Nginx : Load Balancing2023/07/04 |
Configure Nginx as a Load Balancing Server.
This example is based on the environment like follows. -----------+---------------------------+----- | | |10.0.0.31 | +----------+-----------+ | | [ www.srv.world ] | | | Nginx | | +----------------------+ | | ------------+--------------------------+--------------------------+------------ | | | |10.0.0.51 |10.0.0.52 |10.0.0.53 +-----------+----------+ +-----------+----------+ +-----------+----------+ | [ node01.srv.world ] | | [ node02.srv.world ] | | [ node03.srv.world ] | | Web Server#1 | | Web Server#2 | | Web Server#3 | +----------------------+ +----------------------+ +----------------------+ |
[1] | |
[2] | Configure Nginx. |
root@www:~#
vi /etc/nginx/nginx.conf # add into [http] section # [backup] means this server is balanced only when other servers are down # [weight=*] means balancing weight
http {
upstream backends {
server node01.srv.world:80 weight=2;
server node02.srv.world:80;
server node03.srv.world:80 backup;
}
root@www:~#
vi /etc/nginx/sites-available/default # change content like follows # replace server name or certificates to yours
server {
listen 80 default_server;
listen [::]:80 default_server;
listen 443 ssl http2 default_server;
listen [::]:443 ssl http2 default_server;
server_name www.srv.world;
ssl_certificate "/etc/letsencrypt/live/www.srv.world/fullchain.pem";
ssl_certificate_key "/etc/letsencrypt/live/www.srv.world/privkey.pem";
ssl_session_cache shared:SSL:1m;
ssl_session_timeout 10m;
proxy_redirect off;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header Host $http_host;
location / {
proxy_pass http://backends;
}
}
systemctl reload nginx |
[3] | Configure backend Nginx server to log X-Forwarded-For header. |
root@node01:~#
vi /etc/nginx/nginx.conf # add [log_format] setting into [http] section
http {
log_format main '$remote_addr - $remote_user [$time_local] "$request" '
'$status $body_bytes_sent "$http_referer" '
'"$http_user_agent" "$http_x_forwarded_for"';
root@node01:~#
vi /etc/nginx/sites-available/default # add into [server] section # specify your local network for [set_real_ip_from]
server {
listen 80 default_server;
listen [::]:80 default_server;
set_real_ip_from 10.0.0.0/24;
real_ip_header X-Forwarded-For;
root@node01:~# systemctl reload nginx |
[4] | Verify it works fine to access to frontend Nginx Server from any Client Computer. |
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