Docker and bare metal hypervisor are two different types of virtualization technologies that have

different functioning mechanisms, architectures, and use cases. Docker is a containerization

technology that allows users to create, deploy, and run applications using containers. Containers are

isolated environments that share the same host operating system kernel, but have their own

libraries, dependencies, and resources. Docker can run multiple containers on the same host,

without requiring a separate operating system for each container12. Bare metal hypervisor, also

known as type 1 hypervisor, is a software that runs directly on the hardware and creates virtual

machines. Virtual machines are complete operating systems that have their own kernel, drivers, and

resources. Bare metal hypervisor can run multiple virtual machines on the same host, each with a

different operating system and dedicated resources3 .

The main difference between Docker and bare metal hypervisor is the level of abstraction they

provide. Docker uses OS-level virtualization, which means it creates containers on top of the host

operating system. Bare metal hypervisor uses hardware virtualization, which means it runs

independently from the host operating system and creates virtual machines on the hardware layer.

This difference has implications for the performance, efficiency, and portability of the virtualized

environments. Docker containers are generally faster, lighter, and more scalable than virtual

machines, as they do not have the overhead of running a separate operating system for each

container. However, Docker containers are more limited and can run only on Linux, certain Windows

servers and IBM mainframes if hosted on bare metal. Virtual machines, on the other hand, are more

flexible and secure, as they can run any operating system and isolate the guest operating system

from the host operating system. However, virtual machines are more resource-intensive and slower

than containers, as they have to emulate the hardware and run a full operating system for each

virtual machine12.

Reference:

Docker vs VMWare: How Do They Stack Up? | UpGuard

Hypervisor vs. Docker: Complete Comparison of the Two - HitechNectar

Beginners Track - Docker On Bare Metal | dockerlabs

[Getting Started: Layer 3 Subinterfaces - Palo Alto Networks Knowledge Base]