Test Cloud Run reliability with Gremlin Failure Flags. Inject latency and errors into containers to validate dependency failure handling.
Cloud Run scales to zero and back again on demand, which keeps costs low and makes one failure mode harder to spot. Requests waiting on a cold start and requests waiting on a stalled dependency look similar from the outside, and Cloud Run responds to both by adding instances.
Against a broken dependency, that response compounds the problem:
- A downstream call stops returning, and your container holds each request open.
- Concurrency per instance fills, so Cloud Run starts more instances.
- Each new instance makes the same call, multiplying load on a dependency that is already struggling.
- Requests keep arriving and keep not completing, so the scaler keeps climbing until something else gives.
Gremlin lets you rehearse this safely. Add the Failure Flags SDK to your container, deploy the Gremlin sidecar, and inject latency into a specific call while watching your instance count. A service that returns errors quickly lets the platform settle. One that holds the request keeps scaling, and now you know which one you deployed.
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 - GCP
Automatically monitor your Google Cloud services during testing in one-click with Intelligent Health Checks.
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.
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