downloaded from here
documentation here
If you want to try different solution check it haproxy compiled with: ./configure --sbin-path=/usr/local/sbin --with-http_ssl_module --user=mongrel make make install
with fair balancing
Fair load balancing for nginx from here
./configure --with-http_ssl_module --user=mongre --add-module=/usr/local/src/gnosek-nginx-upstream-fair --prefix=/usr/local/nginx --error-log-path=/var/log --http-log-path=/var/log make && make install
base configuration from here
more and my favorite here is good overview of example config
init script from here
http://haproxy.1wt.eu/ is alternative for the nginx
I have one mongrel cluster which is serving multiple rails applications. In my example I host http://system3.spider.bg and http://www.psspy.se in one mongrel cluster. here are the conf files:
# cat nginx.conf
user mongrel mongrel;
worker_processes 2;
#error_log logs/error.log;
error_log logs/error.log notice;
#error_log logs/error.log info;
#pid logs/nginx.pid;
events {
#worker_connections 16385;
worker_connections 1024;
}
http {
default_type application/octet-stream;
include mime.types;
log_format main '$remote_addr - $remote_user [$time_local] $request '
'"$status" $body_bytes_sent "$http_referer" '
'"$http_user_agent" "$http_x_forwarded_for"';
access_log logs/access.log main;
server_tokens off;
sendfile on;
tcp_nopush on;
tcp_nodelay on;
#keepalive_timeout 0;
keepalive_timeout 65;
gzip on;
gzip_proxied any;
# gzip_http_version 1.1;
# gzip_comp_level 1;
gzip_types text/plain text/html text/css application/x-javascript text/xml application/xml application/xml+rss text/javascript;
upstream truckhandboken_proxy {
server 127.0.0.1:8000;
server 127.0.0.1:8001;
}
upstream system3_proxy {
server 127.0.0.1:8200;
server 127.0.0.1:8201;
server 127.0.0.1:8202;
server 127.0.0.1:8203;
server 127.0.0.1:8204;
server 127.0.0.1:8205;
server 127.0.0.1:8206;
server 127.0.0.1:8207;
server 127.0.0.1:8208;
server 127.0.0.1:8209;
}
include vhosts/*.conf;
server {
listen 80;
server_name localhost:80;
#charset koi8-r;
#access_log logs/host.access.log main;
location / {
root html;
index index.html index.htm;
}
#error_page 404 /404.html;
# redirect server error pages to the static page /50x.html
#
error_page 500 502 503 504 /50x.html;
location = /50x.html {
root html;
}
# proxy the PHP scripts to Apache listening on 127.0.0.1:80
#
#location ~ \.php$ {
# proxy_pass http://127.0.0.1;
#}
# pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000
#
#location ~ \.php$ {
# root html;
# fastcgi_pass 127.0.0.1:9000;
# fastcgi_index index.php;
# fastcgi_param SCRIPT_FILENAME /scripts$fastcgi_script_name;
# include fastcgi_params;
#}
# deny access to .htaccess files, if Apache's document root
# concurs with nginx's one
#
#location ~ /\.ht {
# deny all;
#}
}
# another virtual host using mix of IP-, name-, and port-based configuration
#
#server {
# listen 8000;
# listen somename:8080;
# server_name somename alias another.alias;
# location / {
# root html;
# index index.html index.htm;
# }
#}
# HTTPS server
#
#server {
# listen 443;
# server_name localhost;
# ssl on;
# ssl_certificate cert.pem;
# ssl_certificate_key cert.key;
# ssl_session_timeout 5m;
# ssl_protocols SSLv2 SSLv3 TLSv1;
# ssl_ciphers ALL:!ADH:!EXPORT56:RC4+RSA:+HIGH:+MEDIUM:+LOW:+SSLv2:+EXP;
# ssl_prefer_server_ciphers on;
# location / {
# root html;
# index index.html index.htm;
# }
#}
}
The virtual host file
# cat system3.conf
server {
listen 80;
#listen 192.168.1.1;
#listen 192.168.1.1:8080;
server_name system3.spider.bg www.system3.spider.bg;
access_log logs/system3.access.log main;
location / {
proxy_pass http://system3_proxy;
proxy_redirect off;
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
client_max_body_size 10m;
client_body_buffer_size 128k;
proxy_connect_timeout 90;
proxy_send_timeout 90;
proxy_read_timeout 90;
proxy_buffer_size 4k;
proxy_buffers 4 32k;
proxy_busy_buffers_size 64k;
proxy_temp_file_write_size 64k;
}
}
server {
listen 80;
#listen 192.168.1.1;
#listen 192.168.1.1:8080;
server_name *.psspy.se psspy.se;
root /home/mongrel/system3/current/public;
access_log logs/psspy_access.log main;
# Set the max size for file uploads to 50Mb
client_max_body_size 50M;
# this rewrites all the requests to the maintenance.html
# page if it exists in the doc root. This is for capistrano's
# disable web task
if (-f $document_root/system/maintenance.html) {
rewrite ^(.*)$ /system/maintenance.html last;
break;
}
location = / {
if (-f /index.html){
rewrite (.*) /index.html last;
}
proxy_pass http://system3_proxy/dagensps;
proxy_redirect off;
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
}
location / {
proxy_redirect off;
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
client_max_body_size 10m;
client_body_buffer_size 128k;
proxy_connect_timeout 90;
proxy_send_timeout 90;
proxy_read_timeout 90;
proxy_buffer_size 4k;
proxy_buffers 4 32k;
proxy_busy_buffers_size 64k;
proxy_temp_file_write_size 64k;
# If the file exists as a static file serve it directly without
# running all the other rewite tests on it
if (-f $request_filename) {
break;
}
# check for index.html for directory index
# if its there on the filesystem then rewite
# the url to add /index.html to the end of it
# and then break to send it to the next config rules.
if (-f $request_filename/index.html) {
rewrite (.*) $1/index.html break;
}
# this is the meat of the rails page caching config
# it adds .html to the end of the url and then checks
# the filesystem for that file. If it exists, then we
# rewite the url to have explicit .html on the end
# and then send it on its way to the next config rule.
# if there is no file on the fs then it sets all the
# necessary headers and proxies to our upstream mongrels
if (-f $request_filename.html) {
rewrite (.*) $1.html break;
}
if (!-f $request_filename) {
proxy_pass http://system3_proxy;
break;
}
} # location
error_page 500 502 503 504 /500.html;
location = /500.html {
root /home/mongrel/system3/current/public/500.html;
}
error_page 404 /404.html;
location = /404.html {
root /home/mongrel/system3/current/public/404.html;
}
}# server
Good text: http://rubypond.com/articles/2008/02/01/setting-up-nginx-ssl-and-virtual-hosts/
There is generartor gem nginx_config_generator
example scripts: http://topfunky.net/svn/shovel/nginx/
nginx connects directly to memcached for caching
for restarting nice you might want to see seesaw gem (presentation here) or this blog