Centos7部署Docker

参考https://blog.youkuaiyun.com/qq_39093474/article/details/130632077

1 确认系统版本

cat /etc/redhat-release

 2 卸载旧版本

 yum remove docker

3 yum安装gcc相关

yum -y install gcc
yum -y install gcc-c++

 4 安装需要的软件包

yum install -y yum-utils

 5 配置阿里的docker-ceyum源

yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo

 yum-config-manager命令作用是添加yum源。
敲完命令之后大家执行一下命令去看一下有没有配置成功。

cd /etc/yum.repos.d
ls

 有docker-ce.repo就代表配置成功了。

6 更新yum软件包索引

yum makecache fast

 7 安装docker

yum -y install docker-ce docker-ce-cli containerd.io

8 启动docker

systemctl start docker

9 测试

docker version

提示版本号是部署成功。

10 测试

[root@localhost prometheus]# docker run hello-world

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/

 异常情况

 解决办法修改/etc/docker/daemon.json 文件

//1)在/etc/docker文件夹下执行：
sudo touch daemon.json

//2)修改/etc/docker/daemon.json 文件权限
chmod 777 daemon.json

//3)daemon.json文件中写入如下内容：
------------------
{ 
"registry-mirrors": ["https://alzgoonw.mirror.aliyuncs.com"] 
}

 重启docker之后就可以

 //重启docker systemctl restart docker

//查看状态 systemctl status docker

 再次执行docker run hello-world

11 卸载

systemctl stop docker
yum remove docker-ce docker-ce-cli containerd.io
rm -rf /var/lib/docker
rm -rf /var/lib/containerd