First, you need to log in to your Docker Hub account from your terminal:
docker login
You’ll be prompted to enter your Docker Hub username and password.
3. Tagging Your Docker Image
Tag your Docker image to prepare it for pushing. The tag format is username/repository:tag.
docker tag local_image_name username/repository:tag
For example, if you have an image called my_app and your Docker Hub username is my_user, you might tag it like this:
docker tag my_app my_user/my_app:latest
4. Pushing the Docker Image to Docker Hub
Once your image is tagged correctly, push it to Docker Hub using the docker push command:
docker push username/repository:tag
Continuing from the previous example:
docker push my_user/my_app:latest
5. Verifying the Push
After the push completes, you can verify that your image is on Docker Hub by visiting your Docker Hub repository in a web browser.
6. Full Example Workflow
Here’s a full example workflow:
Build the Docker image (if not already built):
docker build -t my_app .
Tag the Docker image:
docker tag my_app my_user/my_app:latest
Log in to Docker Hub:
docker login
Push the image to Docker Hub:
docker push my_user/my_app:latest
Caution
When tagging, remember to include your docker hub username, docker does not automatically prepend your username when tagging. This makes sure that the image is associated with your account
Note
Alternatively, we can combine steps 1 and 2 together by doing
docker build -t my_user/my_app:latest .
7. Managing Multiple Tags
You can push multiple tags of the same image. For example, if you want to tag and push both latest and v1.0:
docker tag my_app my_user/my_app:latestdocker tag my_app my_user/my_app:v1.0docker push my_user/my_app:latestdocker push my_user/my_app:v1.0
8. Additional Tips
Ensure your image names and tags are meaningful for easy identification and version control.
Keep your Docker Hub credentials secure and avoid sharing them.