Disaster Recovery: How does DNS failover work for AWS Disaster Recovery?
Hi re:Post,
I am not a network/domain admin but have some general questions regarding DR with an AWS framework.
Suppose the servers in our Ohio region go down.
We recreate all servers via snapshots in Oregon region.
How does the DNS load balancer 'know' about the new servers in Oregon region?
How does DNS failover work in this situation?
I've read this article: https://docs.aws.amazon.com/prescriptive-guidance/latest/strategy-database-disaster-recovery/defining.html
but I think it's just the tip of the iceberg so to speak, can you suggest other articles as well ?
Thank you for your time and help!
Best Regards,
Donald
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You will have a new load balancer in the new region.
Load balancers are regional.
You need to update the DNS records to point to the new load balancer.
Alternatively you could use global accelerator which points to your primary and secondary load balancer. This way you never need to update DNS. Failover would be built in
Another option is Route53 health check https://docs.aws.amazon.com/Route53/latest/DeveloperGuide/dns-failover.html
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Thank you Gary and Steve for your answers, link, and review of my questions! Best Regards, Donald