在 centos7.2安装docker 并设置阿里云源

现在docker 在原来的基础上分为两个分支版本: Docker CE 和 Docker EE。Docker CE 即社区免费版，Docker EE 即企业版，需付费使用。个人使用Docker CE 好了

删除系统就的docker组件

[root@host01 ~]# yum remove -y docker \
docker-client docker-client-latest \
docker-common docker-latest \
docker-latest-logrotate \
docker-logrotate docker-selinux \
docker-engine-selinux docker-engine
已加载插件：fastestmirror
参数 docker 没有匹配
参数 docker-client 没有匹配
参数 docker-client-latest 没有匹配
参数 docker-common 没有匹配
参数 docker-latest 没有匹配
参数 docker-latest-logrotate 没有匹配
参数 docker-logrotate 没有匹配
参数 docker-selinux 没有匹配
参数 docker-engine-selinux 没有匹配
参数 docker-engine 没有匹配
不删除任何软件包
[root@host01 ~]# 

安装一些依赖

[root@host01 ~]# yum install -y yum-utils device-mapper-persistent-data lvm2

添加docker的源

[root@host01 ~]# yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo
已加载插件：fastestmirror
adding repo from: https://download.docker.com/linux/centos/docker-ce.repo
grabbing file https://download.docker.com/linux/centos/docker-ce.repo to /etc/yum.repos.d/docker-ce.repo
repo saved to /etc/yum.repos.d/docker-ce.repo
[root@host01 ~]# 

安装docker-ce

[root@host01 ~]# yum install -y docker-ce

启动docker

[root@host01 ~]# systemctl start docker

验证docker

[root@host01 ~]# docker run hello-world
Unable to find image 'hello-world:latest' locally
latest: Pulling from library/hello-world
1b930d010525: Pull complete 
Digest: sha256:f9dfddf63636d84ef479d645ab5885156ae030f611a56f3a7ac7f2fdd86d7e4e
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.
    (amd64)
 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://hub.docker.com/

For more examples and ideas, visit:
 https://docs.docker.com/get-started/

[root@host01 ~]#

配置阿里云的源

1、要先注册一个阿里云的账号然后登陆到阿里云的【容器镜像服务】页面，地址：
阿里云容器镜像服务
2、在下面截图处找到加速器地址
3、复制阿里云上提供的直接命令直接运行即可

sudo mkdir -p /etc/docker
sudo tee /etc/docker/daemon.json <<-'EOF'
{
  "registry-mirrors": ["https://xxx.mirror.aliyuncs.com"]
}
EOF
sudo systemctl daemon-reload
sudo systemctl restart docker