Docker is a young container technology that provides easily-configured, lightweight VMs that start up fast, ideal for microservice architectures and environments that scale rapidly or release often. With the recent release of AWS's EC2 Container Service (ECS), Docker has taken another step towards maturity by providing a service that automatically manages your Docker containers for you. ECS balances load among containers, recovers unhealthy containers, provides scaling automation, and more. However, monitoring containers can be challenging due to their rapid presence and potential downtime. Datadog is a purpose-built tool designed to monitor highly dynamic infrastructure, including containers, with a tailored ECS integration that automatically tracks new container metrics and handles offline containers gracefully. With Datadog, users can track their containers, view individual metrics, group them dynamically, correlate with other infrastructure metrics, set service-level alerts, and gain immediate visibility into any problems affecting their Docker infrastructure.