docker笔记之安装

docker练习地址
https://labs.play-with-docker.com/
此地址登录后，可以免费使用机器用于docker的练习，每次提供4小时的时间，到期后需要重新登录

1. 查看当前系统版本

cat /etc/redhat-release 
CentOS Linux release 7.4.1708 (Core) 

2. 删除旧版本的docker

yum remove docker 
                  docker-client 
                  docker-client-latest 
                  docker-common 
                  docker-latest 
                  docker-latest-logrotate 
                  docker-logrotate 
                  docker-selinux 
                  docker-engine-selinux 
                  docker-engine

3.修改yum源为阿里源

#删除本地源
rm -fr  /etc/yum.repos.d/*.repo
#下载阿里云源
curl -o /etc/yum.repos.d/CentOS-Base.repo  http://mirrors.aliyun.com/repo/Centos-7.repo
#下载docker源
curl -o /etc/yum.repos.d/docker-ce.repo  https://mirrors.ustc.edu.cn/docker-ce/linux/centos/docker-ce.repo

#将源文件中的地址替换为清华源
sed -i 's#download.docker.com#mirrors.tuna.tsinghua.edu.cn/docker-ce#g' /etc/yum.repos.d/docker-ce.repo

4. 安装docker

yum install docker-ce -y

5.启动docker、设置开机启动，查看docker版本信息

#启动docker
systemctl start docker

#设置开机启动
systemctl enable docker
Created symlink from /etc/systemd/system/multi-user.target.wants/docker.service to /usr/lib/systemd/system/docker.service.

#查看docker信息，由于docker是C/S架构，只有启动docker后才能看到server相关信息
docker version
Client: Docker Engine - Community
 Version:           19.03.1
 API version:       1.40
 Go version:        go1.12.5
 Git commit:        74b1e89
 Built:             Thu Jul 25 21:21:07 2019
 OS/Arch:           linux/amd64
 Experimental:      false

Server: Docker Engine - Community
 Engine:
  Version:          19.03.1
  API version:      1.40 (minimum version 1.12)
  Go version:       go1.12.5
  Git commit:       74b1e89
  Built:            Thu Jul 25 21:19:36 2019
  OS/Arch:          linux/amd64
  Experimental:     false
 containerd:
  Version:          1.2.6
  GitCommit:        894b81a4b802e4eb2a91d1ce216b8817763c29fb
 runc:
  Version:          1.0.0-rc8
  GitCommit:        425e105d5a03fabd737a126ad93d62a9eeede87f
 docker-init:
  Version:          0.18.0
  GitCommit:        fec3683

6.添加阿里云镜像源

# 编辑配置文件/etc/docker/daemon.json
添加镜像地址到字典中
{
  "registry-mirrors": ["https://dhq9bx4f.mirror.aliyuncs.com"]
}