Analysis of Nginx Server Load balancer application cases

Analysis of Nginx Server Load balancer application cases

Lab environment 1
1. test hardware preparation
Three virtual machines, two for load balancing, and one for RS

2. test software preparation
System: Red Hat6.4 x86_64
Software: nginx-1.8.1.tar.gz
3. Install the basic environment package (some systems already have it) before installation)
Yum install openssl
Yum install libjpeg-devel libpng-devel freetype-devel-y
Yum install libxml2 libxml2-devel zlib-devel ncurses-devel curl-devel-y
Yum install gd gd2 gd-level gd2-devel-y
4. Install the pcre package
Wget https://ftp.pcre.org/pub/pcre/pcre-8.32.tar.gz -- no-check-certificate
Tar-zxf pcre-8.32.tar.gz
./Configure
Compilation configuration error
Problem description:
Checking for dirent. h... yes
Checking windows. h usability... no
Checking windows. h presence... no
Checking for windows. h... no
Configure: error: You need a C ++ compiler for C ++ support.
Solution: The system package lacks the package for the C ++ compiler to install gcc-c ++.
Then install yum.
Make
Make install
Cd ../to the parent directory
=============================== Pcre Installation Complete ======================== ====================
5. Install nginx
Wget http://nginx.org/download/nginx-1.8.1.tar.gz
Tar-zxvf nginx-1.8.1.tar.gz
Cd nginx-1.8.1
./Configure -- user = nginx -- group = nginx -- prefix =/application/nginx-1.8.1 -- with-http_stub_status_module -- with-http_ssl_module
Note: -- user = nginx specifies the user
-- Group = nginx: specified group
-- Prefix =/application/nginx-1.8.1 specifies the installation path
-- With-http_stub_status_module Status Module
-- With-http_ssl_module ssl module
Useradd nginx-s/sbin/nologin-M needs to be created by the user-M does not create home directory-s specifies non-Login shell
Make
Make install
========= Nginx Installation Complete ======================================== ====================
6. Configuration after installation
Ln-s/application/nginx-1.8.1/application/nginx
Echo "/usr/local/lib">/etc/ld. so. conf
Tail-1/etc/ld. so. conf''
Ldconfig
/Application/nginx/sbin/nginx
[Root @ lb01 application] # ps-ef | grep nginx | grep-v grep
Root 17057 1 0? 00:00:00 nginx: master process/application/nginx/sbin/nginx
Nginx 17058 17057 0? 00:00:00 nginx: worker process
[Root @ lb01 application] # lsof-I tcp: 80
Command pid user fd type device size/OFF NODE NAME
Nginx 17057 root 6u IPv4 82990 0t0 TCP: Http (LISTEN)
Nginx 17058 nginx 6u IPv4 82990 0t0 TCP *: http (LISTEN)
7. Configure and debug the web server used for testing
Note: The operation is only performed on the following nginx web server nodes:

Configure and view web service configuration results
The two RS1 servers all follow the above steps for nginx service.
Run the following command:
RS1 (192.168.232.132)
Echo "www.etiantian132.org">/application/nginx/html/index.html
Cat/application/nginx/html/index.html
/Application/nginx/sbin/nginx-s reload
RS2 (192.168.232.133)
Echo "www.etiantian133.org">/application/nginx/html/index.html
Cat/application/nginx/html/index.html
/Application/nginx/sbin/nginx-s reload
Then you can view the display results under the Local curl.

Modify the master configuration file to achieve Load Balancing
Cd/application/nginx/conf
Mkdir extra create extra directory
Cd extra/
Vim ../nginx. conf

# User nobody; worker_processes 1; # error_log logs/error. log; # error_log logs/error. log notice; # error_log logs/error. log info; # pid logs/nginx. pid; events {worker_connections 1024;} http {include mime. types; default_type application/octet-stream; sendfile on; keepalive_timeout 65; include extra/upstream01.conf ;} ####################################### Delete we do not need to add this line of content include extra/upstream01.conf; then we need to create upstream01.conf under the extra directory and edit it vim extra/upstream01.conf # blog lb by cyt at 20180107 upstream blog_real_server {server 192.168.232.132: 80 weight = 5; # upstream defines the name of a vserver blog_real_server server 192.168.232.133: 80 weight = 5;} server {listen 80; server_name blog.etiantian.org; location/{proxy_pass http://blog_real_server ; # Use proxy_pass to define that if blog.etiantian.org is accessed, it will be automatically transferred to the two realservers defined under blog_real_server }}

Check syntax

Save and exit
[Root @ lb01 conf] #/application/nginx/sbin/nginx-t
Nginx: the configuration file/application/nginx-1.8.1/conf/nginx. conf syntax is OK
Nginx: configuration file/application/nginx-1.8.1/conf/nginx. conf test is successful
You also need to perform a local domain name resolution operation on the local machine to resolve the local ip address to blog.etiantian.org

Restart nginx on three machines
/Application/nginx/sbin/nginx-s reload
Then run the curl command to test

We can see that multiple executions are evenly distributed to two machines, but load balancing is achieved.