Nginx does front-end reverse load balancing, backend Httpd+tomcat

Experimental content: Using Nginx to do front-end reverse load balancing backend Httpd+tomcat

Experimental environment: Physical machine Win7, virtual machine centos7;

node1:172.18.11.111 Httpd+tomcat

node2:172.18.11.112 Httpd+tomcat

node3:172.18.11.113 Nginx Reverse Load Balancing

Description: HTTPd has two ways of communicating with Tomcat;

(1) httpd can use the HTTP module to reverse tomcat, when Tomcat uses the HTTP linker;

(2) httpd can also use the AJP module to reverse Tomcat, at which time Tomcat uses the AJP linker;

650) this.width=650; "src=" Http://s1.51cto.com/wyfs02/M01/82/C1/wKiom1df9KKxa2-kAABeLevrCLc804.png "title=" 9.png " alt= "Wkiom1df9kkxa2-kaabelevrclc804.png"/>

On the NODE3:

Installing Nginx

]# yum-y Install nginx-1.8.0-1.el7.ngx.x86_64.rpm

]# vim/etc/nginx/conf.d/default.conf

In the Server configuration section, add:

Location/{

root/usr/share/nginx/html;

Index index.html index.htm;

Proxy_pass Http://websrvs;

}

]# vim/etc/nginx/nginx.conf

In the HTTP configuration section, add:

Upstream Websrvs {

Server 172.18.11.111:80 weight=1;

Server 172.18.11.112:80 weight=2;

}

On Node1 and Node2, respectively: Installing HTTPD and Tomcat

To install the Java Runtime Environment:

]# yum-y Install JAVA-1.7.0-OPENJDK java-1.7.0-openjdk-devel

]# vim/etc/profile.d/java.sh

Export JAVA_HOME=/USR

]# . /etc/profile.d/java.sh

To install Tomcat:

]# Yum install tomcat tomcat-lib Tomcat-webapps Tomcat-admin-webapps

Create an App Store directory in your web working directory;

]# cd/var/lib/tomcat/webapps/

]# mkdir TestApp

]# mkdir classes Lib Web-inf meta-inf

]# vim/var/lib/tomcat/webapps/testapp/index.jsp

650) this.width=650; "src=" Http://s5.51cto.com/wyfs02/M02/82/C2/wKiom1df-g_xtldtAAAuY0ofLk4067.png "title=" 10.png "alt=" Wkiom1df-g_xtldtaaauy0oflk4067.png "/>

]# Vim/etc/tomcat/server.xml

In the Engine configuration section add:

<context path= "/test" docbase= "TestApp"/>

]# systemctl Start Tomcat.service

Copy all the created directory files to Node2, and then make the configuration file changes:

]# Scp-r/var/lib/tomcat/webapps/testapp/node2:/var/lib/tomcat/webapps/

]# Scp/etc/tomcat/server.xml node2:/etc/tomcat/

On the Node2:

]# vim/var/lib/tomcat/webapps/testapp/index.jsp

650) this.width=650; "src=" Http://s5.51cto.com/wyfs02/M01/82/C2/wKiom1df-pCzqMTcAAA2Dt0cSX0340.png "title=" 11.png "alt=" Wkiom1df-pczqmtcaaa2dt0csx0340.png "/>

]# Systemctl Start Tomcat

After installing Tomcat, install httpd on Node1 and Node2 and edit the configuration file:

]# yum-y Install httpd

]# vim/etc/httpd/conf/httpd.conf

#DocumentRoot "/var/www/html"

]# vim/etc/httpd/conf.d/proxy_http_tomcat.conf

650) this.width=650; "src=" Http://s3.51cto.com/wyfs02/M00/82/C2/wKiom1df_k_TDw3HAAAwe0Ppc8k484.png "title=" 12.png "alt=" Wkiom1df_k_tdw3haaawe0ppc8k484.png "/>

Because Node1 and Node2 are all httpd local anti-tomcat, all configuration files are identical;

This time using the Proxy_http_module anti-generation module to communicate with Tomcat based on the HTTP protocol:

]# httpd-m

650) this.width=650; "src=" Http://s4.51cto.com/wyfs02/M02/82/C2/wKiom1dgBJDyEiHfAAAqpC92lOk177.png "title=" 13.png "alt=" Wkiom1dgbjdyeihfaaaqpc92lok177.png "/>

]# systemctl Start httpd

Browser test, input http://172.18.11.113/testapp/index.jsp

After multiple refreshes, the load balance is achieved and the ratio is 1:2, and the front-end nginx back-end Tomcat is implemented.

650) this.width=650; "src=" Http://s4.51cto.com/wyfs02/M01/82/C2/wKiom1dgBSuDKcpIAAA6rbXUPak762.png "style=" float: none; "title=" 14.png "alt=" Wkiom1dgbsudkcpiaaa6rbxupak762.png "/>

650) this.width=650; "src=" Http://s5.51cto.com/wyfs02/M02/82/C0/wKioL1dgBj7TynFsAAA1SMVh4_Q294.png "style=" float: none; "title=" 15.png "alt=" Wkiol1dgbj7tynfsaaa1smvh4_q294.png "/>

If you want to do the session stickiness, you can add an instruction to the upstream configuration segment on Nginx:

Upstream Websrvs {

Server 172.18.11.111:80 weight=1;

Server 172.18.11.112:80 weight=2;

Ip_hash;

}

Description: Ip_hash is session-bound based on the source IP.

Browser test, input http://172.18.11.113/testapp/index.jsp

After multiple refreshes, it is bound to a source IP.

HTTPD can also use the AJP protocol to reverse Tomcat, the benefit of which is to prevent users from using the cross-httpd to access Tomcat, because if the HTTP protocol is used, it is possible for the user to directly access the back-end tomcat across the httpd.

Its configuration is also very simple, according to the above configuration slightly modified can:

Just modify the configuration files on the Node1 and Node2:

]# vim/etc/httpd/conf.d/proxy_http_tomcat.conf

650) this.width=650; "src=" Http://s4.51cto.com/wyfs02/M01/82/C0/wKioL1dgCRyjTb_HAABR88kO03M525.png "title=" 16.png "alt=" Wkiol1dgcryjtb_haabr88ko03m525.png "/>

Everything else is the same.

To view httpd loaded modules:

650) this.width=650; "src=" Http://s4.51cto.com/wyfs02/M01/82/C2/wKiom1dgCGDwRIFBAAAqqv2jOws219.png "title=" 17.png "alt=" Wkiom1dgcgdwrifbaaaqqv2jows219.png "/>

The above process is a simple implementation of nginx as a reverse load balancing to the back-end Tomcat server configuration experiment.

Nginx does front-end reverse load balancing, backend Httpd+tomcat