Description of problem: Add support for the OSE DNS plugin to update more than 1 DNS server (at a time). In a Master -> (Slave NS1 <--> Slave NS2) DNS setup, if the master is ever goes down so does your ability to create applications or scale applications. Version-Release number of selected component (if applicable): 2.2.7 and prior. How reproducible: 100% Steps to Reproduce: 1. Setup OSE 2. Setup Bind with 1 master, and 1 slave 3. Configure Broker and Nodes to use Slave an DNS (resolve resource). - Configure the Broker to update the DNS master (in DNS plugin). 4. Stop the Master 5. Create an application OR Scale and application Actual results: DNS failures will be seen and applications are rolled back. Expected results: The DNS plugin should (quickly) identify failures with the first DNS (master) and update a second, to avoid this type of outage. Additional info: