A. Turn off the source/destination check on each bare metal instance.
B. Modify the security groups to ensure that the minimal ports for connectivity between the application server and the database are opened.
C. Add a route table entry to the route tables for the subnets of both bare metal instances for the overlay IP address.
D. Ensure that both bare metal instances are in the same subnet.
E. Perform a failover and tailback by using the Pacemaker cluster. Check whether the overlay IP address routing is functioning correctly.
F. Move the Pacemaker cluster to EC2 VM instances instead of bare metal instances.
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