Difference Between Docker vs Virtual Machine

2 min readSep 2, 2020

Docker & Virtual Machine

Docker

Docker is a software development tool and a virtualization technology that makes it easy to develop, deploy, and manage applications by using containers.

It is a container-based technology that lets you develop distributed applications.

Virtual Machine

A virtual machine is a computer file or software usually termed as a guest, or an image that is created within a computing environment called the host.

Each virtual machine requires its underlying operating system, and then the hardware is virtualized.

Difference Between Docker & Virtual Machine.

Operating System Support

Virtual machine has its guest operating system above the host operating system, which makes virtual machines heavy. While on the other hand, Docker containers share the host operating system, and that is why they are lightweight.

Security

A container have a lot of security risks, and vulnerabilities as the containers have shared host kernel. Docker are more secure as compared to Containers.

Performance

VM are more resource-intensive than Docker containers as the VM need to load the entire OS to start. The lightweight architecture of Docker containers is less resource-intensive than virtual machines.

Portability

Docker containers are easily portable because they do not have separate operating systems. On the other hand, virtual machines have separate OS, so porting a virtual machine is difficult.

Apart from the major differences, some other differences are summarized below:

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