Tomcat Cluster负载均衡

2023-07-22 08:09:10

author：JevonWei

版权声明：原创作品

Tomcat Cluster负载均衡

环境

tomcatA    172.16.253.108

tomcatB    172.16.253.105

代理服务器 172.16.253.191

Tomcat集群

Tomcat A

[root@tomcatA ~]#  yum -y install java-1.8.0-openjdk*

[root@tomcatA ~]# yum -y install tomcat-lib tomcat tomcat-webapps tomcat-docs-webapp tomcat-admin-webapps

[root@tomcatA ~]# iptables -F

[root@tomcatA ~]# setenforce 0

[root@tomcatA ~]# mkdir -pv /data/webapps/ROOT/{classes,lib,WEB-INF}

[root@tomcatA ~]# vim /etc/tomcat/server.xml

    <Engine name="Catalina" defaultHost="www.jevon1.com"> \\修改默认主机为www.jevon1.com

    <Host name="www.jevon1.com" appBase="/data/webapps" unpackWARs="true" autoDeploy="true" >

        <Valve className="org.apache.catalina.valves.AccessLogValve" directory="logs"

            prefix="jevon_access_log" suffix=".log"

            pattern="%h %l %u %t &quot;%r&quot; %s %b" />

    </Host>

[root@tomcatA ~]# vim /data/webapps/ROOT/index.jsp

    <%@ page language="java" %>

    <html>

        <head><title>TomcatA</title></head>

        <body>

            <h1><font color="red">TomcatA.magedu.com</font></h1>

            <table align="centre" border="1">

                <tr>

                    <td>Session ID</td>

                <% session.setAttribute("magedu.com","magedu.com"); %>

                    <td><%= session.getId() %></td>

                </tr>

                <tr>

                    <td>Created on</td>

                    <td><%= session.getCreationTime() %></td>

                </tr>

            </table>

        </body>

    </html>

[root@tomcatA ~]# systemctl start tomcat

[root@tomcatA ~]# ss -ntl

Tomcat B

[root@tomcatB ~]#  yum -y install java-1.8.0-openjdk*

[root@tomcatB ~]# yum -y install tomcat-lib tomcat tomcat-webapps tomcat-docs-webapp tomcat-admin-webapps

[root@TomcatB ~]# iptables -F

[root@TomcatB ~]# setenforce 0

[root@tomcatB ~]# mkdir -pv /data/webapps/ROOT/{classes,lib,WEB-INF}

[root@tomcatB ~]# vim /etc/tomcat/server.xml

    <Engine name="Catalina" defaultHost="www.jevon2.com"> \\修改默认主机为www.jevon21.com

    <Host name="www.jevon2.com" appBase="/data/webapps" unpackWARs="true" autoDeploy="true" >

        <Valve className="org.apache.catalina.valves.AccessLogValve" directory="logs"

            prefix="jevon_access_log" suffix=".log"

            pattern="%h %l %u %t &quot;%r&quot; %s %b" />

    </Host>

[root@TomcatB ~]# vim /data/webapps/ROOT/index.jsp

    <%@ page language="java" %>

    <html>

        <head><title>TomcatB</title></head>

        <body>

            <h1><font color="blue">TomcatB.magedu.com</font></h1>

            <table align="centre" border="1">

                <tr>

                    <td>Session ID</td>

                <% session.setAttribute("magedu.com","magedu.com"); %>

                    <td><%= session.getId() %></td>

                </tr>

                <tr>

                    <td>Created on</td>

                    <td><%= session.getCreationTime() %></td>

                </tr>

            </table>

        </body>

    </html>

[root@tomcatB ~]# systemctl start tomcat

[root@tomcatB ~]# ss -ntl

Nginx代理

代理服务器

[root@danran ~]# vim /etc/hosts

    172.16.253.108 www.jevon1.com

    172.16.253.105 www.jevon2.com

[root@danran ~]# yum -y install nginx

[root@danran ~]# vim /etc/nginx/nginx.conf

    http {

        upstream appsrvs {

            server www.jevon1.com:8080;

            server www.jevon2.com:8080;

        }

    }

    server {

        listen 80;

        server_name www.danran.com;

        index index.jsp index.html;

        root /usr/share/nginx/html;

        location / {

            proxy_pass http://appsrvs/;

        }

    }

[root@danran ~]# nginx -t

[root@danran ~]# nginx start nginx

client

elinks www.danran.com

elinks www.danran.com

Haproxy代理

代理服务器

[root@danran ~]# vim /etc/hosts

    172.16.253.108 www.jevon1.com

    172.16.253.105 www.jevon2.com

[root@httpd ~]# yum -y install haproxy

[root@httpd ~]# vim /etc/haproxy/haproxy.cfg

    frontend tomcat

        bind *:80

        default_backend appsrvs

    backend appsrvs

        balance roundrobin

        server app1 www.jevon1.com:8080 check

        server app2 www.jevon2.com:8080 check

    listen stats

        bind *:9009

        stats enable

[root@httpd ~]# systemctl start haproxy

[root@httpd ~]# ss -ntl

client

elinks www.danran.com

elinks www.danran.com

http://www.danran.com:9009/haproxy?stats

Htppd代理

代理服务器

[root@httpd ~]# yum -y install httpd

[root@httpd ~]# httpd -M \\确保以下三个模块

proxy_balancer_module (shared)

proxy_module (shared)

proxy_http_module (shared)

或

proxy_ajp_module (shared)  

[root@httpd ~]# vim /etc/httpd/conf.d/tomcat-http.conf

    <proxy balancer://appsrvs>  \\定义balancer集群组

        BalancerMember http://www.jevon1.com:8080

        BalancerMember http://www.jevon2.com:8080

        ProxySet lbmethod=byrequests \\调度算法byrequests为轮询；bybusyness根据繁忙程度调度，相当于least-connest;bytraffic根据流量调度

    </Proxy>

    <VirtualHost *:80>

        ServerName www.danran.com

        ProxyVia On

        ProxyRequests Off

        ProxyPreserveHost On

        <Proxy *>

            Require all granted

        </Proxy>

        ProxyPass / balancer://appsrvs/

        ProxyPassReverse / balancer://appsrvs/

        <Location />

            Require all granted

        </Location>

    </VirtualHost>

[root@httpd ~]# httpd -t

[root@httpd ~]# systemctl start httpd

client

elinks www.danran.com

elinks www.danran.com

httpd的AJP协议代理

代理服务器

[root@httpd ~]# vim /etc/httpd/conf.d/tomcat-ajp.conf

    <proxy balancer://appsrvs> \\定义balancer集群组

        BalancerMember ajp://www.jevon1.com:8009 \\tomcat服务的8080端口不支持ajp协议，8009端口支持aip协议

        BalancerMember ajp://www.jevon2.com:8009

        ProxySet lbmethod=byrequests \\调度算法byrequests为轮询；bybusyness根据繁忙程度调度，相当于least-connest;bytraffic根据流量调度

    </Proxy>

    <VirtualHost *:80>

        ServerName www.danran.com

        ProxyVia On

        ProxyRequests Off

        ProxyPreserveHost On

        <Proxy *>

            Require all granted

        </Proxy>

        ProxyPass / balancer://appsrvs/

        ProxyPassReverse / balancer://appsrvs/

        <Location />

            Require all granted

        </Location>

    </VirtualHost>

[root@httpd ~]# httpd -t

[root@httpd ~]# systemctl start httpd

client

elinks www.danran.com

elinks www.danran.com

实现Tomcat集群的session粘性

Tomcat A

[root@danran ~]# vim /etc/httpd/conf.d/tomcat-ajp.conf

    Header add Set-Cookie "ROUTEID=.%{BALANCER_WORKER_ROUTE}e; path=/" env=BALANCER_ROUTE_CHANGED

    <proxy balancer://appsrvs>

        BalancerMember ajp://www.jevon1.com:8009 route=tcA \\route=tcA为cookie标识，tcA为自定义信息

        BalancerMember ajp://www.jevon2.com:8009 route=tcB

        ProxySet lbmethod=byrequests

        ProxySet stickysession=ROUTEID  \\ROUTEID同header上设置的Sookie信息一致；

    </Proxy>

    <VirtualHost *:80>

        ServerName www.danran.com

        ProxyVia On

        ProxyRequests Off

        ProxyPreserveHost On

        <Proxy *>

            Require all granted

        </Proxy>

        ProxyPass / balancer://appsrvs/

        ProxyPassReverse / balancer://appsrvs/

        <Location />

            Require all granted

        </Location>

    </VirtualHost>

    balancer的状态界面

    <Location /balancer-manager>  管理接口的状态界面的自定义URL

        SetHandler balancer-manager 启用的内部处理器为balancer-manager，固定的

        ProxyPass !   \\不反代

        Require all granted \\运行某

    </Location>

[root@danran ~]# httpd -t

[root@danran ~]# systemctl restart httpd

client访问www.danran.com实现会话粘性

[root@danran ~]# curl -I www.danran.com

HTTP/1.1 200 OK

Date: Sun, 03 Sep 2017 00:47:42 GMT

Server: Apache/2.4.6 (Red Hat Enterprise Linux) PHP/5.4.16

Set-Cookie: JSESSIONID=F36265B9FF2CC34C7203E41372FE4A0A; Path=/; HttpOnly

Content-Type: text/html;charset=ISO-8859-1

Content-Length: 416

Set-Cookie: ROUTEID=.tcA; path=/

client显示balancer状态界面

http://www.danran.com/balancer-manager

码农公寓

Tomcat Cluster负载均衡

Tomcat集群

Nginx代理

Haproxy代理

Htppd代理

httpd的AJP协议代理

实现Tomcat集群的session粘性

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