Tagging and Pushing Images to DockerHub

30 minutes
  • 5 Learning Objectives

About this Hands-on Lab

You have just completed building a Dockerfile, and you are ready to push it to Docker Hub. First make sure that you have a Docker Hub account. Then build your image with the `VERSION` build argument that is set to `1.5`. Finally, tag the image to `latest`, and push both images to Docker Hub.

Learning Objectives

Successfully complete this lab by achieving the following learning objectives:

Log in to Docker Hub

Login to Docker Hub:

[cloud_user@host]$ docker login
Get the Git Commit Hash

Use Git commit hash as the image tag:

cd weather-app
cd src
git log -1 --pretty=%H
Build the `weather-app` Image

Build the image:

cd ../
[cloud_user@host]$ docker image build -t [USERNAME]/weather-app:[HASH] --build-arg VERSION=1.5 .
Tag the `weather-app` as Latest

Tag the image to latest:

[cloud_user@host]$ docker image tag [USERNAME]/weather-app:[HASH] [USERNAME]/weather-app:latest
Push Both Images to Docker Hub

Push both images to Docker Hub:

docker image push [USERNAME]/weather-app:[HASH]
docker image push [USERNAME]/weather-app:latest

Additional Resources

At the command line, login into Docker Hub.
Navigate to the src directory in weather-app.
Execute git log -1 --pretty=%H to get the commit hash.
Drop back down to the weather-app directory.
Build the image and tag it with [USERNAME]/my-weather-app:[COMMIT_HASH]. You will need to set the VERSION build argument and set it to 1.5.
Then tag it as latest. Push both images to Docker Hub.

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