Amazon EC2 Container Service Supports Task Definition Deregistration and Environment Variable Overrides
You can now deregister task definitions that are no longer needed. Task definitions are a description of an application that contains one or more container definitions. You create new task definition revisions as you update your application. You can now deregister task definitions to remove outdated revisions. You can also sort task definitions from oldest to newest or newest to oldest, making it easy to find specific task definition revisions.
You can now override task definition environment variables when running a task. Task definitions can include environment variables that are passed into a container. For example, a container may use an environment variable to set the database endpoint. Environment variable overrides let you set this information when the container is started with ‘run-task’. Now, you can set a different database endpoint for a test environment and a production environment by overriding the environment variable in the task definition when you run a task.
Please visit our product page for more information about Amazon EC2 Container Service.