Build Tomcat9 cluster through Nginx and realize session sharing

Use Nginx to build Tomcat9 cluster and Redis to realize session sharing

1. Tomcat preparation

First prepare two tomcat9 and modify the configuration file server.xml

This problem does not exist if you start Tomcat on multiple servers separately.

2. Implement Nginx cluster

Modify the nginx.conf configuration file to implement clustering

3.Redis implements session sharing

Add the following three jar packages in the tomcat/lib directory

Then change the tomcat context.xml file

Then start the redis service first, and then start the tomcat and nginx services.

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