How should the DevOps Engineer overcome this?
Add a BeforeAllowTraffic hook to the AppSpec file that tests and waits for any necessary database changes before traffic can flow to the new version of the Lambda function
Add an AfterAllowTraffic hook to the AppSpec file that forces traffic to wait for any pending database changes before allowing the new version of the Lambda function to respond
Add a BeforeInstall hook to the AppSpec file that tests and waits for any necessary database changes before deploying the new version of the Lambda function
Add a ValidateService hook to the AppSpec file that inspects incoming traffic and rejects the payload if dependent services, such as the database, are not yet ready
Explanations:
The BeforeAllowTraffic hook allows testing and ensuring that any necessary database changes are fully propagated before the new Lambda version starts handling traffic. This prevents the Lambda function from executing with incomplete or inconsistent data.
The AfterAllowTraffic hook happens after traffic is allowed to the new version, meaning it does not help in ensuring database changes are propagated before the Lambda function begins processing.
The BeforeInstall hook is triggered before the new Lambda version is deployed. It doesn’t help with the propagation of database changes before the Lambda function executes, as it is focused on tasks related to the deployment itself.
The ValidateService hook checks the health of the deployed service and its dependencies, but it does not provide a way to ensure database changes are fully propagated before allowing traffic. The focus is on validating the service after deployment.
I suspect that the answer is:
Add a BeforeAllowTraffic hook to the AppSpec file that tests and waits for any necessary database changes before traffic can flow to the new version of the Lambda function