description AWS Lambda with EventBridge Overview
This combination is excellent for building the *trigger* and *orchestration* layer of a DR plan. Instead of relying on scheduled scripts, you use EventBridge to detect state changes (e.g., primary region health check failure) and trigger a chain of Lambda functions. These functions can then execute the necessary steps: updating DNS records, starting EC2 instances, or calling DMS to initiate failover. It provides highly granular, event-driven control.
help AWS Lambda with EventBridge FAQ
How does AWS Lambda use EventBridge for disaster recovery?
Instead of relying on scheduled cron scripts, you configure EventBridge to monitor for state changes, such as a primary region health check failure. When a failure is detected, EventBridge immediately triggers a chain of AWS Lambda functions to initiate your failover process.
Can EventBridge trigger multiple Lambda functions simultaneously for a DR plan?
Yes, EventBridge can be configured to fan-out the event notification, triggering multiple Lambda functions simultaneously. This allows your disaster recovery plan to execute database failovers, switch DNS records, and notify administrators at the exact same time.
What is the execution time limit for Lambda functions in a DR orchestration chain?
AWS Lambda functions have a hard timeout limit of 15 minutes per execution. If your disaster recovery process requires longer-running tasks, your Lambda function will need to offload the job to an AWS Step Function or ECS task.
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