Add --engine-arn to update-canary

[socketbox]

Describe the feature

I'd like to see update-canary be capable of taking an --engine--arn argument that does what the Java and Go SDK are capable of with setEngineArn and SetEngineArn.

Use Case

When instantiating canaries outside of the AWS Console, either via IaC-related approaches or some other means, it's possible for the canary to become out-of-sync with its attendant Lambda function's latest version.

If there was a different use case that was behind the creation of the setEngineArn/SetEngineArn methods of the SDKs, then I'd think that same use case would apply here as well.

Proposed Solution

As mentioned, I think this could be as simple as adding an --engine-arn option to aws synthetics update-canary.

Other Information

No response

Acknowledgements

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

CLI version used

aws-cli/2.11.16 Python/3.11.3 Linux/6.2.0-33-generic

Environment details (OS name and version, etc.)

Linux/6.2.0-33-generic x86-64 Linux Mint 21.2

[tim-finnigan]

Hi @socketbox thanks for the feature request. The AWS CLI update-canary command corresponds to the UpdateCanary API. That API is maintained Amazon CloudWatch Synthetics service team, so we would need to forward feature requests like this to that team. They may have a reason for only allowing the setting of EngineArn via CreateCanary but we can try to find out more info. I'm going to transfer this to our cross-SDK repository, as service APIs are used across AWS SDKs and should have consistent behavior. (ref: P101834216)

[tim-finnigan]

We heard back from a member of the service team and they have added this feature request to their backlog. We cannot guarantee if or when the service team would implement this feature, but feel free to check back in the future for updates. We recommend reaching out through AWS Support if you have a support plan.

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