Now, in addition to supporting ELB health checks, Amazon ECS integrates with Docker container health checks to allow you to explicitly define and monitor the health of each container. Using the HEALTHCHECK command, you can define which parameters to monitor for each container in your Task Definition. Running tasks (groups of running containers) are now assigned a health status based on the health of their essential containers, and the task's health status is integrated with the ECS service scheduler to automatically redeploy unhealthy tasks and conduct rolling-updates of services. You can check the health status of your tasks and containers in the ECS Console or with the ECS DescribeTasks API.