Varnish server in front of nginx server with multiple virtualhosts
- by Garreth 00
I have tried to search for a solution for this, but can't find any documentation/tips on my specific setup.
My setup:
Backendserver: ngnix: 2 different websites (2 top domains) in virtualenv, running gunicorn/python/django
Backendserver hardware(VPS) 2gb ram, 8 CPU
Databaseserver: postgresql - pg_bouncer
Backendserver hardware (VPS) 1gb ram, 8 CPU
Varnishserver: only running varnish
Varnishserver hardware (VPS) 1gb ram, 8 CPU
I'm trying to set up a varnish server to handle rare spike in traffic (20 000 unique req/s) The spike happens when a tv program mention one of the sites.
What do I need to do, to make the varnish server cache both sites/domains on my backendserver?
My /etc/varnish/default.vcl :
backend django_backend {
.host = "local.backendserver.com";
.port = "8080";
}
My /usr/local/nginx/site-avaible/domain1.com
upstream gunicorn_domain1 {
server unix:/home/<USER>/.virtualenvs/<DOMAIN1>/<APP1>/run/gunicorn.sock fail_timeout=0;
}
server {
listen 80;
listen 8080;
server_name domain1.com;
rewrite ^ http://www.domains.com$request_uri? permanent;
}
server {
listen 80 default_server;
listen 8080;
client_max_body_size 4G;
server_name www.domain1.com;
keepalive_timeout 5;
# path for static files
root /home/<USER>/<APP>-media/;
location / {
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header Host $http_host;
proxy_redirect off;
if (!-f $request_filename) {
proxy_pass http://gunicorn_domain1;
break;
}
}
}
My /usr/local/nginx/site-avaible/domain2.com
upstream gunicorn_domain2 {
server unix:/home/<USER>/.virtualenvs/<DOMAIN2>/<APP2>/run/gunicorn.sock fail_timeout=0;
}
server {
listen 80;
listen 8080;
server_name domain2.com;
rewrite ^ http://www.domains.com$request_uri? permanent;
}
server {
listen 80;
listen 8080;
client_max_body_size 4G;
server_name www.domain2.com;
keepalive_timeout 5;
# path for static files
root /home/<USER>/<APP>-media/;
location / {
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header Host $http_host;
proxy_redirect off;
if (!-f $request_filename) {
proxy_pass http://gunicorn_domain2;
break;
}
}
}
Right now, If I try the Ip of the varnishserver I only get served domain1.com. Would everything be correct if I change the DNS of the two domain to point to the varnishserver, or is there extra setup before it would work?
Question 2: Do I need a dedicated server for varnish, or could I just install varnish on my backendserver, or would the server run out of memory quick?
