httpd+tomcat cluster
httpd(proxy_http_module)+tomcat cluster,httpd(proxy_ajp_module)+tomcat cluster；
httpd(proxy_http_module)+tomcat cluster,
配置Tomcat集群
在Tomcat服务器上分别创建index.jsp作为负载均衡的页面；
~]# mkdir /var/lib/tomcat/webapps/test/{classes,lib,WEB-INF} -pv
~]# cp /webapps/ROOT/index.jsp /var/lib/tomcat/webapps/test/
安装置httpd代理服务
~]# yum -y install httpd
安装完成后需要确保安装proxy_balancer_module (shared)
配置httpd服务器
~]# cd /etc/httpd/conf.d/
]# vim tomcat.conf
<Proxy balancer://tomcat>
BalancerMemberhttp://172.16.100.7:8080 loadfactor=1
BalancerMemberhttp://172.16.100.8:8080 loadfactor=1
ProxySetlbmethod=byrequests
</Proxy>
ProxyVia Off
ProxyRequests Off
ProxyPass / balancer://tomcat/ProxyPassReverse / balancer://tomcat/<Proxy *>
Order Allow,Deny
Allow From all
</Proxy>
<Location />
Order Allow,Deny
Allow From all
</Location>
测试：
image image
依据测试，可正常使用httpd proxy_httpd_module进行负载；
会话粘性的实现方法：
对Tomcat主机的配置分别进行标识；
172.16.80.7
image
172.16.80.8
image
对httpd进行配置
配置其/etc/httpd/conf.d/tomcat.conf
第一行用于设定表明用户访问时是需要cookie；
Header add :添加header 首部
Set-Cookie :设置Cookie
route=TomcatA :于172.16.80.7中的JvmRoute保持一致
route=TomcatB :于172.16.80.8中的JvmRoute保持一致 ProxySet stickysession=ROUTEID中的ROUTEID和Set-cookie的值保持一致；
Header add Set-Cookie "ROUTEID=.%{BALANCER_WORKER_ROUTE}e; path=/" env=BALANCER_ROUTE_CHANGED <proxy balancer://tcsrvs>
BalancerMember http://172.18.100.67:8080 route=TomcatA loadfactor=1
BalancerMember http://172.18.100.68:8080 route=TomcatB loadfactor=2
ProxySet lbmethod=byrequests
ProxySet stickysession=ROUTEID </Proxy>
<VirtualHost *:80>
ServerName lb.magedu.com
ProxyVia On
ProxyRequests Off
ProxyPreserveHost On
<Proxy *>
Require all granted
</Proxy>
ProxyPass / balancer://tcsrvs/
ProxyPassReverse / balancer://tcsrvs/
<Location />
Require all granted
</Location>
</VirtualHost>
管理接口，新建一个balancer-manager.conf;
<Location /balancer-manager>
SetHandler balancer-manager
ProxyPass !
Require all granted
</Location>
测试
在访问172.16.80.6/test/时将一直是TomcatB;
image
在stop掉TomcatB的tomcat服务后访问才变为TomcatA;
image
balancer-manager管理 image
httpd(proxy_ajp_module)+tomcat cluster；
将http更改为ajp，并将端口更改为8009； <proxy balancer://tcsrvs> BalancerMember ajp://172.18.100.67:8009 BalancerMember ajp://172.18.100.68:8009 ProxySet lbmethod=byrequests </Proxy>
<VirtualHost *:80>
ServerName lb.magedu.com
ProxyVia On
ProxyRequests Off
ProxyPreserveHost On
<Proxy *>
Require all granted
</Proxy>
ProxyPass / balancer://tcsrvs/
ProxyPassReverse / balancer://tcsrvs/
<Location />
Require all granted
</Location>
<Location /balancer-manager>
SetHandler balancer-manager
ProxyPass !
Require all granted
</Location>
</VirtualHost>
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