Hot-Hot Datacenters with DNS LTM APM SSO
We are getting ready to undertake a major change to our Application Delivery architecture to help improve our DR positioning. Right now we have an HA pair of BIG-IP units running LTM and controlling access to web resources with APM using various WEBSSO methods. We are going to be adding a pair of BIG-IP DNS nodes, one in each of our data centers, as well as another LTM/APM node in our DR data center. We intend to have the LTM/APM pair in our primary site still in a HA failover pair, but the LTM/APM node in our DR site independent.
One of the DR goals from leadership is to actually have applications that support it run in a hot-hot configuration, where traffic would be load-balanced (via BIG-IP DNS) between the main and DR sites.
One question I've been unable to pin down is how that will play with our use of APM. Is there a way to have APM sessions sync between the main site and DR site without the rest of the configuration synching?