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Merge branch 'master' into english

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Kang Huaishuai
2019-09-01 19:58:45 +08:00
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introduction/what.md
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@@ -6,6 +6,12 @@ Docker has aroused widespread concern and discussion and had 5.2w stars and 1w f
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 Architecture](https://docs.microsoft.com/en-us/virtualization/windowscontainers/deploy-containers/media/docker-on-linux.png)
> `runc` is a Linux command-line tool for creating and running containers according to the [OCI container runtime specification](https://github.com/opencontainers/runtime-spec).
> `containerd` is a daemon that manages container life cycle from downloading and unpacking the container image to container execution and supervision.
Docker is further packaged on a container basis, from file system, network interconnection to process isolation, etc, greatly simplifying container craetion and maintenance.
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.
@@ -14,6 +20,4 @@ The images below compare the differences between Docker and Traditional Virtuali
![Docker](_images/docker.png)
[docker-soft]:https://en.wikipedia.org/wiki/Docker_(software)