which uwsgi is installed. However I am currently getting a 502 bad gateway error when attempting to access the page.

The Error I am experiencing.

2014/02/27 14:20:48 [crit] 29947#0: *20 connect() to unix:///tmp/uwsgi.sock failed (13: Permission denied) while connecting to upstream, client: 144.136.65.176, server: domainname.com.au, request: "GET /favicon.ico HTTP/1.1", upstream: "uwsgi://unix:///tmp/uwsgi.sock:", host: "www.domainname.com.au"

This is my nginx.conf

    # mysite_nginx.conf

# the upstream component nginx needs to connect to
upstream django {
    server unix:///tmp/uwsgi.sock; # for a file socket
    #server 127.0.0.1:8001; # for a web port socket (we'll use this first)
}

# configuration of the server
server {
    # the port your site will be served on
    listen      80;
    # the domain name it will serve for
    server_name .domainname.com.au; # substitute your machine's IP address or FQDN
    charset     utf-8;

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

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

    location /static {
        alias /home/deepc/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     /home/deepc/.virtualenvs/dcwebproj/dcweb/uwsgi_params; # the uwsgi_params file you installed
    }
}

Here is my uwsgi.ini file

[uwsgi]
socket=/tmp/uwsgi.sock
chmod-socket=644
uid = www-data
gid = www-data

chdir=/home/deepc/.virtualenvs/dcwebproj/dcweb
module=dcweb.wsgi:application
pidfile=/home/deepc/.virtualenvs/dcwebproj/dcweb.pid
vacuum=true

From what i have read on google its a permissions problem with the www-data group and /tmp/ directory. However I am new to this and have tried to changer the permission level of the folder to no avail. Could someone point me in the right direction? Is this a permissions problem.

Also is it ok practice to put the sock file in tmp directory?

Thanks

Answer 1

you need to uncomment

#server 127.0.0.1:8001;

from upstream block and similarly do the changes in uwsgi.ini as

socket = 127.0.0.1:8001

Answer 2

uwsgi.ini

[uwsgi]
uid = yourusername
gid = www-data
chmod-socket = 664

Why? Because sometimes the app needs to read or write to the file system beyond what's accessible to the web server. I don't want to change a whole bunch of ownership and permissions just to accommodate each such situation. I'd rather have my application run as me and do what it needs to do. Setting the group as www-data and chmoding the socket to 664 allows for that group to write to it, thus providing the only necessary window of communication between the web server and the app.

Answer 3

On CentOS, I tried all those things but still it did not work. Finally, I found this article:

https://www.nginx.com/blog/nginx-se-linux-changes-upgrading-rhel-6-6/

For a development machine, we simply run:

semanage permissive -a httpd_t

But for a real production server, I have not figured out. You may need to try other things described in the above article.