EC2 Auto Scaling now supports Amazon Application Recovery Controller (ARC) zonal shift and zonal autoshift to help you quickly recover an impaired application from failures in an Availability Zone (AZ). Starting today, you can shift the launches of EC2 instances in an Auto Scaling Group (ASG) away from an impaired AZ to quickly recover your unhealthy application in another AZ, reducing the duration and severity of impact due to events such as power outages and hardware, or software failures. This new integration also brings support for ARC zonal autoshift, which automatically starts a zonal shift for enabled ASGs when AWS identifies a potential failure affecting an AZ.
You can initiate a zonal shift for an ASG from the Amazon EC2 Auto Scaling or Application Recovery Controller console. You can also use the AWS SDK to start a zonal shift and programmatically shift the instances in your ASG away from an AZ, and shift it back once the affected AZ is healthy.
There is no additional charge for using zonal shift. Zonal shift is now available in all AWS Regions. To get started, read the launch blog, or refer to the documentation.
Source:: Amazon AWS