[SAM] Review the cost efficiency of the CLB (stupid)

[binchoo]

As-is:

• I'll spend 26% higher than the previous month because the CLB that has replaced the lambda of skill-server costs a lot more than I expected.
• I should've solely benefited from the free-tier capacity of the t2.micro instance.

To-be: In this period of a month, user traffic was sustained meaningfully low and the CLB never created an additional EC2 instance.

• Remove the CLB, and change the beanstalk environment type from LoadBalanced to SingleInstance.
• But improve health metrics monitoring.

[binchoo]

[binchoo]

The day when the CLB was removed.

[binchoo]

What were you doing in July? 🤑

I realized that there had been a running ALB in the Tokyo region, no free-tier. It was somehow eventually removed.

Estimated ELB Cost in July 2022

I'm confident that there had been one additional ALB without any traffic incoming⋯. I lost my money. That being said, I found that https://calculator.aws is very useful and so smart!

I'll find a tool that will force regions beyond the Seoul region not to have ELB instances.

• [x] Can I decrease the Service Quota for ELB? Nope. Only increasing is possible.
• [x] Then, do it via SCP or IAM Permissions.

{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Sid": "Statement1",
      "Effect": "Deny",
      "Action": [
        "elasticloadbalancing:CreateLoadBalancer",
        "elasticloadbalancing:CreateRule",
        "elasticloadbalancing:CreateListener",
        "elasticloadbalancing:CreateTargetGroup"
      ],
      "Resource": [
        "*"
      ],
      "Condition": {
        "StringNotEquals": {
          "aws:RequestedRegion": [
            "ap-northeast-2"
          ]
        }
      }
    }
  ]
}