A Step-by-Step Guide from Pulling to Pushing dockerImage with Example Commands

1. Pulling the Image from Docker Registry

Start by pulling the image from your Amazon ECR registry with the tag v1.0.0.

Command:

docker pull 12345689.dkr.ecr.us-east-1.amazonaws.com/asr-docker:v1.0.0

 

2. Attaching to the Image

Create and start a container from the image and attach to it with an interactive terminal.

Command:

docker run -it 12345689.dkr.ecr.us-east-1.amazonaws.com/asr-docker:v1.0.0 /bin/bash

 

3. Making Changes Inside the Container

After attaching to the container, make any necessary changes. Once done, exit the terminal by typing:

Command:

apt update && apt upgrade -yq && \
    apt install -yq \
        gcc \
        wget \
        htop \
        python3-pip

exit

 

4. Committing Changes

After making changes inside the container, commit those changes to a new Docker image.

Command:

docker commit <container_id> 12345689.dkr.ecr.us-east-1.amazonaws.com/asr-docker:v1.0.1

 

5. Tagging the New Image

Since the new image is already correctly tagged in this example, this step can be considered complete with the previous commit command. However, if you needed to tag the image differently, you would use:

Command:

docker tag 12345689.dkr.ecr.us-east-1.amazonaws.com/asr-docker:v1.0.1 12345689.dkr.ecr.us-east-1.amazonaws.com/asr-docker:another-tag

 

6. Pushing to Registry

Push your newly tagged image to the Amazon ECR registry.

Command:

docker push 12345689.dkr.ecr.us-east-1.amazonaws.com/asr-docker:v1.0.1

 

7. Cleanup

Finally, clean up unused Docker resources to free up space.

Commands:

docker system prune

docker image prune

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