https://blog.csdn.net/dear_snowing/article/details/68066544
https://www.cnblogs.com/liuyisai/p/5990645.html
https://blog.csdn.net/guoxiaojie_415/article/details/38640525
https://blog.csdn.net/huoyuanshen/article/details/68483188
https://blog.csdn.net/kongxx/article/details/73173762
原 linux添加虚拟ip（手动vip和keepalived方式）
原文：https://www.cnblogs.com/diyunpeng/p/9126933.html