AWS Elastic Beanstalk helps your team ship applications without needing to be infrastructure specialists. It provisions EC2 instances, wires up load balancers, and monitors environment health. What it doesn't do is guarantee your application survives losing one of those instances.

Beanstalk creates a gap in ownership. The platform looks after the infrastructure, so nobody on your team tests it. Environments built years ago still use default values that nobody chose on instances nobody provisioned, yet the business relies on them.

Gremlin closes that gap. Install the Gremlin Agent through an .ebextensions configuration and it deploys with every environment update, giving you the same testing coverage on Beanstalk that you have on any other EC2 workload. Shutdown experiments confirm health monitoring catches a degraded instance and replaces it. CPU and memory experiments show you where autoscaling triggers relative to the load that actually hurts your response times. And dependency experiments highlight any reliability risks that services outside of your environment might pose.

Beanstalk manages your infrastructure. Proving your application survives that infrastructure failing is still your job, and it is worth doing before a customer does it for you.