Centos7下安装docker

Centos7 yum在线安装docker 20.10.2

参考文献

• 官方
• 博客

查看安装环境

• 确定CentOS7及以上版本

  $ sudo cat /etc/redhat-release
  CentOS Linux release 7.6.1810 (Core) 
  

卸载old版本（请参考官方文档）

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

更新yum源

yum update

安装需要的软件包（请参考官方文档）

sudo yum install -y yum-utils

安装设置stable镜像仓库

# 阿里云镜像
sudo yum-config-manager \
       --add-repo \
       http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
# 官方文档（国外镜像较慢，不建议）
$ sudo yum-config-manager \
    --add-repo \
    https://download.docker.com/linux/centos/docker-ce.repo

更新yum软件包索引

sudo yum makecache fast

安装DOCKER CE

sudo yum install -y docker-ce

启动测试docker

# 启动
sudo systemctl start docker

# 验证
sudo docker version

Client: Docker Engine - Community
 Version:           20.10.2
 API version:       1.41
 Go version:        go1.13.15
 Git commit:        2291f61
 Built:             Mon Dec 28 16:17:48 2020
 OS/Arch:           linux/amd64
 Context:           default
 Experimental:      true

Server: Docker Engine - Community
 Engine:
  Version:          20.10.2
  API version:      1.41 (minimum version 1.12)
  Go version:       go1.13.15
  Git commit:       8891c58
  Built:            Mon Dec 28 16:16:13 2020
  OS/Arch:          linux/amd64
  Experimental:     false
 containerd:
  Version:          1.4.3
  GitCommit:        269548fa27e0089a8b8278fc4fc781d7f65a939b
 runc:
  Version:          1.0.0-rc92
  GitCommit:        ff819c7e9184c13b7c2607fe6c30ae19403a7aff
 docker-init:
  Version:          0.19.0
  GitCommit:        de40ad0

卸载(请参考官方文档)

# 停止进程
$ sudo systemctl stop docker
# 卸载docker
$ sudo yum remove docker-ce docker-ce-cli containerd.io
# 删除文件
$ sudo rm -rf /var/lib/docker

配置阿里云/网易云镜像加速

• 目的

  未配置镜像加速的情况下，默认镜像下载的远程仓库https://hub.docker.com/，国外仓库地址较慢，

  配置阿里云镜像加速https://cr.console.aliyun.com/cn-hangzhou/new可以提高速度

  如 我的账号

• 注册账号

  从https://dev.aliyun.com/search.html注册账号，可以使用淘宝账号，获取加速地址，然后按阿里云的操作文档执行，大致如下

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

• 确认是否成功

  docker info
  ...........
   Name: localhost.localdomain
   ID: 3R33:2O4Y:RPEO:6X63:OFQ6:YBIP:CURH:TJUC:6K7U:WZCU:RDQV:DQRI
   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:
   ## 表示成功
  https://xxxx.mirror.aliyuncs.com/
   Live Restore Enabled: false
  

错误

Loading mirror speeds from cached hostfile
 * base: mirrors.bfsu.edu.cn
 * centos-sclo-rh: mirrors.aliyun.com
 * centos-sclo-sclo: mirrors.aliyun.com
 * extras: mirrors.aliyun.com
 * updates: mirrors.aliyun.com
No package docker-ce available.
No package docker-ce-cli available.
No package containerd.io available.
Error: Nothing to do

执行 yum update

未测试