Using zonal shift with Amazon EC2 Auto Scaling
Compute Blog
This blog post discusses using zonal shift with Amazon EC2 Auto Scaling to rapidly recover from single Availability Zone (AZ) impairments affecting your Auto Scaling Group resources.
Specifically, the article covers:
- Overview of zonal shift and its benefits for multi-AZ resilience
- How to use zonal shift with a standalone Auto Scaling Group architecture
- How to use zonal shift with an Auto Scaling Group integrated with an Elastic Load Balancer
- Considerations for the ImpairedZoneHealthCheckBehavior parameter (IgnoreUnhealthy vs ReplaceUnhealthy)
- Best practices for using zonal shift effectively, including pre-scaling for AZ capacity loss, enabling cross-zone load balancing, and using zonal autoshift
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