Add Example for Cross Account EventBridge in Organizations

[samtwil]

Describe the feature

This AWS CDK sample illustrates how to implement an Event Driven Architecture with Amazon EventBridge that involves multiple accounts in an AWS Organization.

Use Case

EventBridge is a key AWS Service in Event Driven Architectures, it allows separation between producers of messages and consumers of those messages. In a single account this is straight forward, but in a modern multi account structure some additional considerations are required in order to allow for events on the Event Bus in one account to be consumed from the Event Bus in another account.

Proposed Solution

1. The Producer Lambda function in Account A puts an event on the EventBridge Bus.
2. The cross-account EventBridge Rule routes the event to an EventBridge Bus in Account B.
3. The EventBridge Bus in Account B has a Rule target which invokes the Consumer Lambda function.

Other Information

No response

Acknowledgements

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

Language

Python

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