一、登录阿里云控制台

  登录阿里云后，搜索 容器镜像服务 ，如下图：

二、配置daemon.json

  登录你的阿里云服务器，执行以下脚本，意思就是把镜像加速器的地址配置到 /etc/docker/daemon.json ，当然你不习惯的话，使用 vim /etc/docker/daemon.json 创建编辑也可以的。

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

  注意哦，我这里的 https://xxxxxxxx.mirror.aliyuncs.com 这里要改成你自己的阿里云镜像加速器的地址也就是我上一步图示中的地址，接下里重新加载配置并重启docker，执行脚本如下：

#重新加载配置文件
sudo systemctl daemon-reload
#重启docker
sudo systemctl restart docker

三、查看docker info

  怎么看呢？我们可以通过 docker info 查看我们的配置是否生效了。

#查看docker信息
docker info

运行结果：

Client:
 Context:    default
 Debug Mode: false
 Plugins:
  app: Docker App (Docker Inc., v0.9.1-beta3)
  buildx: Build with BuildKit (Docker Inc., v0.6.3-docker)
  scan: Docker Scan (Docker Inc., v0.12.0)

Server:
 Containers: 0
  Running: 0
  Paused: 0
  Stopped: 0
 Images: 0
 Server Version: 20.10.9
 Storage Driver: overlay2
  Backing Filesystem: xfs
  Supports d_type: true
  Native Overlay Diff: true
  userxattr: false
 Logging Driver: json-file
 Cgroup Driver: cgroupfs
 Cgroup Version: 1
 Plugins:
  Volume: local
  Network: bridge host ipvlan macvlan null overlay
  Log: awslogs fluentd gcplogs gelf journald json-file local logentries splunk syslog
 Swarm: inactive
 Runtimes: io.containerd.runc.v2 io.containerd.runtime.v1.linux runc
 Default Runtime: runc
 Init Binary: docker-init
 containerd version: 7b11cfaabd73bb80907dd23182b9347b4245eb5d
 runc version: v1.0.2-0-g52b36a2
 init version: de40ad0
 Security Options:
  seccomp
   Profile: default
 Kernel Version: 4.18.0-305.19.1.el8_4.x86_64
 Operating System: CentOS Linux 8
 OSType: linux
 Architecture: x86_64
 CPUs: 2
 Total Memory: 3.649GiB
 Name: iZwz95ftzhfl9qi3l12ckaZ
 ID: 2R3N:ORPQ:WO2D:N7DS:CQSD:EJMD:BQMX:VXDW:FVC4:VWII:3CFN:MCFH
 Docker Root Dir: /var/lib/docker
 Debug Mode: false
 Registry: https://index.docker.io/v1/
 Labels:
 Experimental: false
 Insecure Registries:
  127.0.0.0/8
 Registry Mirrors:
  https://xxxxxxxx.mirror.aliyuncs.com/
 Live Restore Enabled: false

  结果的倒数第二行，我们看到Docker镜像仓库的地址了。

四、测试下载

  我们通过 docker 下载 mysql-8.0.28 ，具体的版本需要去官网查看 https://hub.docker.com/_/mysql?tab=tags

#下载mysql-8.0.28
docker pull mysql:8.0.28

运行结果：

8.0.28: Pulling from library/mysql
6552179c3509: Pull complete 
d69aa66e4482: Pull complete 
3b19465b002b: Pull complete 
7b0d0cfe99a1: Pull complete 
9ccd5a5c8987: Pull complete 
2dab00d7d232: Pull complete 
64d3afdccd4a: Pull complete 
82148d50b16c: Pull complete 
8bb7d73a7d0c: Pull complete 
74778cd68a75: Pull complete 
d7e5f9309140: Pull complete 
f2e376ecd59f: Pull complete 
Digest: sha256:92d27b8222bbcf53bc42c70ca7cd1010d6c0527efc61f14980ce77c50932bef4
Status: Downloaded newer image for mysql:8.0.28
docker.io/library/mysql:8.0.28

  确实比官网下载快多了，我们可以通过 docker images 查看我们刚下载的镜像

#查看镜像
docker images

运行结果：

REPOSITORY   TAG       IMAGE ID       CREATED       SIZE
mysql        8.0.28    d1dc36cf8d9e   3 weeks ago   519MB