chore(aws): dump acquired knowledge

knowledge base/cloud computing/aws/README.md

@@ -1003,6 +1003,7 @@ If one can, prefer just build the image from an EC2 instance.
 [i'm trying to export a snapshot from amazon rds mysql to amazon s3, but i'm receiving an error. why is this happening?]: https://repost.aws/knowledge-center/rds-mysql-export-snapshot
 [more info about resource deprecation?]: https://github.com/boto/boto3/discussions/3563
 [nat gateways]: https://docs.aws.amazon.com/vpc/latest/userguide/vpc-nat-gateway.html
+[Pulling the Amazon Linux container image]: https://docs.aws.amazon.com/AmazonECR/latest/userguide/amazon_linux_container_image.html
 [rotating aws kms keys]: https://docs.aws.amazon.com/kms/latest/developerguide/rotate-keys.html
 [savings plans user guide]: https://docs.aws.amazon.com/savingsplans/latest/userguide/
 [Services that support the Resource Groups Tagging API]: https://docs.aws.amazon.com/resourcegroupstagging/latest/APIReference/supported-services.html
@@ -1018,7 +1019,6 @@ If one can, prefer just build the image from an EC2 instance.
 [what is amazon vpc?]: https://docs.aws.amazon.com/vpc/latest/userguide/what-is-amazon-vpc.html
 [what is aws config?]: https://docs.aws.amazon.com/config/latest/developerguide/WhatIsConfig.html
 [what is aws global accelerator?]: https://docs.aws.amazon.com/global-accelerator/latest/dg/what-is-global-accelerator.html
-[Pulling the Amazon Linux container image]: https://docs.aws.amazon.com/AmazonECR/latest/userguide/amazon_linux_container_image.html
 
 <!-- Others -->
 [a guide to tagging resources in aws]: https://medium.com/@staxmarketing/a-guide-to-tagging-resources-in-aws-8f4311afeb46

knowledge base/cloud computing/aws/ecr.md

@@ -25,6 +25,14 @@ aws ecr delete-repository --repository-name 'banana/slug'
 aws ecr list-images --repository-name 'repository'
 aws ecr list-images --registry-id '123456789012' --repository-name 'my-image'
 
+# Check images exist in the ECR.
+[[ \
+  $(
+    aws ecr list-images --repository-name 'repository' \
+      --query "length(imageIds[?@.imageTag=='latest'])" --output 'text' \
+  ) -le 0 \
+]] && echo "image 'repository:latest' exists" || echo "image 'repository:latest' does not exist"
+
 
 # Use ECRs as Docker registries.
 aws ecr get-login-password \
@@ -67,6 +75,13 @@ aws ecr describe-repositories --repository-names 'docker-tools/image-builder' \
 || aws ecr create-repository --repository-name 'docker-tools/image-builder'
 ```
 
+Constraints:
+
+| What            | Type   | Constraints                                                                                        | Reference                                                                                             |
+| --------------- | ------ | -------------------------------------------------------------------------------------------------- | ----------------------------------------------------------------------------------------------------- |
+| Image tag       | String | 1 <= length <= 300                                                                                 | [ImageIdentifier](https://docs.aws.amazon.com/AmazonECR/latest/APIReference/API_ImageIdentifier.html) |
+| Repository name | String | 2 <= length <= 256<br/>Must match `(?:[a-z0-9]+(?:[._-][a-z0-9]+)*/)*[a-z0-9]+(?:[._-][a-z0-9]+)*` | [Image](https://docs.aws.amazon.com/AmazonECR/latest/APIReference/API_Image.html)                     |
+
 ## Pull through cache feature
 
 > **Note:** when requesting an image for the first time using the pull through cache, the ECR creates a new repository

knowledge base/cloud computing/aws/s3.md

@@ -225,6 +225,7 @@ Examples: [1][lifecycle  configuration examples], [2][s3 lifecycle rules example
 - [Using S3 Intelligent-Tiering]
 - [Amazon S3 cost optimization for predictable and dynamic access patterns]
 - [Gateway Endpoints vs Internet Routing for S3]
+- [Understanding your AWS billing and usage reports for Amazon S3]
 
 ### Sources
 
@@ -260,6 +261,7 @@ Examples: [1][lifecycle  configuration examples], [2][s3 lifecycle rules example
 [lifecycle  configure notification]: https://docs.aws.amazon.com/AmazonS3/latest/userguide/lifecycle-configure-notification.html
 [lifecycle  general considerations for transitions]: https://docs.aws.amazon.com/AmazonS3/latest/userguide/lifecycle-transition-general-considerations.html
 [Understanding and managing Amazon S3 storage classes]: https://docs.aws.amazon.com/AmazonS3/latest/userguide/storage-class-intro.html
+[Understanding your AWS billing and usage reports for Amazon S3]: https://docs.aws.amazon.com/AmazonS3/latest/userguide/aws-usage-report-understand.html
 [Using S3 Intelligent-Tiering]: https://docs.aws.amazon.com/AmazonS3/latest/userguide/using-intelligent-tiering.html
 
 <!-- Others -->

snippets/aws/other commands.fish

@@ -116,6 +116,13 @@ aws ecr describe-pull-through-cache-rules --registry-id '012345678901' --ecr-rep
 
 aws ecr list-images --registry-id '012345678901' --repository-name 'cache/docker-hub'
 
+# Check images exist in the ECR.
+[[ $(
+	aws ecr list-images --repository-name 'repository' \
+		--query "length(imageIds[?@.imageTag=='latest'])" --output 'text' \
+	) -le 0 \
+]] && echo "image 'repository:latest' exists" || echo "image 'repository:latest' does not exist"
+
 
 ###
 # ECS