Centos7,when I connect to my website, shows 502 Bad Gateway,
I test my website with command
uwsgi --ini
systemctl start nginx
And I cant figure out what's happened,please help me!
here's nginx.conf
upstream django {
server 127.0.0.1:8000;
}
server {
listen 80 default_server;
listen [::]:80 default_server;
server_name example.com;
charset utf-8;
include /etc/nginx/default.d/*.conf;
location / {
include uwsgi_params;
uwsgi_pass django;
}
location /static/ {
alias /usr/local/etc/dmp/static/;
}
}
and uwsgi setting
[uwsgi]
chdir = /usr/local/etc/dmp
module = DMP_python.wsgi
plugins = python3
socket = :8000
chmod-socket = 666
master = true
processes = 2
vacuum = true
You're using the wrong setting to tell uwsgi to use an HTTP port. You need http-socket
rather than socket
.
There can be multiple reasons for which an upstream might return invalid or even do not return any response
Verify if upstream uwsgi is actually running locally in the centos instance and can handle incoming requests
for this to verify run it as http-socket = :8000
in uwsgi.ini and then run uwsgi --ini uwsgi.ini
if uwsgi running fine on localhost, then change config back to socket = :8000
On centos 7.x SELinux package is enabled and runs in enforcing mode. So it won't allow nginx to write/connect to a socket.
- verify if SELinux has the policy for nginx to write to sockets
- check if read/connect/write to socket is allowed
grep nginx /var/log/audit/audit.log | audit2allow -m nginx
- do so by
grep nginx /var/log/audit/audit.log | audit2allow -M nginx
- and finally
semodule -i nginx.pp
- permission to connect to socket issue should be resolved by now
- verify if nginx can do network connection with upstream. Check nginx error.log or
getsebool -a | grep httpd
- to allow it run
setsebool httpd_can_network_connect on -P