Guide to AWS ECS Task Definitions

Importance: Task definitions are crucial in AWS Elastic Container Service (ECS) as they describe the docker container parameters for application running on ECS. They function as a blueprint for your application, ensuring consistent and efficient operation.
What is it: A task definition in AWS ECS is a JSON file that describes one or more containers that form your application. It contains settings like the docker image to use, the required resources, environment variables, and other configuration details.
How it works: When you launch a task or service in ECS, the task definition gets run as a unit. It could encompass multiple containers working together, like a web server and a database, defined and working together in unison. The task is then scheduled onto an instance where it enters the 'Running' state till it finishes.
Exam Tips - Answering Questions on Task Definitions: Understand that a Task Definition specifies the docker image details, the resources and the network. Reread the question to understand what's being asked. Remember, you don't need to remember specific parameters. Think broadly about how Task Definitions act as a blueprint for applications. Be aware of when and why to use multiple containers in a single definition.
Remember: the components of a task definition, how it operates as a unit, and its importance in structuring and maintaining your application in AWS ECS.