Cross-Account/Event Replay with AWS EventBridge

1. Introduction

AWS EventBridge is a serverless event bus that makes it easy to connect applications using events. Cross-account capabilities allow you to receive and send events between different AWS accounts. This lesson covers how to set up cross-account event replay functionality.

2. Key Concepts

• Event Bus: A central hub that manages events and routes them to target services.
• Event Replay: The ability to resend events from an event bus to a target service.
• Cross-Account Access: Sharing event buses across different AWS accounts.

3. Step-by-Step Process

3.1 Setting Up EventBridge in the Source Account

1. Create an EventBridge event bus.
2. Define rules for the events you want to capture.
3. Set permissions to allow other accounts to publish events.

3.2 Setting Up EventBridge in the Target Account

1. Create an EventBridge event bus.
2. Set permissions to allow the source account to send events.
3. Create rules to process the incoming events.

3.3 Example Code for Permissions

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Effect": "Allow",
            "Principal": {
                "Service": "events.amazonaws.com"
            },
            "Action": "events:PutEvents",
            "Resource": "arn:aws:events:us-east-1:123456789012:event-bus/my-event-bus",
            "Condition": {
                "StringEquals": {
                    "AWS:SourceAccount": "098765432109"
                }
            }
        }
    ]
}
                

4. Best Practices

• Use IAM roles for cross-account access instead of hardcoding credentials.
• Limit permissions to only necessary actions and resources.
• Regularly review and audit your event bus configurations.

5. FAQ