Pushing images to registry in Docker - Mini Project: Build & Apply

Pushing images to registry

📖 Scenario: You are working on a small project where you need to share your Docker image with your team. To do this, you will push your Docker image to a remote registry so others can download and use it.

🎯 Goal: Learn how to tag a local Docker image and push it to a remote Docker registry step-by-step.

📋 What You'll Learn

Have Docker installed and running on your machine

Have a local Docker image named myapp with tag v1

Have access to a Docker registry (for example, Docker Hub) with username myusername

💡 Why This Matters

🌍 Real World

Developers often need to share their Docker images with teammates or deploy them to cloud services. Pushing images to a registry makes this easy.

💼 Career

Knowing how to push Docker images is a key skill for DevOps engineers, cloud engineers, and developers working with containerized applications.

1

Create a local Docker image

Create a local Docker image called myapp with tag v1 using the command docker build -t myapp:v1 .

Docker

# Run the command to build the Docker image
# Your code here

Need a hint?

Make sure you run this command in the directory with your Dockerfile.

2

Tag the local image for the remote registry

Tag the local image myapp:v1 with the remote registry name myusername/myapp:v1 using the command docker tag myapp:v1 myusername/myapp:v1

Docker

docker build -t myapp:v1 .
# Tag the image for the remote registry
# Your code here

Need a hint?

Use the docker tag command to add the remote registry prefix to your image.

3

Log in to the Docker registry

Log in to the Docker registry using the command docker login and enter your username myusername and password when prompted

Docker

docker build -t myapp:v1 .
docker tag myapp:v1 myusername/myapp:v1
# Log in to the Docker registry
# Your code here

Need a hint?

Run docker login and enter your Docker Hub credentials when asked.

4

Push the tagged image to the registry

Push the tagged image myusername/myapp:v1 to the remote registry using the command docker push myusername/myapp:v1

Docker

docker build -t myapp:v1 .
docker tag myapp:v1 myusername/myapp:v1
docker login
# Push the image to the registry
# Your code here

Need a hint?

Use docker push with the full image name including your username.