ecs: Managed Instances capacity providers, task definitions, and services

[isker]

Describe the feature

https://aws.amazon.com/blogs/aws/announcing-amazon-ecs-managed-instances-for-containerized-applications/
https://docs.aws.amazon.com/AmazonECS/latest/developerguide/ManagedInstances.html

Use Case

I want to choose ec2 instance types but not be in charge of patching my instances.

Proposed Solution

New constructs:

• ManagedInstancesCapacityProvider (note that this does not use CapacityProviderAssociations, instead referring directly to the cluster it's associated with by name)
• ManagedInstancesService
• ManagedInstancesTaskDefinition, though the general TaskDefinition, which is directly instantiable, should be updated to work as well.

Considerations I'm aware of compared to Fargate:

• No AssignPublicIp support.

Considerations I'm aware of compared to EC2:

• No PlacementStrategies support.
• RuntimePlatform may be required to get TaskDefinitions to work on ARM.

I'm sure there are many more.

Other Information

No response

Acknowledgements

• I may be able to implement this feature request
• This feature might incur a breaking change

AWS CDK Library version (aws-cdk-lib)

2.218.0

AWS CDK CLI version

2.1029.2

Environment details (OS name and version, etc.)

N/A

[isker]

Okay, this feature got added in #35648.

But, @kg-aws, I'm not sure the validation here is correct:

aws-cdk/packages/aws-cdk-lib/aws-ecs/lib/base/task-definition.ts

Lines 495 to 498 in 4ba45d9

	// Managed Instances require both CPU and memory specifications
	if (!props.cpu || !props.memoryMiB) {
	throw new ValidationError(`Managed Instances-compatible tasks require both CPU (${props.cpu}) and memory (${props.memoryMiB}) specifications`, this);
	}

I have been running managed instances tasks that do not have task-level memory/cpu requirements, and only have container-level memoryReservation/memory requirements instead.

[pahud]

Thank you for bringing this up to our attention.

Requesting @kg-aws for the inputs and clarifying.

This is an amazing new feature from ECS and we are excited to see active CDK support.

[isker]

@kg-aws please take a look ^.

[kg-aws]

Hi @isker - Thank you for bringing this to our attention. I will create a fix for it.

[isker]

Thanks!

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