To Containerize Docker is now easy with the assistance of our Support team. Let’s find out how?

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Let’s take a closer look at Containerization in Docker.

Containerization In Docker

Docker containers make it easier to create, deploy, and run applications. Containers are multiple virtual units in the user-space that is created by OS-based virtualization, also known as Containerization. It can run almost anywhere, making development and deployment much easier.

They also virtualize CPU, memory, storage, and network resources at the operating system level, giving developers a virtualized view of the operating system that is logically isolated from other applications. Docker is the most widely used open-source container format. Google Cloud Platform as well as Google Kubernetes Engine supports it.

Now we can examine more on how to Containerize Docker.

Architecture Of Docker

The main components of Docker Architecture include:

1. Clients and Servers: Docker is a client-server model. All containers comprise the Docker Daemon/Server. The Docker Daemon/Server receives the request from the Docker client via CLI or REST APIs and processes it appropriately.
2. Images: Using a read-only template, images build Docker containers. The foundation of every image is a base image, such as Ubuntu 14.04 LTS or Fedora 20.
3. File: A Dockerfile is a text file that contains instructions for building the Docker image. This image includes all of the project’s code and dependencies.
4. Registries: Docker Registry is a component for storing Docker images. We can store the images in either public or private repositories, allowing multiple users to collaborate on the application’s development.
5. Containers: They are runtime instances of Docker images. Containers contain the entire application kit, allowing the application to run in isolation.

The Docker Image and Docker Container are the two important terminologies we must keep in mind while going forward with this article. Now let’s discuss creating the docker container from the Docker image and containerizing the Docker.

Using A Docker Image To Build The First Docker Container

Now with a simple example, we will build the first Docker container from the Docker image. Type the following command in the command prompt:

docker run hello-world

The docker run hello-world command pulls the hello-world Docker Image from Docker Hub and then creates a Docker Container with this image. it then gives the container a random name and starts it. The container exit immediately.

To View Docker Container And Image

We can see the container and image with the below commands respectively:

docker ps -a

docker images

Else, we can also open the Docker Desktop app and navigate to the Images section on the left side of the screen, where we can see the hello-world image.

We should now see a container with a randomly assigned name if we click on the Containers / Apps items on the left side. By clicking, we can view the container’s logs, as well as the environment variables associated with the container and the running container’s statistics.

To Remove a Container

To delete a container, firstly use thedocker ps -a command to obtain the container ID of that container. Then use the container ID with thedocker rm command.

To Stop a Container

If we need to stop a running container, then we can use the Docker stop command with the container ID of the container we want to stop.

Benefits of Docker Containers

Our Support team lists some of the main benefits of the containers as:

1. Portable: The apps built inside Docker containers are extremely portable.
2. Scalable: It is also easy to move containers from a cloud environment to a local host, and then back to the cloud.
3. Speed: Development, testing, and deployment will be faster as containers are small, thus making it fast.

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Conclusion

Containers are multiple virtual units in the user space that are created by OS-based virtualization, also known as Containerization. In this article, our Expert team provides the necessary details on containerization in Docker along with the architecture of Docker.