一步一步安装docker【ubutu】

--下载ubutu linux
64位，3.1内核以上
Docker requires a 64-bit OS and version 3.10 or higher of the Linux kernel.


版本：
Yakkety 16.10  --这里安装16.10 下载地址：http://releases.ubuntu.com/16.10/
Xenial 16.04
Trusty 14.04

--验证内核3.1之上和64位系统
hadoop@node1:~$ uname -r
4.8.0-22-generic
hadoop@node1:~$ uname -a
Linux node1 4.8.0-22-generic #24-Ubuntu SMP Sat Oct 8 09:15:00 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux

--docker安装参考文档
https://store.docker.com/editions/community/docker-ce-server-ubuntu

--安装依赖
hadoop@node1:~$ sudo apt-get -y install  apt-transport-https  ca-certificates  curl
hadoop@node1:~$ curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
hadoop@node1:~$ sudo add-apt-repository \
       "deb [arch=amd64] https://download.docker.com/linux/ubuntu \
       $(lsb_release -cs) \
       stable"
hadoop@node1:~$ sudo apt-get update

--安装docker
hadoop@node1:~$ sudo apt-get -y install docker-ce

--帮助
hadoop@node1:~$ docker --help  

--查看版本
hadoop@node1:~$ docker -v
Docker version 17.03.1-ce, build c6d412e

--运行例子
hadoop@node1:~$ sudo docker run hello-world
Unable to find image 'hello-world:latest' locally
latest: Pulling from library/hello-world
78445dd45222: Pull complete
Digest: sha256:c5515758d4c5e1e838e9cd307f6c6a0d620b5e07e6f927b07d05f6d12a1ac8d7
Status: Downloaded newer image for hello-world:latest

Hello from Docker!
This message shows that your installation appears to be working correctly.

To generate this message, Docker took the following steps:
1. The Docker client contacted the Docker daemon.
2. The Docker daemon pulled the "hello-world" image from the Docker Hub.
3. The Docker daemon created a new container from that image which runs the
    executable that produces the output you are currently reading.
4. The Docker daemon streamed that output to the Docker client, which sent it
    to your terminal.

To try something more ambitious, you can run an Ubuntu container with:
$ docker run -it ubuntu bash

Share images, automate workflows, and more with a free Docker ID:
https://cloud.docker.com/

For more examples and ideas, visit:
https://docs.docker.com/engine/userguide/