Docker access virtualisation features of Linux

Docker is a popular tool used for creating and managing containers, which are isolated environments for running applications. One of the key features of Docker is its ability to use the virtualization features of the Linux operating system to create and manage these containers.

Linux is a widely used operating system that is known for its virtualization capabilities, and Docker takes advantage of these capabilities to create and manage containers. Specifically, Docker uses Linux namespaces and cgroups to create and manage containers.

Linux namespaces allow Docker to create isolated environments for containers, where the container has its own view of the system and its own process ID space, network interfaces, and other resources. This allows multiple containers to run on the same host system without being able to see or access each other's processes.

Cgroups (short for "control groups") are used by Docker to limit the resources (such as CPU, memory, and networking) available to a container. This ensures that each container only has access to the resources that it needs, and prevents one container from using more resources than it should and potentially impacting the performance of other containers or the host system.

By using these virtualization features of Linux, Docker is able to create and manage containers in a way that allows multiple containers to run on the same host system while remaining isolated from each other. This makes it easier to package and deploy applications consistently, regardless of the host environment.

Overall, the ability to access and utilize the virtualization features of Linux is a key aspect of Docker and helps make it a powerful tool for creating and managing containers.

In addition to using Linux namespaces and cgroups to create and manage containers, Docker also provides a number of other features that make it easy to use and work with containers.

One of these features is the Docker Engine, which is the runtime that allows you to build and run Docker containers. The Docker Engine includes a number of tools and utilities, such as the Docker CLI (command-line interface) and the Docker API (application programming interface), which allow you to build, manage, and deploy containers in various ways.

Another feature of Docker is the Docker Hub, which is a cloud-based registry service that allows you to store and distribute Docker images. Docker images are pre-built packages that contain all of the dependencies and code needed to run an application, and the Docker Hub makes it easy to find and use these images.

Finally, Docker also provides tools for networking and storage, which allow you to connect containers to each other and to external resources such as databases and file systems. These tools make it easy to build and deploy complex, multi-container applications that can scale and adapt to changing workloads.

Overall, Docker is a powerful tool for creating and managing containers, and its ability to access and utilize the virtualization features of Linux is a key aspect of its functionality. By using Docker, developers can easily package and deploy applications in a consistent and reliable way, regardless of the host environment.