In this series of articles, we are addressing the patterns for the resilience of cloud-native serverless systems. Please refer to article one for the introduction of this series.
Pattern 3: Lambda Synchronous Invocation and Circuit State Validated by API Gateway and Leveraging Fallback Switchover
In this option, let's consider Lambdas serving synchronous requests through the API gateway. In this option, the API Gateway starts sending traffic to the fallback service when there are issues with the external service.