Ubuntu安装Docker ce流程

实际操作中发现，Docker对32位系统支持并不好，对于Win10自带的ubuntu貌似也会出一点问题。尝试之后本人决定使用Ubuntu 16.04。

1. 准备工作

卸载旧版本：

$ sudo apt-get remove docker
docker-engine
docker.io

Ubuntu 14.04 可选内核模块(16.04版本无需本步)：

$ sudo apt-get update

$ sudo apt-get install
linux-image-extra-$(uname -r)
linux-image-extra-virtual

2. 使用 APT安装

添加https传输支持：

$ sudo apt-get update

$ sudo apt-get install \
apt-transport-https \
ca-certificates \
curl \
software-properties-common

$ curl -fsSL https://mirrors.ustc.edu.cn/docker-ce/linux/ubuntu/gpg | sudo apt-key add -

向 source.list 中添加 Docker 软件源：

sudo add-apt-repository \
“deb [arch=amd64] https://mirrors.ustc.edu.cn/docker-ce/linux/ubuntu \
$(lsb_release -cs) \
stable”

3. 安装 Docker CE

$ sudo apt-get update

$ sudo apt-get install docker-ce

4. 启动docker-ce

$ sudo systemctl enable docker
$ sudo systemctl start docker

如果是14.04，使用以下命令启动：

$ sudo service docker start

5. 建立 docker 用户组

$ sudo groupadd docker
$ sudo usermod -aG docker $USER

6. 测试 Docker 是否安装正确

$ sudo docker run hello-world

Unable to find image ‘hello-world:latest’ locally
latest: Pulling from library/hello-world
ca4f61b1923c: Pull complete
Digest: sha256:be0cd392e45be79ffeffa6b05338b98ebb16c87b255f48e297ec7f98e123905c
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:

The Docker client contacted the Docker daemon.

The Docker daemon pulled the “hello-world” image from the Docker Hub.
(amd64)

The Docker daemon created a new container from that image which runs the
executable that produces the output you are currently reading.

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/
如果出现以上界面，说明安装成功。

6. 镜像加速

ubuntu 14.04:
编辑 /etc/default/docker 文件，在其中的 DOCKER_OPTS 中配置加速器地址,然后重新启动：

DOCKER_OPTS=”–registry-mirror=https://registry.docker-cn.com"
$ sudo service docker restart
ubuntu 16.04:
对于使用 systemd 的系统，请在 /etc/docker/daemon.json 中写入如下内容（如果文件不存在请新建该文件）:
{
“registry-mirrors”: [
```
"https://registry.docker-cn.com"
```
]
}

之后重新启动服务:

$ sudo systemctl daemon-reload
$ sudo systemctl restart docker