(synthetics): add tracing

[thomasklinger1234]

Enable active tracing (https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-synthetics-canary-runconfig.html#cfn-synthetics-canary-runconfig-activetracing) for a canary.

Use Case

End-to-end tracing from Canary to API Gateway to Lambda.

Proposed Solution

Add a new property to synthetics.CanaryProps:

new synthetics.Canary(this, 'MyCanary', {
  ...,
  activeTracing: true,
})

By default, it will be false. When set to true, it will also append XRay permissions to the IAM role (e.g. the managed policy arn:aws:iam::aws:policy/AWSXrayWriteOnlyAccess).

Other

Similar PR: #11865.

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

---

This is a 🚀 Feature Request

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[wilhen01]

Bump. This would be nice to have.

[verma-rajatk]

Any updates or a work around on how to do it?

[wilhen01]

@verma-rajatk you can use the Level 1 constructs to enable x-ray tracing on a Canary:

const canary = new Canary(this, 'Canary', canaryProps);
// enable x-ray tracing for Canary
const cfnCanary = canary.node.defaultChild as CfnCanary;
cfnCanary.runConfig = {
  ...cfnCanary.runConfig,
  activeTracing: true,
};

Can't remember if you need to add any extra permissions to allow that to work, you might need to tweak the role it runs under as well.