Robuta

https://www.openldap.org/lists/openldap-software/200707/msg00430.html
failoverconfigserversdnsaddress
https://www.scaleway.com/en/docs/dedibox-ip-failover/how-to/configure-reverse-dns/
This page explains how to configure the reverse DNS for a Dedibox failover IP in the Scaleway Dedibox console.
reverse dnsconfigurefailover
https://aws.amazon.com/blogs/apn/reviewing-dns-mechanisms-for-routing-traffic-and-enabling-failover-for-aws-privatelink-deployments/
Customers looking to consume AWS PrivateLink-enabled services from service providers need a mechanism to route traffic from their VPCs and on-premises networks...
reviewingdnsmechanismsroutingtraffic
https://www.dynu.com/Forum/ViewTopic/Monitoring-and-DNS-Failover-released/3824
dns failovercommunity forumuser groupmonitoringreleased