[cloud][sdn] LBaaS/neutron / Octavia

清晰/浅显：

http://www.cnblogs.com/sammyliu/p/4656176.html

IBM：写的一般般，价值不大

https://www.ibm.com/developerworks/cn/cloud/library/1506_xiaohh_openstacklb/index.html

Octavia

https://docs.openstack.org/octavia/latest/

LB Network:

https://docs.openstack.org/octavia/latest/contributor/design/version0.5/component-design.html#lb-network

VIP:

https://en.wikipedia.org/wiki/Virtual_IP_address