Docker Hub public and private repos - Mini Project: Build & Apply

Docker Hub Public and Private Repositories

📖 Scenario: You are working as a DevOps engineer managing Docker images for your team. You need to organize your Docker images using Docker Hub repositories. Some images should be public for open access, while others must be private for security.

🎯 Goal: Learn how to create Docker Hub repositories, tag images correctly, and push images to both public and private repositories.

📋 What You'll Learn

Create a Docker image named myapp with tag v1

Tag the image for a public Docker Hub repository named username/myapp-public

Tag the image for a private Docker Hub repository named username/myapp-private

Push the image to the public repository

Push the image to the private repository

💡 Why This Matters

🌍 Real World

Docker Hub repositories help teams share container images securely and efficiently, separating public images from private ones.

💼 Career

Understanding Docker Hub public and private repos is essential for DevOps roles managing containerized applications and deployment pipelines.

1

Create a Docker image named myapp:v1

Write a Dockerfile that uses the alpine base image and creates a Docker image named myapp with tag v1. Then build the image using the command docker build -t myapp:v1 .

Docker

# Create a Dockerfile with FROM alpine and build the image with tag myapp:v1
# Your code here

Need a hint?

Use FROM alpine as the first line in your Dockerfile. Then run docker build -t myapp:v1 . in the terminal.

2

Tag the image for public and private Docker Hub repositories

Use the docker tag command to tag the image myapp:v1 as username/myapp-public:v1 for the public repo and as username/myapp-private:v1 for the private repo. Replace username with your Docker Hub username.

Docker

FROM alpine

# Build the image with:
# docker build -t myapp:v1 .

# Tag the image for public and private repos
# Your code here

Need a hint?

Use docker tag myapp:v1 username/myapp-public:v1 and docker tag myapp:v1 username/myapp-private:v1 to create the tags.

3

Push the image to the public Docker Hub repository

Use the docker push command to push the image tagged as username/myapp-public:v1 to Docker Hub. Make sure you are logged in with docker login before pushing.

Docker

FROM alpine

# Build the image with:
# docker build -t myapp:v1 .

docker tag myapp:v1 username/myapp-public:v1
docker tag myapp:v1 username/myapp-private:v1

# Push the public image
# Your code here

Need a hint?

Run docker push username/myapp-public:v1 to upload the public image.

4

Push the image to the private Docker Hub repository

Use the docker push command to push the image tagged as username/myapp-private:v1 to Docker Hub. Confirm that the private repository is set up in your Docker Hub account.

Docker

FROM alpine

# Build the image with:
# docker build -t myapp:v1 .

docker tag myapp:v1 username/myapp-public:v1
docker tag myapp:v1 username/myapp-private:v1

docker push username/myapp-public:v1

# Push the private image
# Your code here

Need a hint?

Run docker push username/myapp-private:v1 to upload the private image.