前言

• TencentOS Server 3.1(与 CentOS 8用户态完全兼容，配套基于社区5.4 LTS 内核深度优化的 tkernel4版本)

安装 docker-ce

1. 先卸载老版本，没有老版本的跳过

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

2. 安装 yum-utils

   yum install -y yum-utils
   

3. 添加docker-ce.repo

   yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo
   

   PS：更换 Docker CE 仓库镜像 （也可以不更换）
   

4. 安装最新版本

   yum install docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin
   

5. 查看版本

   docker -v
   

6. 启动docker

   systemctl start docker
   

7. 运行 hello-world 镜像

   docker run hello-world
   

设置Docker Hub 镜像缓存

1. 设置 Docker Hub 镜像缓存
   对于使用 systemd 的系统（Ubuntu 16.04+、Debian 8+、CentOS 7）， 在配置文件 /etc/docker/daemon.json 中加入：

   {
     "registry-mirrors": ["https://docker.mirrors.ustc.edu.cn/"]
   }
   

   重新启动 docker：

   systemctl restart docker
   

2. 检查Docker Hub 镜像缓存是否生效
   如果看到了如下内容，说明配置成功。

shell> docker info|grep -A 5 "Registry Mirrors"
 Registry Mirrors:
  https://docker.mirrors.ustc.edu.cn/
 Live Restore Enabled: false

或者

shell> docker info
Client: Docker Engine - Community
 Version:    24.0.4
 Context:    default
 Debug Mode: false
 Plugins:
  buildx: Docker Buildx (Docker Inc.)
    Version:  v0.11.1
    Path:     /usr/libexec/docker/cli-plugins/docker-buildx
  compose: Docker Compose (Docker Inc.)
    Version:  v2.19.1
    Path:     /usr/libexec/docker/cli-plugins/docker-compose
  scan: Docker Scan (Docker Inc.)
    Version:  v0.21.0
    Path:     /usr/libexec/docker/cli-plugins/docker-scan

Server:
 Containers: 1
  Running: 0
  Paused: 0
  Stopped: 1
 Images: 2
 Server Version: 24.0.4
 Storage Driver: overlay2
  Backing Filesystem: extfs
  Supports d_type: true
  Using metacopy: false
  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 runc
 Default Runtime: runc
 Init Binary: docker-init
 containerd version: 3dce8eb055cbb6872793272b4f20ed16117344f8
 runc version: v1.1.7-0-g860f061
 init version: de40ad0
 Security Options:
  seccomp
   Profile: builtin
 Kernel Version: 5.4.119-19-0009.11
 Operating System: TencentOS Server 3.1 (Final)
 OSType: linux
 Architecture: x86_64
 CPUs: 2
 Total Memory: 7.393GiB
 Name: VM-32-4-tencentos
 ID: ec17c509-a153-4e2f-945e-22dcf02d5732
 Docker Root Dir: /var/lib/docker
 Debug Mode: false
 Experimental: false
 Insecure Registries:
  127.0.0.0/8
 Registry Mirrors:
  https://docker.mirrors.ustc.edu.cn/
 Live Restore Enabled: false

参考

https://docs.docker.com/engine/install/centos/
https://mirrors.ustc.edu.cn/help/dockerhub.html
https://mirrors.ustc.edu.cn/