You are moving an existing traditional system to AWS. During migration, you discover that the master server is the single point of failure. Having examined the implementation of the master server you realize that there is not enough time during migration to re-engineer it to be highly available. You also discover that it stores its state in local MySQL database. In order to minimize downtime, you select RDS to replace the local database and configure the master to use it. What steps would best allow you to create a self-healing architecture?
A. Migrate the local database into Multi-AZ database. Place the master node into a multi-AZ auto-scaling group with a minimum of one and maximum of one with health checks.
B. Migrate the local database into Multi-AZ database. Place the master node into a Cross Zone ELB with a minimum of one and maximum of one with health checks
C. Replicate the local database into a RDS Read Replica. Place the master node into a Cross Zone ELB with a minimum of one and maximum of one with health checks
D. Replicate the local database into a RDS Read Replica.Place the master node into a multi-AZ auto-scaling group with a minimum of one and maximum of one with health checks.
