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# # Introduction
Docker This chapter will show you the docker's world.
Docker What is Docker?
What benefits will it bring?
OK, let's start with questions.

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## Docker ## What is Docker
Docker dotCloud Solomon Hykes dotCloud [2013 3 Apache 2.0 ][docker-soft] [GitHub](https://github.com/moby/moby) 上进行维护。Docker 项目后来还加入了 Linux 基金会,并成立推动 [开放容器联盟OCI](https://www.opencontainers.org/)。 Docker is an in-company project launched by Solomon Hykes who is the founder of dotCloud when he was in France, it's a revolution based on dotCloud's years of cloud service experience, and [opened source with Apache 2.0 in 2013.03][docker-soft] maintained in [GitHub](https://github.com/moby/moby). Then, Docker joined the Linux Foundation and promoted [Open Containers Initlative (OCI)](https://www.opencontainers.org/).
Docker 广 [GitHub ](https://github.com/moby/moby) 已经超过 5 万 2 千个星标和一万多个 fork。甚至由于 Docker 项目的火爆,在 2013 年底,[dotCloud 公司决定改名为 Docker](https://blog.docker.com/2013/10/dotcloud-is-becoming-docker-inc/)。Docker 最初是在 Ubuntu 12.04 上开发实现的Red Hat 则从 RHEL 6.5 开始对 Docker 进行支持Google 也在其 PaaS 产品中广泛应用 Docker。 Docker has aroused widespread concern and discussion and had 5.2w stars and 1w forks in it's [GitHub](https://github.com/moby/moby) since it opening source.At the end of 2013, [dotCloud even decided to rename to Docker](https://blog.docker.com/2013/10/dotcloud-is-becoming-docker-inc/) due to the popularity of the project. Docker was developed in Ubuntu 12.04 at the beginning. Red Hat has supported Dokcer since RHEL 6.5. Google also widely applies Docker in its PaaS products.
Docker 使 Google [Go ](https://golang.org/) 进行开发实现,基于 Linux 内核的 [cgroup](https://zh.wikipedia.org/wiki/Cgroups)[namespace](https://en.wikipedia.org/wiki/Linux_namespaces),以及 [AUFS](https://en.wikipedia.org/wiki/Aufs) 类的 [Union FS](https://en.wikipedia.org/wiki/Union_mount) 等技术,对进程进行封装隔离,属于 [操作系统层面的虚拟化技术](https://en.wikipedia.org/wiki/Operating-system-level_virtualization)。由于隔离的进程独立于宿主和其它的隔离的进程,因此也称其为容器。最初实现是基于 [LXC](https://linuxcontainers.org/lxc/introduction/),从 0.7 版本以后开始去除 LXC转而使用自行开发的 [libcontainer](https://github.com/docker/libcontainer),从 1.11 开始,则进一步演进为使用 [runC](https://github.com/opencontainers/runc) 和 [containerd](https://github.com/containerd/containerd)。 Docker develops with [GO](https://golang.org/) launched by Google, based on [cgroup](https://zh.wikipedia.org/wiki/Cgroups) and [namespace](https://en.wikipedia.org/wiki/Linux_namespaces) of Linux Kernel and [Union FS](https://en.wikipedia.org/wiki/Union_mount) like [AUFS](https://en.wikipedia.org/wiki/Aufs) to package and isolate the processes which is belong to [Operating system level virtualization technology](https://en.wikipedia.org/wiki/Operating-system-level_virtualization). It is also called container because of the isolated process is independent of the host and other isolated processes. The initial implementation is based on [LXC](https://linuxcontainers.org/lxc/introduction/). It removed LXC and use [libcontainer](https://github.com/docker/libcontainer) instead which is developed by themself since 0.7. Starting with 1.11, it uses [runC](https://github.com/opencontainers/runc) and [containerd](https://github.com/containerd/containerd) further.
Docker 使 Docker 便 Docker is further packaged on a container basis, from file system, network interconnection to process isolation, etc, greatly simplifying container craetion and maintenance.
Docker 宿便 The images below compare the differences between Docker and Traditional Virtualization. The traditional Virtual machine technology is to virtualize a set of hadware to run a complete operation system and run the required application process on this system. The application process in the container runs directly on the host kernel, and the container does not have its own Kernel and hadware virtualiztion. Therefore, container are lighter than traditional virtual machines.
![](_images/virtualization.png) ![Traditional Virtualization](_images/virtualization.png)
![Docker](_images/docker.png) ![Docker](_images/docker.png)