push to docker hub

Pushing images to Docker Hub is a simple task that can be accomplished smoothly with the right guidelines. This article provides a step-by-step tutorial to help you understand how to push to Docker Hub.

A basic introduction to Docker Hub

Docker Hub is a cloud-based platform service that allows you to link to code repositories, build your images, and test them. It is highly beneficial to use, especially if you are into cloud computing.

Step-by-step guide to pushing to Docker Hub

Follow the below steps to successfully push an image to Docker we’ll be using a simple username ‘dockerhubuser’ and a tag ‘app’.

Step 1 - Create a Docker Hub account

Access the Docker Hub website https://hub.docker.com and click on the ‘Sign up for Docker Hub’ button. Follow the prompts to create and verify your account.

Step 2 - Install Docker

If you haven’t done so already, install Docker on your machine. Instructions for installation for various operation systems can be found on the official Docker website.

Step 3 - Log into Docker Hub from your Docker CLI

You can use the Docker CLI to authenticate yourself with your Docker Hub account using the following command:

docker login 

You will be prompted to enter your username and password. Once the login is successful, you’ll see a message saying “Login Succeeded”.

Step 4 - Tag your Docker image

The next step is to tag the Docker image you want to push. Tagging helps with version control of your images and it’s highly recommended.

Here is how you tag your image:

docker tag my-image dockerhubuser/my-repo:app

The first part ‘my-image’ is the name of your local Docker image. ‘Dockerhubuser’ is your Docker Hub username, ‘my-repo’ is your Docker Hub repository name and the last part ‘app’ is the tag you are giving to the image.

Step 5 - Push the Docker image

Now that your Docker image is tagged, you can push it to your Docker Hub repository using the following command:

docker push dockerhubuser/my-repo:app

Replace ‘dockerhubuser’, ‘my-repo’ and ‘app’ with your actual Docker Hub username, your Docker Hub repository, and your tag respectively.

This command will upload your Docker image to Docker Hub. After the command is executed, the Docker image will be available in your Docker Hub repository.

In conclusion, pushing images to Docker Hub is a vital part of using Docker. It allows you to share your images and apps with the public or keep them private if you desire. It’s simple once you get used to it. Happy Dockering!