Openstack Private Floating IP

asked 2016-05-11 19:56:22 -0500

smjain gravatar image

updated 2016-05-11 22:44:43 -0500

Was wondering how about a Private Floating IP which is on same lines as the public ones but can be provisioned from a tenant specific network which can be used to route traffic to the actual DB instances within a private network.Since we dont want to expose a DB over a public accessible IP can we have a private floating IP to have an IP failover mechanism. So basically question is that can we seperate the nature of Floating from the actual network from which its derived.

The concept is similar in the sense of having an FIP namespace having an interface which has an IP in that Private FIP network. This FIP namespace also makes gratuitious ARP for the actually FIP on its port. This means any VM which can connect to the Private FIP network can technically reach the VM with the FIP.

We can then float this IP around via the IP Tables similar to what is being done.

This allows flexibility in terms of extending the notion of floating IPs from not just be accessible from a public network but can also be accessed from within the openstack landscape.

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