[系统运维]CentOS 7 如何安装Docker

环境（CentOS 7）

[root@iZwz9alf1aw4oedae4m804Z yum.repos.d]# uname -r
3.10.0-1160.31.1.el7.x86_64
[root@iZwz9alf1aw4oedae4m804Z yum.repos.d]# cat /etc/os-release 
NAME="CentOS Linux"
VERSION="7 (Core)"
ID="centos"
ID_LIKE="rhel fedora"
VERSION_ID="7"
PRETTY_NAME="CentOS Linux 7 (Core)"
ANSI_COLOR="0;31"
CPE_NAME="cpe:/o:centos:centos:7"
HOME_URL="https://www.centos.org/"
BUG_REPORT_URL="https://bugs.centos.org/"

CENTOS_MANTISBT_PROJECT="CentOS-7"
CENTOS_MANTISBT_PROJECT_VERSION="7"
REDHAT_SUPPORT_PRODUCT="centos"
REDHAT_SUPPORT_PRODUCT_VERSION="7"

安装依赖

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

安装工具包

sudo yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo

安装之前，清理下缓存

yum makecache fast

开始安装

sudo yum install docker-ce docker-ce-cli containerd.io

后面一致输入y就是了

成功后会显示

Installed:
  containerd.io.x86_64 0:1.4.9-3.1.el7            docker-ce.x86_64 3:20.10.8-3.el7            docker-ce-cli.x86_64 1:20.10.8-3.el7           

Dependency Installed:
  audit-libs-python.x86_64 0:2.8.5-4.el7           checkpolicy.x86_64 0:2.5-8.el7          container-selinux.noarch 2:2.119.2-1.911c772.el7_8
  docker-ce-rootless-extras.x86_64 0:20.10.8-3.el7 docker-scan-plugin.x86_64 0:0.8.0-3.el7 fuse-overlayfs.x86_64 0:0.7.2-6.el7_8             
  fuse3-libs.x86_64 0:3.6.1-4.el7                  libcgroup.x86_64 0:0.41-21.el7          libsemanage-python.x86_64 0:2.5-14.el7            
  policycoreutils-python.x86_64 0:2.5-34.el7       python-IPy.noarch 0:0.75-6.el7          setools-libs.x86_64 0:3.3.8-4.el7                 
  slirp4netns.x86_64 0:0.4.3-4.el7_8              

Complete!

启动并测试

sudo systemctl start docker

输入 docker version 显示如下，则安装成功

Client: Docker Engine - Community
 Version:           20.10.8
 API version:       1.41
 Go version:        go1.16.6
 Git commit:        3967b7d
 Built:             Fri Jul 30 19:55:49 2021
 OS/Arch:           linux/amd64
 Context:           default
 Experimental:      true

Server: Docker Engine - Community
 Engine:
  Version:          20.10.8
  API version:      1.41 (minimum version 1.12)
  Go version:       go1.16.6
  Git commit:       75249d8
  Built:            Fri Jul 30 19:54:13 2021
  OS/Arch:          linux/amd64
  Experimental:     false
 containerd:
  Version:          1.4.9
  GitCommit:        e25210fe30a0a703442421b0f60afac609f950a3
 runc:
  Version:          1.0.1
  GitCommit:        v1.0.1-0-g4144b63
 docker-init:
  Version:          0.19.0
  GitCommit:        de40ad0

完成?