eventbridge

To set up an EventBridge rule on a custom event bus, define an event pattern matching specific sources like "my-app.orders" and detail-types, then configure a Lambda target and apply least-privilege permissions using source-ARN scoping.

Cross-account event forwarding in EventBridge works by configuring an event bus policy allowing a rule in one account to send matched events to a target, such as an SQS queue or Lambda function, in a different AWS account.

The best way to schedule recurring serverless automation is using EventBridge scheduled rules or EventBridge Scheduler, which provide flexible timing options to trigger targets like Lambda, ECS, or Step Functions for one-time or recurring workloads.

You filter high-signal events using EventBridge event patterns by matching specific event fields like source, detail-type, and detail content, ensuring only relevant events such as "Order Created" forward to your processing targets.

Events may not reach your Lambda target due to incorrect event pattern matching, disabled rule states, or missing Lambda permissions, requiring evidence-based troubleshooting and validation of event payloads against your rule definitions.

To handle EventBridge target invocation failures, configure dead-letter queues (DLQs) to capture failed events, apply rule state controls, and implement monitoring to ensure reliable event-driven automation and prevent missed workflows.