Cómo configurar nginx - gunicorn - django
NGINX
Para configurar nginx es necesario, en primer lugar, crear un archivo específico para nuestro sitio web, esto es, un archivo de configuración para nuestro proyecto:
sudo touch /etc/nginx/sites-available/myproject
Luego al editarlo podemos poner una configuración básica:
sudo vim /etc/nginx/sites-available/myproject
Este archivo de configuración sirve para levantar el "server" que se va a encargar de servir (de entregar) los archivos estaticos que nos lleguen a nuestro servidor. Ahora bien, un server puede alojar multiples sitios. Para indicarle, los pedidos, requests, de nuestro dominio en particular se indica el "server_name", que puede ser un dominio o una direccion ip válida:
server {
listen 80;
server_name www.midominio.com dominio.com 192.168.1.15;
}
Las configuraciones de nginx son muchas, porque no solo sirve para alojar sitios de Django, sino porque puede ser utilizado como proxy o como muchas cosas mas. Una configuración más compleja podría ser por ejemplo la siguiente:
worker_processes 1;
user nobody nogroup;
# 'user nobody nobody;' for systems with 'nobody' as a group instead
pid /tmp/nginx.pid;
error_log /tmp/nginx.error.log;
events {
worker_connections 1024; # increase if you have lots of clients
accept_mutex off; # set to 'on' if nginx worker_processes > 1
# 'use epoll;' to enable for Linux 2.6+
# 'use kqueue;' to enable for FreeBSD, OSX
}
http {
include mime.types;
# fallback in case we can't determine a type
default_type application/octet-stream;
access_log /tmp/nginx.access.log combined;
sendfile on;
upstream app_server {
# fail_timeout=0 means we always retry an upstream even if it failed
# to return a good HTTP response
# for UNIX domain socket setups
server unix:/tmp/gunicorn.sock fail_timeout=0;
# for a TCP configuration
# server 192.168.0.7:8000 fail_timeout=0;
}
server {
# if no Host match, close the connection to prevent host spoofing
listen 80 default_server;
return 444;
}
server {
# use 'listen 80 deferred;' for Linux
# use 'listen 80 accept_filter=httpready;' for FreeBSD
listen 80;
client_max_body_size 4G;
# set the correct host(s) for your site
server_name example.com www.example.com;
keepalive_timeout 5;
# path for static files
root /path/to/app/current/public;
location / {
# checks for static file, if not found proxy to app
try_files $uri @proxy_to_app;
}
location @proxy_to_app {
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
# enable this if and only if you use HTTPS
# proxy_set_header X-Forwarded-Proto https;
proxy_set_header Host $http_host;
# we don't want nginx trying to do something clever with
# redirects, we set the Host: header above already.
proxy_redirect off;
proxy_pass http://app_server;
}
error_page 500 502 503 504 /500.html;
location = /500.html {
root /path/to/app/current/public;
}
}
}
para ver más acerca de esta configuración nginx.conf
En nuestro caso una configuración podria ser la siguiente:
upstream hello_app_server {
# fail_timeout=0 means we always retry an upstream even if it failed
# to return a good HTTP response (in case the Unicorn master nukes a
# single worker for timing out).
server unix:/webapps/hello_django/run/gunicorn.sock fail_timeout=0;
}
server {
listen 80;
server_name example.com;
client_max_body_size 4G;
access_log /webapps/hello_django/logs/nginx-access.log;
error_log /webapps/hello_django/logs/nginx-error.log;
location /static/ {
alias /webapps/hello_django/static/;
}
location /media/ {
alias /webapps/hello_django/media/;
}
location / {
# an HTTP header important enough to have its own Wikipedia entry:
# http://en.wikipedia.org/wiki/X-Forwarded-For
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
# enable this if and only if you use HTTPS, this helps Rack
# set the proper protocol for doing redirects:
# proxy_set_header X-Forwarded-Proto https;
# pass the Host: header from the client right along so redirects
# can be set properly within the Rack application
proxy_set_header Host $http_host;
# we don't want nginx trying to do something clever with
# redirects, we set the Host: header above already.
proxy_redirect off;
# set "proxy_buffering off" *only* for Rainbows! when doing
# Comet/long-poll stuff. It's also safe to set if you're
# using only serving fast clients with Unicorn + nginx.
# Otherwise you _want_ nginx to buffer responses to slow
# clients, really.
# proxy_buffering off;
# Try to serve static files from nginx, no point in making an
# *application* server like Unicorn/Rainbows! serve static files.
if (!-f $request_filename) {
proxy_pass http://hello_app_server;
break;
}
}
# Error pages
error_page 500 502 503 504 /500.html;
location = /500.html {
root /webapps/hello_django/static/;
}
}
Luego debemos crear un link simbolico a nuestra configuracion
sudo ln -s /etc/nginx/sites-available/myproject /etc/nginx/sites-enabled
Algunos comandos básicos para manejar nginx son:
sudo nginx -t
sudo systemctl restart nginx