Chapter 15. High availability: load balancing
So where are we? In the early chapters, we played with the basics: EC2, S3, RDS, IAM, Route 53, CloudWatch, tags, and the AWS CLI. That was great. Then I introduced you to the wonders of elasticity and scalability and touched on making instances more highly available through the use of AWS availability zones.
But to be perfectly honest, nothing discussed so far will make things more highly available—or scalable or elastic, for that matter. Why not? Because you don’t have a high-level administration mechanism to coordinate between your front-line and backup instances. As it stands, even if you did have a running replica of a recently failed instance, how would your website visitors know where to ...
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