一、创建daemon.json文件

sudo touch /etc/docker/daemon.json

二、在daemon文件中增加如下内容

{
    "registry-mirrors": [
        "https://docker.mirrors.ustc.edu.cn",
        "https://hub-mirror.c.163.com",
        "https://registry.docker-cn.com"
    ]
}

如果与有速度上特殊要求，可自行在阿里云中申请个人加速源

三、重启Docker

sudo systemctl restart docker

四、查看Docker信息

docker info

查看详细信息

root@node01:~# docker info
Client:
 Context:    default
 Debug Mode: false
 Plugins:
  app: Docker App (Docker Inc., v0.9.1-beta3)
  buildx: Build with BuildKit (Docker Inc., v0.5.1-docker)

Server:
 Containers: 1
  Running: 0
  Paused: 0
  Stopped: 1
 Images: 8
 Server Version: 20.10.3
 Storage Driver: overlay2
  Backing Filesystem: extfs
  Supports d_type: true
  Native Overlay Diff: true
 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: runc io.containerd.runc.v2 io.containerd.runtime.v1.linux
 Default Runtime: runc
 Init Binary: docker-init
 containerd version: 269548fa27e0089a8b8278fc4fc781d7f65a939b
 runc version: ff819c7e9184c13b7c2607fe6c30ae19403a7aff
 init version: de40ad0
 Security Options:
  apparmor
  seccomp
   Profile: default
 Kernel Version: 5.4.0-66-generic
 Operating System: Ubuntu 20.04.2 LTS
 OSType: linux
 Architecture: x86_64
 CPUs: 1
 Total Memory: 1.913GiB
 Name: node01
 ID: UJKF:FGCM:V7ZK:ZCHV:TGE3:SWAL:FAVC:WMIE:XO5Q:EPE2:AHS3:IGMD
 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://docker.mirrors.ustc.edu.cn/
  https://hub-mirror.c.163.com/
  https://registry.docker-cn.com/
 Live Restore Enabled: false

WARNING: No swap limit support
WARNING: No blkio weight support
WARNING: No blkio weight_device support