Docker Overview Overview Docker is the organization driving the container movement and the sole container platform provider to address every application over the hybrid cloud. Today's businesses are under great pressure to digitally transform but are controlled by existing applications and infrastructure though rationalizing an ever more diverse portfolio of clouds, datacenters and application architectures. Docker enables right freedom among applications and infrastructure and developers and IT ops to unlock their prospective and creates a product for better collaboration and innovation.
A little intro to LXC: LXC (LinuX Containers) is a OS-level virtualization technology that allows creation and running of multiple isolated Linux virtual environments (VE) about the same control host. These isolation levels or containers can be used to either sandbox specific applications, or even to emulate a completely new host. LXC uses Linux's cgroups functionality, that has been introduced in version 2.6.24 to allow the host CPU to higher partition memory portion into remoteness levels called namespaces. Note that a VE is distinct from an electronic machine (VM), as we will see below. Docker, previously called dotCloud, was started as a part project and only open-sourced in 2013. It is really an extension of LXC's capabilities. This it achieves employing a high-level API that gives a light virtualization solution to perform processes in isolation. Since it's based on LXC, a Docker container does not consist of a separate operating-system, instead it utilizes the operating systems own functionality as supplied by the underlying infrastructure. So Docker acts as a portable container engine, packaging the application and all its dependencies in an electronic container that will operate on any Linux server. Get more info on Docker and Kubernetes Online Training
What's a Container? A container image is a lightweight, stand-alone, executable wrap up of a software program which includes all required to perform it: code, runtime, system tools, system libraries, settings. Designed for Linux and Windows based apps, containerized software will always run exactly the same. Containers isolate software from its surroundings, for instance differences among development and staging environments and lessen conflicts among teams running different software for a passing fancy infrastructure. LIGHTWEIGHT Docker containers running about the same machine share that machine's operating-system kernel; they start instantly and use less compute and RAM. Images are made out of filesystem layers and share common files. This minimizes disk usage and image downloads are much sooner. STANDARD Docker containers draw from from open standards and operate on all major Linux distributions, Microsoft Windows, and on at all infrastructure with VMs, bare-metal and in the cloud. SECURE Docker containers separate applications from one another and from the core infrastructure. Docker offers the strongest default isolation to limit app issues to a single container rather than the entire machine.
Advantages: Modern App Platform The Docker platform is the sole container platform to create, secure and manage the widest array of applications from development to production both on-premises and in the cloud. Docker Community Edition [CE] empowers developers with tools to create applications and Docker Enterprise Edition [EE] provides IT with multi-architecture operations at scale. Docker delivers both a motor for innovation that modernizes without disruption while reducing total costs by significantly more than 50%. Unlike other solutions that specialize in a thin slice of the enterprise IT portfolio, Docker delivers operations at scale by addressing a varied pair of applications and infrastructure for both developers and IT. Simplicity Docker makes potent tools for application creation and orchestration, available to everybody. Openness Built with open source technology and a modular design allows you to integrate into your existing environment.
Independence Docker creates a partition of concerns among developers and IT and among applications and infrastructure to unlock innovation.
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