Containers realize a multi-OS environment
In order to improve efficiency and respond to rapid changes in the IT field in terms of development and operation, virtualization software was introduced and used. Virtualization software provides a portable environment by bundling multiple OS environments and applications into a unit file called a VM image. However, when the density is increased with multiple VMs, performance degradation and interference of virtualization software that provides a virtual environment for hardware to the Guest OS have become a problem. Unlike the existing hypervisor-type virtualization, Container can make one OS environment into a separate space called a container, and provide a different OS environment for each separated space.

Containers have the advantage of integrating IT systems that require multiple OS versions into one OS environment because they can realize a multi-OS environment.

Containers provide an isolated space for applications. Since the virtual OS environment can be separated by process unit within one OS environment, a multi-OS environment can be provided. For example, you can run CentOS 6.6 containers and Ubuntu Server 14.04 LTS containers multiple times by leveraging containers on a CentOS 7 host OS.
Container Technology Is your company?
Both physical servers and virtual machines are running the OS that controls them. Even if you run multiple servers as virtual machines on one physical server, each virtual machine needs to run an OS.

While the OS is designed to be universally usable, it requires resources because it includes many features. So, if we can share this part of the OS as well, we can increase the application intensity per physical server.

A technology that bundles the resources required to run an application (that is, the application itself, libraries, middleware, etc.) into one package and separates them for each OS to run multiple applications is currently drawing attention.

This technology is called containers.

The biggest feature of containers in IT is that they can be standardized and shipped anywhere, just like containers in the logistics field.

However, Container is an infrastructure that is advantageous for microservices because it is basically one process per container, but the problem is that it becomes complicated.

Containers allow you to build an infrastructure that can accelerate releases and automatically scales to meet your business needs.