How can you failover gracefully in AWS?

We can use Elastic IPs to implement failover in AWS. Elastic IP is a static IP and it is dynamically re-mappable. In case there is a failure at one node, we can quickly remap and failover to another set of servers. It will lead to routing of traffic to the new servers.

It is also useful when we upgrade from old to new versions or when some piece of hardware fails.

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