Nginx’s load balancing

一、安装

OS: RHEL Community Version(Rocky8/Alma8) minimal（安装时的选项）

0. prepare

#dnf -y install gcc gcc-c++ automake make pcre pcre-devel zlib zlib-devel openssl openssl-devel

see update openssl

Library devel

$sudo dnf install gd-devel libxml2-devel libxslt-devel

GeoIP

Download latest atomic-release
Install atomic-release rpm:

$sudo rpm -Uvh http://www6.atomicorp.com/channels/atomic/centos/8/x86_64/RPMS/atomic-release-1.0-23.el8.art.noarch.rpm

Install GeoIP-devel rpm package:

$sudo dnf install GeoIP-devel

allow fw

$sudo firewall-cmd --permanent --zone=public --add-port=80/tcp
$sudo firewall-cmd --reload

installation

First, install Nginx of centos repo;
Then, replace the nginx program file.
Note: The replaced program file version must be the same as the repo!

/etc/yum.repos.d/nginx.repo:

[nginx-stable]
name=nginx stable repo
baseurl=http://nginx.org/packages/centos/$releasever/$basearch/
gpgcheck=1
enabled=1
gpgkey=https://nginx.org/keys/nginx_signing.key
module_hotfixes=true

install:

$sudo dnf install -y nginx

1) down

$curl --progress https://nginx.org/download/nginx-1.22.0.tar.gz | tar xz

2) setup module

see arguments:

$nginx -V

GD lib

--with-http_image_filter_module=dynamic

libxml2/libxslt

--with-http_xslt_module=dynamic

GeoIP library

--with-http_geoip_module=dynamic

param list

./configure --prefix=/etc/nginx \
 --sbin-path=/usr/sbin/nginx \
 --modules-path=/usr/lib64/nginx/modules \
 --conf-path=/etc/nginx/nginx.conf \
 --error-log-path=/var/log/nginx/error.log \
 --http-log-path=/var/log/nginx/access.log \
 --pid-path=/var/run/nginx.pid --lock-path=/var/run/nginx.lock \
 --http-client-body-temp-path=/var/cache/nginx/client_temp \
 --http-proxy-temp-path=/var/cache/nginx/proxy_temp \
 --http-fastcgi-temp-path=/var/cache/nginx/fastcgi_temp \
 --http-uwsgi-temp-path=/var/cache/nginx/uwsgi_temp \
 --http-scgi-temp-path=/var/cache/nginx/scgi_temp \
 --user=nginx \
 --group=nginx \
 --with-compat \
 --with-file-aio \
 --with-threads \
 --with-http_addition_module \
 --with-http_auth_request_module \
 --with-http_dav_module \
 --with-http_flv_module \
 --with-http_gunzip_module \
 --with-http_gzip_static_module \
 --with-http_mp4_module \
 --with-http_random_index_module \
 --with-http_realip_module \
 --with-http_secure_link_module \
 --with-http_slice_module \
 --with-http_ssl_module \
 --with-http_stub_status_module \
 --with-http_sub_module \
 --with-http_v2_module \
 --with-mail \
 --with-mail_ssl_module --with-stream --with-stream_realip_module --with-stream_ssl_module --with-stream_ssl_preread_module --with-http_image_filter_module=dynamic --with-http_xslt_module=dynamic --with-http_geoip_module=dynamic --with-cc-opt='-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector-strong --param=ssp-buffer-size=4 -grecord-gcc-switches -m64 -mtune=generic -fPIC' --with-ld-opt='-Wl,-z,relro -Wl,-z,now -pie'

3) Gen program

$make

Copy nginx and all .so files in the objs folder.

main program

$sudo cp -rfp objs/nginx /usr/sbin/

all so file

$sudo cp objs/*.so /usr/lib64/nginx/modules/

run

start

$sudo /usr/sbin/nginx

restart

$sudo /usr/sbin/nginx -s reload

二、配置

libs path:

/usr/lib64/nginx/

0. load lib

/etc/nginx/nginx.conf add add below in the main context:

load_module "modules/ngx_http_geoip_module.so";
load_module "modules/ngx_http_image_filter_module.so";
load_module "modules/ngx_http_xslt_filter_module.so";

1. load balancing

Official website recommended configuration changes

upstream

/etc/nginx/nginx.conf

http {
    upstream localhost {
        server 192.168.0.122:8080 weight=6; ## local
        server 192.168.0.127:8080 weight=3;
    }
}

proxy

/etc/nginx/conf.d/default.conf

server {
    listen 80;

    location / {
        proxy_connect_timeout 3;
        proxy_send_timeout 30;
        proxy_read_timeout 30;
        proxy_pass http://localhost;
    }
}

Reference

nginx - load balancing

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