# Comment center console [root @ nginx ~] # vim / etc / httpd / conf / the httpd.conf #DocumentRoot " / var / the WWW / HTML " #: Configuring virtual hosts [root @ nginx ~] # vim / etc / httpd / conf.d / tomcat.conf <VirtualHost *: 80 > ServerName node1.magedu.com ProxyRequests Off ProxyVia the On ProxyPreserveHost the On ProxyPass / Balancer: // lbtomcats / ProxyPassReverse / Balancer: // lbtomcats / </ VirtualHost> <Proxy Balancer: / / lbtomcats> BalancerMember HTTP: //node1.magedu.com:8080 loadfactor=1 BalancerMember http://node2.magedu.com:8080 loadfactor=2 </Proxy> #：分别配置tomcat [root@node1 ~]# vim /usr/local/tomcat/conf/server.xml <Engine name="Catalina" defaultHost="node1.magedu.com" jvmRoute="Tomcat1"> [root@node2 ~]# vim /usr/local/tomcat/conf/server.xml <Engine name="Catalina" defaultHost="node2.magedu.com" jvmRoute="Tomcat2"> # Observation is polled
#：使用session粘性 [root@nginx ~]# vim /etc/httpd/conf.d/tomcat.conf Header add Set-Cookie "ROUTEID=.%{BALANCER_WORKER_ROUTE}e; path=/" env=BALANCER_ROUTE_CHANGED <VirtualHost *:80> ServerName node1.magedu.com ProxyRequests Off ProxyVia On ProxyPreserveHost On ProxyPass / balancer://lbtomcats/ ProxyPassReverse / balancer://lbtomcats/ </VirtualHost> <Proxy balancer://lbtomcats> BalancerMember http://loadFactor = 1 route = node1.magedu.com:8080 tomcat1 BalancerMember HTTP: // node2.magedu.com:8080 loadFactor = 2 route = tomcat2 ProxySet stickysession = the routeID </ Proxy>
#
find Session unchanged, and has been looking for the same a Tomcat server
#：api [root@nginx ~]# vim /etc/httpd/conf.d/tomcat.conf <VirtualHost *:80> ServerName node1.magedu.com ProxyRequests Off ProxyVia On ProxyPreserveHost On ProxyPass / balancer://lbtomcats/ ProxyPassReverse / balancer://lbtomcats/ </VirtualHost> <Proxy balancer://lbtomcats> BalancerMember ajp://node1.magedu.com:8009 loadfactor=1 route=Tomcat1 BalancerMember ajp://node2.magedu.com:8009 loadfactor=2 route=Tomcat2 ProxySet stickysession=ROUTEID </Proxy>
Although the above approach to achieve the client to find the same period of time Tomcat , so as to avoid after switching caused Session loss. but if
Tomcat node hang up, then the Session is still missing.
Suppose A , B two nodes are Session persistence. If Tomcat A user offline during a service switching to Tomcat B , the gained the Tomcat B 's Session , even if persistence Session of Tomcat A on the line, is useless.