设备
系统 IP 主机名 软件 服务
centos7 10.0.0.17 web1.lyj.com JDK8、tomcat tomcat1
centos7 10.0.0.37 web2.lyj.com JDK8、tomcat tomcat2
centos7 10.0.0.27 proxy.lyj.com nginx 调度器
centos7 10.0.0.7 客户端
负载均衡tomcat主机准备
web1虚拟主机配置
[root@web1 ~]#vim /usr/local/tomcat/conf/server.xml
<Host name="localhost" appBase="webapps"
unpackWARs="true" autoDeploy="true">
<!-- SingleSignOn valve, share authentication between web applications
Documentation at: /docs/config/valve.html -->
<!--
<Valve className="org.apache.catalina.authenticator.SingleSignOn" />
-->
<!-- Access log processes all example.
Documentation at: /docs/config/valve.html
Note: The pattern used is equivalent to using pattern="common" -->
<Valve className="org.apache.catalina.valves.AccessLogValve" directory="logs"
prefix="localhost_access_log" suffix=".txt"
pattern="%h %l %u %t "%r" %s %b" />
</Host>
</Engine>
<Engine name="Catalina" defaultHost="web1.lyj.com"> #添加web1 引擎 ，必须添加引擎，才能实现负载均衡调度，否则默认访问localhost引擎，访问tomcat/webapps/ROOT/index.jsp,默认页面
<Host name="web1.lyj.com" appBase="/data/webapps" #添加web1 虚拟主机
unpackWARs="true" autoDeploy="true">
</Host>
</Engine>
web2虚拟主机配置
[root@web2 ~]#vim /usr/local/tomcat/conf/server.xml
<Host name="localhost" appBase="webapps"
unpackWARs="true" autoDeploy="true">
<!-- SingleSignOn valve, share authentication between web applications
Documentation at: /docs/config/valve.html -->
<!--
<Valve className="org.apache.catalina.authenticator.SingleSignOn" />
-->
<!-- Access log processes all example.
Documentation at: /docs/config/valve.html
Note: The pattern used is equivalent to using pattern="common" -->
<Valve className="org.apache.catalina.valves.AccessLogValve" directory="logs"
prefix="localhost_access_log" suffix=".txt"
pattern="%h %l %u %t "%r" %s %b" />
</Host>
</Engine>
<Engine name="Catalina" defaultHost="web2.lyj.com">
<Host name="web2.lyj.com" appBase="/data/webapps"
unpackWARs="true" autoDeploy="true">
</Host>
</Engine>
准备负载均衡测试用jsp文件
web1和web2节点创建相同的文件
mkdir -pv /data/webapps/ROOT
jsp文件内容
[root@web1 ~]#vim /data/webapps/ROOT/index.jsp <%@ page import="java.util.*" %> <!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>tomcat test</title> </head> <body> <div>On <%=request.getServerName() %></div> <div><%=request.getLocalAddr() + ":" + request.getLocalPort() %></div> <div>SessionID = <span style="color:blue"><%=session.getId() %></span></div> <%=new Date()%> </body> </html>
启动tomcat服务或重启
[root@web2 ~]#systemctl start tomcat #启动
或 [root@web2 ~]#systemctl restart tomcat #重启
nginx实现后端tomcat的负载均衡调度
子配置文件 tomcat 专用 tomcat.conf
[root@proxy ~]#vim /usr/local/nginx/conf/conf.d/tomcat.conf
upstream tomcat-server {
server web1.lyj.com:8080;
server web2.lyj.com:8080;
}
server {
listen 80;
server_name proxy.lyj.com;
root /usr/local/nginx/html;
location ~* /.(jsp|do)$ {
proxy_pass http://tomcat-server;
}
}
域名解析，用hosts文件做域名解析
nginx服务器
[root@proxy ~]#vim /etc/hosts #添加以下内容 10.0.0.17 web1.lyj.com 10.0.0.37 web2.lyj.com
客户端
[root@centos7-liyj ~]#vim /etc/hosts 10.0.0.27 prxoy.lyj.com
页面测试
[root@centos7-liyj ~]#curl http://proxy.lyj.com/index.jsp <!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>web2 tomcat test</title> </head> <body> <div>On tomcat-server</div> <div>10.0.0.37:8080</div> <div>SessionID = <span style="color:blue">6E153FEB589D130E91A66B340FCC4EB4</span></div> Sun Jun 19 19:04:17 CST 2022 </body> </html> [root@centos7-liyj ~]#curl http://proxy.lyj.com/index.jsp <!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>web1 tomcat test</title> </head> <body> <div>On tomcat-server</div> <div>10.0.0.17:8080</div> <div>SessionID = <span style="color:blue">6FFF0F78783A4C0EC6C4D3CD8C09A38C</span></div> Sun Jun 19 19:04:20 CST 2022 </body> </html> [root@centos7-liyj ~]#curl http://proxy.lyj.com/index.jsp <!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>web2 tomcat test</title> </head> <body> <div>On tomcat-server</div> <div>10.0.0.37:8080</div> <div>SessionID = <span style="color:blue">6EDBE50ACF1E8FA28310148B1A4DA4EA</span></div> Sun Jun 19 19:04:30 CST 2022 </body> </html> [root@centos7-liyj ~]#curl http://proxy.lyj.com/index.jsp <!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>web1 tomcat test</title> </head> <body> <div>On tomcat-server</div> <div>10.0.0.17:8080</div> <div>SessionID = <span style="color:blue">62C1B0BCAFE584F590DBC38DBD32FAAA</span></div> Sun Jun 19 19:04:34 CST 2022 </body> </html>
实现session 黏性
在upstream中使用ip_hash指令，使用客户端i地址hash。
upstream tomcat-server {
ip_hash; #添加IP地址hash算法
server web1.lyj.com:8080;
server web2.lyj.com:8080;
}
server {
listen 80;
server_name proxy.lyj.com;
root /usr/local/nginx/html;
location ~* /.(jsp|do)$ {
proxy_pass http://tomcat-server;
}
}
10.0.0.7 客户端 测试
[root@centos7-liyj ~]#curl http://proxy.lyj.com/index.jsp <!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>web2 tomcat test</title> </head> <body> <div>On tomcat-server</div> <div>10.0.0.37:8080</div> <div>SessionID = <span style="color:blue">FDB1EF9B00A712483A6BFDA7C59CC99D</span></div> Sun Jun 19 19:22:16 CST 2022 </body> </html> [root@centos7-liyj ~]#curl http://proxy.lyj.com/index.jsp <!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>web2 tomcat test</title> </head> <body> <div>On tomcat-server</div> <div>10.0.0.37:8080</div> <div>SessionID = <span style="color:blue">DD60C243CF148A059CC8EE770A446088</span></div> Sun Jun 19 19:22:18 CST 2022 </body> </html> [root@centos7-liyj ~]#curl http://proxy.lyj.com/index.jsp <!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>web2 tomcat test</title> </head> <body> <div>On tomcat-server</div> <div>10.0.0.37:8080</div> <div>SessionID = <span style="color:blue">CCCE7493697E7A70D8AD8CF5D38D1822</span></div> Sun Jun 19 19:22:20 CST 2022 </body> </html>
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