A Disaster Recovery (DR) plan defines the following:
- AWS account: Your account in AWS that acts as a secondary site for Phoenix DRaaS. The account maintains the AMI for the virtual machines. At the time of disaster, you can launch EC2 instance from these AMI, in-turn spinning up to production in minutes.
- AWS region: The storage region where you want to create AMIs for your virtual machines. The region of the DR plan and region of the storage to which the virtual machine is backing the data to must be same.
- AMI update frequency: The frequency at which the AMI is updated. Based on the defined frequency, on each schedule, the existing AMI, if present, is replaced with an AMI based on the latest restore point available for the virtual machine.
In other words, the DR plan encompasses the virtual machines configured for disaster recovery, the AWS account used for disaster recovery, the AMI update frequency, and the network, security and instance-related failover settings such as VPC, subnet, IP addresses, security group, and instance type. Preconfiguration of these settings in the DR plan allows for a single-click failover in the event of a disaster. On failover, based on the latest AMI and failover settings, an EC2 instance is launched in your AWS account.