This is a reminder of the timeline dates shared on March 12, 

In two weeks -April 15- the old cluster will migrate to utilize new replication hosts, at which point replication may stop.

In ~four weeks -April 28- the old hostnames will be redirected to the new cluster.

If you can, please test your code works with the new cluster before the redirects are in place.
For questions and support reach out to #wikimedia-cloud on freenode IRC or email
Joaquin Oltra Hernandez
Developer Advocate - Wikimedia Foundation