502 Bad Gateway with NGINX, Gunicorn, Django - django

Question

I tried setting up a project with NGINX and Gunicorn using this guide. However, I keep getting a 502 Bad Gateway error.
Here is my server conf:
server {
listen 80;
server_name nexus-staging.chop.edu;
access_log /webapps/nexus/logs/nginx/nexus-staging.chop.edu.access.log main;
error_log /webapps/nexus/logs/nginx/nexus-staging.chop.edu.error.log warn;
location = /favicon.ico { access_log off; log_not_found off; }
location /static/ {
root /webapps/nexus/static_cdn;
}
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:/webapps/nexus/nexus.sock;
}
}
Here is my gunicorn service file:
[Unit]
Description=gunicorn daemon
After=network.target
[Service]
EnvironmentFile=/etc/sysconfig/nexus
User=svc_dgdnexus
Group=dgd_svc
WorkingDirectory=/webapps/nexus
ExecStart=/webapps/nexus/pyvenv/bin/gunicorn --workers 4 --bind unix:/webapps/nexus/nexus.sock django_config.wsgi:application --name nexus --access-logfile /webapps/nexus/logs/gunicorn/nexus-staging.chop.edu.access.log --error-logfile /webapps/nexus/logs/gunicorn/nexus-staging.chop.edu.error.log
[Install]
WantedBy=multi-user.target
This is the nginx error:
2017/02/17 22:55:23 [error] 36168#0: *1 upstream prematurely closed connection while reading response header from upstream, client: 10.249.27.89, server: nexus-staging.chop.edu, request: "GET / HTTP/1.1", upstream: "http://unix:/webapps/nexus/nexus.sock:/", host: "nexus-staging.chop.edu"
This is the gunicorn error:
[2017-02-17 22:53:59 -0500] [36143] [INFO] Booting worker with pid: 36143
[2017-02-17 22:53:59 -0500] [36145] [INFO] Booting worker with pid: 36145
[2017-02-17 22:55:23 -0500] [36137] [CRITICAL] WORKER TIMEOUT (pid:36140)
[2017-02-18 03:55:23 +0000] [36140] [INFO] Worker exiting (pid: 36140)
[2017-02-17 22:55:23 -0500] [36202] [INFO] Booting worker with pid: 36202

Answer 1

I found a solution:
Here is my server conf:
server {
listen 80;
server_name nexus-staging.chop.edu;
access_log /webapps/nexus/logs/nginx/nexus-staging.chop.edu.access.log main;
error_log /webapps/nexus/logs/nginx/nexus-staging.chop.edu.error.log warn;
location = /favicon.ico { access_log off; log_not_found off; }
location /static/ {
alias /webapps/nexus/static_cdn/;
}
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_redirect off;
proxy_pass http://127.0.0.1:8000;
}
}
Here is the gunicorn service file:
[Unit]
Description=gunicorn daemon
After=network.target
After=syslog.target
[Service]
EnvironmentFile=/etc/sysconfig/nexus
User=svc_dgdnexus
Group=dgd_svc
WorkingDirectory=/webapps/nexus
ExecStart=/webapps/nexus/pyvenv/bin/gunicorn django_config.wsgi --workers 4 --access-logfile /webapps/nexus/logs/gunicorn/nexus-staging.chop.edu.access.log --error-logfile /webapps/nexus/logs/gunicorn/nexus-staging.chop.edu.error.log
Restart=on-failure
[Install]
WantedBy=multi-user.target
Make sure your ALLOWED_HOSTS in django settings is something like: .nexus-staging.chop.edu. The . is critical for it work.