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Discussion on: How we lost $800/mo with Amazon ECS Fargate

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Ali

I am looking to add VPC endpoints to avoid crazy NAT gateway bandwidth charges.

My understanding is that 'gateway' type of endpoints are free but 'Interface' costs money. ($0.01 per hour + $0.01 per GB at the time of writing)

S3 endpoints can be a 'gateway' type but ECR endpoints need to be 'interface' type.

so... I am not clear on these two things:

(a) Am I right to assume that, since ECR image storage is actually provided by S3, I would just need to have an S3 type of VPC endpoint to avoid these huge NAT gateway bandwidth charges?

OR

(b) Do I need to have ECR and S3 endpoints together and my cost saving is going to be paying $0.01 per GB instead of $0.045 per GB (nat gateway price)?