July 27, 2015
Automation of the entire set up and deployment for each and every part/layer of your infrastructure is what means by Immutable Infrastructure. In simplistic terms, what it means is not to change any part of your system once deployed. If the need arises to change it, deploy a new system. Immutable infrastructure and Continuous Deployment work hand in hand. What it focuses on is complete replacement instead of updations in your existing infrastructure to lessen the complexity of deployments. The primary requirement for Immutable Infrastructure is a cloud server and a virtualization technology.
Few of the many benefits that Immutable Infrastructure yields are easy portability to the old version, simplistic production like system on development machines, easy set up of staging systems along with automation, isolated testing of new infrastructure, etc. Continuous Deployment and Immutable Infrastructure together assist in building reliable and high-quality software that is changeable any time and allows you to innovate at a quicker rate.
Today there are umpteen organizations that are moving towards an immutable deployment model which is managed through a container-based Virtualization Technology. Virtualized containers simplify the life for developers, develops and operational staff. Container-based architecture does not follow the typical traditional huge architectures and need not manage, pack, upgrade, migrate, replicate all the time. It makes life simpler to manage immutable deployments of microservices-based architectures.
One of the fastest-growing technologies which handle Immutable Deployments through Virtualization Technology Containers is Docker. The acceptability of Docker has exponentially increased during the last year and has been adopted in some high-end conglomerates. It has been continuously making efforts in enhancing its usability and capabilities.
Docker, a modern deployment container virtualization technology, is a well-established name that allows OS-level virtualization and lets multiple containers execute on the same server. Sounding similar to a hypervisor, it is lightweight as it does not run operating systems but shares the OS of the hosts. Its container is considered portable, which lets you host the application and allows it to be deployed or relocated on any Linux server. The Docker Engine is that part of the technology that looks after the management of containers and application deployment. Docker Hub stores the repository of application. Share your application with your teammates, ship it and run it everywhere. Sounds like magic, isn’t it?
This open-source virtualization technology is one of the most innovative architectures that offers an efficient and lightweight approach to application development. Herein, applications reside inside a container that sits on a single host OS, which can serve multiple containers. It was launched by Solomon Hykes in March 2013 and this technology, at a fast growth pace, has come up with multiple versions and attachments which have been implemented successfully by leading giants including IBM, Microsoft, Google, Amazon and many more.
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