Lecture Notes: Introduction to AWS ECR and ECS Integration

Overview

• ECR (Elastic Container Registry): Docker container registry service to store container images.
• ECS (Elastic Container Service): Service to run Docker containers on AWS.

Key Concepts

• ECR Responsibilities:
  • Creating repositories for Docker images.
  • Storing multiple image versions (tags).
  • Assigning task definitions in ECS.

Workflow

1. Testing and Building Docker Images Locally: Create and test Docker images locally before pushing to ECR.
2. Pushing Images to ECR:
   • Create a repository in ECR using AWS Console.
   • Build the Docker image with appropriate commands based on OS and architecture:
     • Mac OS/Linux: docker build --platform linux/amd64 .
     • Windows/Mac Silicon: Alternative commands specific to the platform.
   • Tag the Docker image.
   • Push the Docker image to the created ECR repository using docker push command.
3. Using Images in ECS: Utilize the images stored in ECR for creating task definitions and running tasks in ECS.

Steps to Push Docker Image to ECR

• Login to ECR: Authenticate Docker to your Amazon ECR registry.
• Build Image: Use the docker build command with appropriate flags.
• Tag Image: Tag the image with the repository URI.
• Push Image: Push the tagged image to the ECR repository.
• Verify Upload: Check the ECR repository to ensure the image is uploaded.

Commands and Examples

• Create Repository: Perform this in the AWS Console.
• Build Image (Example for Mac OS/Linux): docker build --platform linux/amd64 -t your-image-name .
• Tag Image: docker tag your-image-name:latest your-repo-uri:latest
• Push Image: docker push your-repo-uri:latest

Conclusion

• Successfully pushing a Docker image to ECR makes it available for ECS task definitions.
• Ensures easy management and deployment of containerized applications using AWS services.

Next Steps

• Further videos or lectures on advanced ECS configurations and deployments.