Hypervisor vs Container technology — Let’s discuss

Hypervisor

Hypervisor is a kind of software which allows us to have multiple virtual machines within one physical machine.

Basically, hypervisor will allocate the resources of the host physical machine (like RAM, CPU etc.) in between the virtual machines. This hypervisor provides portioning and isolation of the hardware and creates virtual machines, so it is also called virtualization hypervisor. So depending upon resource availability on the host machine, we can create a limited number of virtual machines. The virtual machines will have their own OS.

Types of Hypervisor

There are two types of Hypervisor.

• Type 1 hypervisor or Bare metal hypervisor or Native hypervisor
• Type 2 hypervisor or hosted hypervisor

Type 1 hypervisor or Bare metal hypervisor or Native hypervisor

This type of hypervisor runs directly on the hardware of the host machine. It does not need any underlying OS. This type of hypervisor directly talk with the hardware.

Example: Microsoft Hyper-V hypervisor, etc.

Type 2 hypervisor or hosted hypervisor

This type of hypervisor require an underlying OS, otherwise they can’t run. Since this hypervisor need OS of the hosted system, hence it is called “hosted hypervisor”. In this case, hypervisor will be installed on the OS as a software and hypervisor will communicate with hardware through OS.

Example: Oracle Virtual Box, VMware workstation etc.

Container Technology

Fundamentally, Container technology is a way to package an application and all its dependencies, so that the application can run reliably when we change the environment. That means container technology enables the portability and make sure that application can run with all dependencies, maintaining isolation from other processes.

Unlike hypervisor which virtualize the hardware of the host machine to create multiple VM, container technology virtualize the OS of the host machine to create multiple containers.

Example: Docker

Comparison between hypervisor, VMs and container technology

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