Steps for Committing Changes to Docker Image
Now we will create our own image from the existing alex43/ubuntu-with-git:v1.0 image and we will customize it with our needs and we will upload it.
Commit a Container
Step 1: Pull a Docker Image
The very first step is to pull the image as shown in the below image. Use the command and pull the image into your system as shown below.
docker pull alex43/ubuntu-with-git:v1.0
Step 2: Deploy The Container
After pulling the image run the container by using the below command where The “-it” flag instructs Docker to create an interactive bash shell in the container by allocating a pseudo-TTY linked to the container’s stdin. The command opens a new container and moves you to a fresh shell prompt so you can start working inside of it.
docker run -it <Imagename/ImageID> bin/bash
Step 3: Modify The Container
Know we are in the container we can install the required package or modify the image here we will try to install Nmap Software. Check whether the software has already been installed before you start installing it. with the following command.
nmap --version
- To install the Nmap use the following command.
apt-get install nmap
- Once the installation is complete, confirm once more that the software was installed as shown in the example below. And exit from the container.
Step 4: Commit Changes to The Image
- Lastly, commit the changes by using the syntax shown below to produce a new image.us the container ID and tag the new image with a new tag.
sudo docker commit [CONTAINER_ID] [new_image_name]
Execute the docker image ls after committing the image. We can see our recently committed image in this list.
Docker Commit
Docker is an open-source container management service and one of the most popular tools of DevOps which is being popular among the deployment team. Docker is mostly used in Agile-based projects which require continuous delivery of the software. The founder, Chief Technical Officer, and Chief Architect Officer of the Docker Open source project is Solomon Hykes. It was launched in 2013 by Dotcloud since then it is the world’s leading software container platform. For more details about containerization using docker and its docker architecture.
How we can create our own customized Docker images and how we can push them to the Docker hub profile? It is good practice to push your images to the docker hub profile as you don’t have to create it again and you can pull those images in your system as well as in the cloud with all your work saved in it.
Creating docker images is not a tedious task. We can create a docker image easily with a few commands. There are two ways of creating a docker image depending upon the purpose for which you want to create the image. The first method is using the commit command and another method is by using the Dockerfile concept. Know more details about the components of Docker ie, Docker images, and Docker File.
Now let’s start creating our own customized docker image using the commit command. Before going with our own docker image we should first set up and configure docker in our operating system. To learn more about how to set up docker you can refer to how to install docker. After successful installation let’s learn some of the docker commands.
Table of Content
- What Is Docker Commit?
- Options of Docker Commit
- Examples of Docker Commit
- Docker Commit Vs Docker Push
- Docker Commits To the Same Image
- How to Use Docker Commit?
- Steps for Committing Changes to Docker Image
- Additional Options for Docker Commit Command
- Difference between Docker commit and Docker Save
- When to Commit New Changes to a New Container Image