What is Docker?

Docker may be defined as a containerization platform that bundles all of our apps into a single package, allowing us to execute them in any environment. This implies that our application will operate well in any setting, making it simple to develop product-ready software. Docker wraps the required software in a file system that contains everything needed to run the code, including the runtime, libraries, and system tools. Containerization technology, such as Docker, uses the same operating system kernel as the machine, making it very fast. This means we only need to start Docker once, and the rest of the process will be easy and seamless because our OS is already operating.

Docker is a simple container that let’s you specify a complete package of components needed to run your software (similar to a VM with no OS). You can then easily deploy the docker container, which includes everything your software needs, to one or more machines.

Following are the reasons to use containers:

  • Containers have no guest OS and use the host’s operating system. So, they share relevant libraries & resources as and when needed.
  • Processing and execution of applications are very fast since applications specific binaries and libraries of containers run on the host kernel.
  • Booting up a container takes only a fraction of a second, and also containers are lightweight and faster than Virtual Machines.