好用工具链接收藏（个人书签） Nginx反向代理，负载均衡，redis session共享，keepalived高可用 Keepalived+lvs 搭建高可用负载均衡

https://pdf.yozocloud.cn/index.html#/Pdf2word ：永中PDF工具集  为您提供免费、优质的PDF转换及处理服务

 https://www.cnblogs.com/cjsblog/p/9439331.html ：Elasticsearch

https://www.cnblogs.com/cjsblog/p/9459781.html：Logstash

https://www.cnblogs.com/cjsblog/p/9445792.html：Filebeat

https://cloud.tencent.com/developer/article/1451728：单机搭建hadoop+hive+spark环境

https://www.cnblogs.com/mrlinfeng/p/6146866.html:  Nginx反向代理，负载均衡，redis session共享，keepalived高可用

https://www.cnblogs.com/mrlinfeng/p/6341225.html:   Keepalived+lvs 搭建高可用负载均衡