Test AWS Lambda reliability with Gremlin Failure Flags. Inject latency and errors into function code to validate timeouts, retries, and fallbacks.
Serverless removes your servers, not your reliability risks. AWS Lambda handles provisioning, patching, and scaling, but the moment a function stalls on a slow database call or hits a concurrency ceiling, your customer sees a failed request. Traditional infrastructure testing can't reach that code, so it often goes untested.
Gremlin closes that blind spot with Failure Flags, which brings fault injection into the function itself. Add the Lambda extension and run experiments against a real deployment without impacting performance or changing how the function behaves during normal operation.
Answer questions such as:
- Does the function fail fast when a dependency stalls? Inject latency into a downstream call and find out whether your timeout fires before the caller upstream gives up.
- Do retries help or hurt? Lambda retries asynchronous invocations two more times by default. Trigger an exception and watch whether your retry logic gives a struggling dependency room to recover or buries it.
- Would anyone notice if our function failed? Fail an invocation and check whether an alarm fires, whether the error lands in CloudWatch, or whether it fails silently.
Serverless changed where your reliability risks live, not whether you have them. The function code is the only layer left to test, which makes it the one worth testing.
Dependencies: Failure Test
Simulate a failed dependency by dropping all network traffic to the dependency.
Dependencies: Latency Test
Recreate poor network conditions by delaying all network traffic to a dependency by 100ms.
Unreliable Networks - Dependencies
Simulate unreliable network conditions when communicating with dependencies by adding latency to API calls. Test whether your users are affected when dependency response times degrade.
* Failure Flags works wherever you can add the SDK to your application and run the Gremlin sidecar. Not every language and platform combination has been individually tested, and not all are officially supported. Check our compatibility documentation for what's verified, or get in touch if you don't see your runtime.
Intelligent Health Checks - AWS
Automatically monitor your AWS services during testing in one-click with Intelligent Health Checks.
AWS integration
Integrate Gremlin with your AWS account for automatic Health Check creation, service discovery, and more.
Using Failure Flags by proxy
Use Failure Flags, Gremlin's application-level fault injection feature, without changing a single line of code.
Installing Gremlin on Amazon ECS
Learn how to install Gremlin on EC2-backed Amazon Elastic Container Service (ECS) deployments.
Installing Gremlin on AWS - Configuring your VPC
Amazon Web Services (AWS) has unique networking requirements that must be implemented for Gremlin to run successfully…
Avoid downtime. Use Gremlin to turn failure into resilience.
Gremlin empowers you to proactively root out failure before it causes downtime. See how you can harness chaos to build resilient systems by requesting a demo of Gremlin.
.svg)