ELB
Public.icon
https://gyazo.com/b937ebe4f347d2566affe88aa771dee0
Distributes the load from network access
In the on-premises era, it was a valuable experience to study because it was an expensive device that cost more than 1 million yen per year. With AWS, you can use it for about 1,900 yen per month (although it may still be more expensive than other services...). Please note that unlike EC2 and RDS, you cannot stop and avoid charges with ELB. There are four types of ELB
Initially, the load distribution destination (= target) was only EC2 instances, but with ALB, it became possible to distribute to Lambda, ECS containers, and other targets. In ALB, it is necessary to set up health checks so that targets that are not normal are not distributed.
In ALB, you can change the distribution destination depending on the contents of HTTP requests (HTTP headers or URL paths), redirect from HTTP to HTTPS, or return a fixed 403 Forbidden or 404 Not Found response. The destination that passes through this is S3 (or so it should be?). There are two types of ELB: one that is publicly available for the Internet and one that can only be used internally in VPC. If you use the certificate of ACM described later, you can easily implement HTTPS communication using your own domain. It is recommended to change the security policy from the default to disable TLS1.0 and 1.1. Related
Summary of how to read academic paper (dissertations) for stray researchers