Introduction to TOMCAT cluster under NGINX reverse proxy

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Nginx has the characteristics of reverse proxy (note the difference with forward proxy) and load balancing.

This time Nginx is installed on the linux machine 192.168.1.108. To install Nginx, you must first install the openssl library, gcc, PCRE, zlib library, etc.

Tomcat is installed on two machines, 192.168.1.168 and 192.168.1.178. The client accesses the project content deployed by Tomcat in

192.168.1.168 and 192.168.1.178 by accessing the 192.168.1.108 reverse proxy.

1. Install Nginx under Linux (machine 192.168.1.108)

Install openssl library.

yum install -y openssl openssl-devel

Need to install gcc: yum install gcc-c++

Install PCRE yum install -y pcre pcre-devel

##Install zlib library

yum install -y zlib zlib-devel

##Download nginx: wget

http://nginx.org/download /nginx-1.

13.0.tar.gzInstalled under /usr/local/

Unzip tar -zxvf nginx-1.13.0.tar.gz

Enter the directory and run ./configure to generate make

file

At this time, there is an extra makefile in the directory

Compile make

Installation: make install

After completion, there will be an additional nginx in the local directory

##Start nginx

Enter the sbin directory to execute. /nginx

View startup results

Window access 192.168.1.108 nginx default port is 80

Close./nginx -s stop

##After closing, the corresponding data cannot be accessed at this time

./nginx -s reload can reload the

configuration file after startup Suitable for modifying the configuration file during startup

2. Install Tomcat under Linux (192.168.1.168 and 192.168.1.178 machines)

The installation process is very simple and I won’t go into details. Install Tomcat on the other two Linux machines (192.168.1.168 and 192.168.1.178), and deploy any project nginxTest. One content is 1111... and the other is 22222...

At this time, I am accessing a different IP address, and I have not yet configured Nginx as a reverse proxy server.

3. Nginx serves as a reverse proxy server

Mainly configure the contents of nginx.confa.

Configure server

group, add upstream configuration between http{} nodes.

192.168.1.168:9090 and 192.168.1.178:9191 are Tomcat of the other two Linux machines (see 2 above)

upstream lxstest{

server 192.168.1.168:9090;

server 192.168.1.178:9191;

}

b. Modify the port number 80 that nginx listens to, and change it to 7777 (you can change it to any number or not).

server {

listen 7777;

......

}

c. In location{}, use proxy_pass to configure the reverse proxy address; "http://" cannot be missing here, and the subsequent address must be consistent with the name defined by upstream in the first step. (The above is lxstest, so http://lxstest)

location / {

root html;

index index.html index.htm;

proxy_pass http://lxstest;

}

After the above modifications, start Nginx of 192.168.1.108 machine

Last visit192.168.1.108:7777/nginxTest Different pages appear for the same address, indicating that the one visited is 192.168.1.168, and the one visited192.168 .1.178

##http://192.168.1.108:7777

Equivalent to ====

Equivalent to =====

Finally you will find the corresponding Tomcat

and then find the corresponding one The

nginxTest project.

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