Push Docker Image to & Pull from DockerHub
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How to push and pull docker images from DockerHub
In this article we will learn from where the docker container images come from.
We will also learn how to pull and push image to Docker Hub.
To learn the basics & architecture of docker follow this article.
To learn how to install docker follow this article.
1. Obtaining an image from Docker Hub.
Docker Hub is where open Docker images are stored. When we run our first image by – docker run, it will first check if this image already exists on our machine, and if it is not then it will be downloaded from Docker Hub.
List docker images
We pull image from docker hub using
docker pull
Docker pull
2. First lets create your own image locally using Dockerfile.
We have a html application which displays simple index page with contents – ”
1 | This is the index page of html-app displayed from nginx container! |
Below is the sample index.html page which we will copy to the container –
cat index.html
1 | This is the index page of html-app displayed from nginx container! |
Below is the Dockerfile which we will use –
cat Dockerfile
1 | FROM nginx:latest |
1 | COPY ./index.html /usr/share/nginx/html/index.html |
Now to build image locally run docker build command –
1 | # docker ps |
1 | # docker build -t localhost/nginx-html-app:v1 . |
1 | # docker images |
Docker images
3. Create Docker Hub Account & repository
Log in on https://hub.docker.com/
Click on Create Repository.
Choose a name (e.g. prayags) and a description for your repository and click Create.
Log into the Docker Hub from the command line
docker login –username=prayags –email=prayag.rhce@gmail.com
As we can see in below image we have created repo – nginx-html-app
Create docker repository
4. Docker login
Login to docker hub using docker login
Docker login
5. Tag the docker image and push it
1 | # docker tag localhost/nginx-html-app:v1 prayags/nginx-html-app:v1 |
1 | # docker push prayags/nginx-html-app:v1 |
Docker push
6. Check docker hub portal for our newly push image
Check image in docker hub
7. Pull our custom docker image from docker hub
1 | # docker pull prayags/nginx-html-app:v1 |
Docker pull
1 | # docker images |
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