[batch] Add Support for AWS Batch

[cschwartz1020]

Feature scope

AWS Batch

Describe your suggested feature

Feature request is for an AWS Batch Monitoring construct

[echeung-amzn]

Do you have particular alarms and dashboard widgets that you think would make sense for Batch users?

[cschwartz1020]

Do you have particular alarms and dashboard widgets that you think would make sense for Batch users?

The most basic requirement would be widgets which show the number of Batch Job instances in any given status (SUBMITTED, PENDING, RUNNABLE, STARTING, RUNNING, SUCCEEDED, FAILED) for a given Job Queue or Job Definition.

However, I do understand this would likely be a large effort given that these metrics are currently not even sent to CloudWatch (i.e. there's no Batch CW namespace--no native metrics or CW integration). I have seen this solved before via EventBridge rules which route Batch Job State Change event detail types to an SNS Topic target, and from there you can track the AWS/SNS namespace "NumberOfMessagesPublished" metric. Although, this is somewhat of heuristic as it tells you how many jobs entered a given state during a period as opposed to how many jobs are in a given state. Regardless, it would be nice to have a construct that takes care of all this heavy lifting for you via .monitorBatchJob(..). It would also be nice to add a dimension of EC2 Instance Type, so you can see how workloads are spread across the instances configured on the Batch ComputeEnvironment.

Beyond that, it would be nice to have basic CPU/GPU (mem/util) metric widgets from the nodes on the underlying ECS/EKS cluster powering the Batch ComputeEnvironment.