amazon web services - Moving EC2 Instances from one region to another -


i trying migrate ec2 instances 1 region another. when ec2 goes down in region a, how start in region b? having hard time trying figure out do. know how copy ec2 instances within availability zones within 1 region seeing lot of articles:

https://media.amazonwebservices.com/aws_migrate_resources_to_new_region.pdf http://www.serverwatch.com/server-tutorials/moving-ec2-instances-across-availability-zones-or-aws-regions.html

stating need use third party scripts in order accomplish this. have experience moving ec2 instances on region another?

there's no need copy images 1 region purposes of redundancy. each region has multiple availability zones, , meant provide full fault tolerance within given region. each availability zone within region physically distinct datacenter, , depending on region there may upwards of 3 5 availability zones. chances of 3 or more availability zones in 1 region suffering outages simultaneously pretty small.

depending on complexity of application fault tolerance deploying multiple ec2 instances across multiple availability zones within same region , putting elastic load balancer (elb) in front of application.

another approach fault tolerance make use of auto scaling, not ensures minimum number of ec2 instances running application, more instances can launched automatically if load on application increases. auto scaling can deployed across availability zones within single reason ensure fault tolerance. @ simplest level, if create auto scaling group both minimum , maximum of 1 ec2 instance aws ensure application running, , if ec2 instance fails reason launch new instance replace it.

if decide need copy instance 1 region region require multiple steps. can't copy instance 1 region another, need create amazon machine image (ami) of ec2 instance you're interested in, transfer ami new region, launch new ec2 instances based on ami. used necessary use third party tools this, amazon offers ability directly. see this documentation on copying ami's on how this.


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