Task definitions in AWS - Mini Project: Build & Apply

Create an AWS ECS Task Definition

📖 Scenario: You are setting up a containerized application on AWS ECS (Elastic Container Service). To run your containers, you need to create a task definition that describes the container settings.

🎯 Goal: Build a simple AWS ECS task definition JSON that specifies a container with a name, image, and resource limits.

📋 What You'll Learn

Create a task definition dictionary with the required fields

Add a container definition with a specific name and image

Set CPU and memory limits for the container

Include essential container properties for ECS

💡 Why This Matters

🌍 Real World

Task definitions are essential for running containerized applications on AWS ECS, defining how containers should run.

💼 Career

Understanding task definitions is important for cloud engineers and DevOps professionals managing container deployments on AWS.

1

Create the basic task definition dictionary

Create a dictionary called task_definition with the key family set to "my-task-family" and an empty list for the key containerDefinitions.

AWS

# Create the task_definition dictionary with 'family' and empty 'containerDefinitions' list
# Your code here

Need a hint?

Think of the task definition as a dictionary with keys for family and container definitions.

2

Add container configuration variables

Create a dictionary called container with keys name set to "my-container" and image set to "nginx:latest".

AWS

task_definition = {
    "family": "my-task-family",
    "containerDefinitions": []
}
# Create the container dictionary with 'name' and 'image'
# Your code here

Need a hint?

The container dictionary holds the container's name and the Docker image to use.

3

Add CPU and memory limits to the container

Add the keys cpu with value 256 and memory with value 512 to the container dictionary.

AWS

task_definition = {
    "family": "my-task-family",
    "containerDefinitions": []
}
container = {
    "name": "my-container",
    "image": "nginx:latest"
}
# Add 'cpu' and 'memory' keys to container
# Your code here

Need a hint?

CPU and memory are numeric values representing resource limits for the container.

4

Add the container to the task definition

Append the container dictionary to the containerDefinitions list inside task_definition.

AWS

task_definition = {
    "family": "my-task-family",
    "containerDefinitions": []
}
container = {
    "name": "my-container",
    "image": "nginx:latest",
    "cpu": 256,
    "memory": 512
}
# Add the container dictionary to the containerDefinitions list
# Your code here

Need a hint?

Use the append method to add the container dictionary to the list inside task_definition.