NGINX Docs | Load Balancing Apache Tomcat Servers with NGINX Open Source and NGINX Plus
https://docs.nginx.com/nginx/deployment-guides/apache-tomcat-load-balancing-nginx-plus/
nginx与tomcat实现session共享负载均衡 | 小蜜蜂
https://www.lmlphp.com/user/56/article/item/2750
apache 2.2 - Session lost in tomcat uing nginx as proxy - Server Fault
https://serverfault.com/questions/619297/session-lost-in-tomcat-uing-nginx-as-proxy
java - Http session couldn't hold in Tomcat and nginx proxypass using Spring mvc - Stack Overflow
https://stackoverflow.com/questions/20623099/http-session-couldnt-hold-in-tomcat-and-nginx-proxypass-using-spring-mvc