How to create custom image from running container and upload it to Docker Hub

Description: Here I have explained, How to create a custom image from the running container and upload it to Docker Hub in Public Repository.

Create Base Container: First I am going to create a base container, here I am using httpd container and creating some custom page in the apache path. 

• Pull httpd image from docker hub and verify after pulling from docker hub

          # docker pull httpd

• Create a container using httpd image and verify after running the container 

           # docker run  -td httpd

• After creating the container, Rename the container from a unique name using the docker rename command 
  
  # docker rename  peaceful_hermann httpd_servertech

• Add some custom pages on http path in the container. Enter into the container using the below command 
  

           # docker exec -it httpd_servertech /bin/bash

           # echo "This is test page from servertechnolab" > index.html 

Under the path of /usr/local/apache2/htdocs 

Create Image from Running container: After creating and modifying the container, I am going to create an image from the running container. 

• First, verify container images using the below command 

          # docker images

• Commit the container using the below command 

          # docker commit httpd_servertech

• Tag the image using below command 

           # docker tag 07f49b476db9 httpd_servertech

Push the image to Docker Hub: After creating the image, now I am going to push it to the docker hub

Login to docker hub using below command 

# docker login

It will popup for username and password of docker hub

Commit Docker Image: Commit docker image using docker commit command 

# docker commit -m="This is httpd custom image" httpd_servertech harpalgohilon/opensource

Here,

-m="This is httpd custom image": This is a commit message

httpd_servertech = the name of the container, from which you created the image

harpalgohilon/opensource = Name of the docker hub repository where you want to push the image.

Push the Image to Docker Hub: Now I am going to push the image to docker hub

# docker push harpalgohilon/opensource

After Upload you will get your image under docker repository

Change the Tag of image from latest to httpd

# docker tag harpalgohilon/opensource:latest harpalgohilon/opensource:httpd