一、安装前必读
3.卸载旧版本（如果之前安装过的话）
安装Docker的详细步骤
一、安装前必读
在安装 Docker 之前，先说一下配置，我这里是Centos7
Linux 内核：官方建议 3.10 以上，3.8以上貌似也可。
注意：本文的命令使用的是 root 用户登录执行，不是 root 的话所有命令前面要加 sudo
1.查看当前的内核版本
命令：uname -r
我这里是4.19.x，满足条件。
2.使用 root 权限更新 yum 包（生产环境中此步操作需慎重，看自己情况，学习的话随便搞）
命令:yum -y update
[root@qbi-driver-01 ~]# yum -y update
Loaded plugins: fastestmirror, langpacks, releasever-adapter, update-motd
Loading mirror speeds from cached hostfile
Resolving Dependencies
--> Running transaction check
---> Package docker-ce.x86_64 0:18.03.1.ce-1.el7.centos will be updated
---> Package docker-ce.x86_64 3:20.10.15-3.el7 will be an update
--> Processing Dependency: containerd.io >= 1.4.1 for package: 3:docker-ce-20.10.15-3.el7.x86_64
--> Processing Dependency: docker-ce-cli for package: 3:docker-ce-20.10.15-3.el7.x86_64
--> Processing Dependency: docker-ce-rootless-extras for package: 3:docker-ce-20.10.15-3.el7.x86_64
--> Running transaction check
---> Package containerd.io.x86_64 0:1.6.4-3.1.el7 will be installed
---> Package docker-ce-cli.x86_64 1:20.10.15-3.el7 will be installed
--> Processing Dependency: docker-scan-plugin(x86-64) for package: 1:docker-ce-cli-20.10.15-3.el7.x86_64
---> Package docker-ce-rootless-extras.x86_64 0:20.10.15-3.el7 will be installed
--> Processing Dependency: fuse-overlayfs >= 0.7 for package: docker-ce-rootless-extras-20.10.15-3.el7.x86_64
--> Running transaction check
---> Package docker-scan-plugin.x86_64 0:0.17.0-3.el7 will be installed
---> Package fuse-overlayfs.x86_64 0:0.7.2-6.2.al7 will be installed
--> Processing Dependency: libfuse3.so.3(FUSE_3.2)(64bit) for package: fuse-overlayfs-0.7.2-6.2.al7.x86_64
--> Processing Dependency: libfuse3.so.3(FUSE_3.0)(64bit) for package: fuse-overlayfs-0.7.2-6.2.al7.x86_64
--> Processing Dependency: libfuse3.so.3()(64bit) for package: fuse-overlayfs-0.7.2-6.2.al7.x86_64
--> Running transaction check
---> Package fuse3-libs.x86_64 0:3.6.1-2.el7 will be installed
--> Finished Dependency Resolution
Dependencies Resolved
===============================================================================
Package Arch Version Repository Size
===============================================================================
Updating:
docker-ce x86_64 3:20.10.15-3.el7 docker-ce-stable 22 M
Installing for dependencies:
containerd.io x86_64 1.6.4-3.1.el7 docker-ce-stable 33 M
docker-ce-cli x86_64 1:20.10.15-3.el7 docker-ce-stable 29 M
docker-ce-rootless-extras x86_64 20.10.15-3.el7 docker-ce-stable 8.2 M
docker-scan-plugin x86_64 0.17.0-3.el7 docker-ce-stable 3.7 M
fuse-overlayfs x86_64 0.7.2-6.2.al7 extras 55 k
fuse3-libs x86_64 3.6.1-2.el7 epel 82 k
Transaction Summary
===============================================================================
Install ( 6 Dependent packages)
Upgrade 1 Package
Total download size: 97 M
Downloading packages:
Delta RPMs disabled because /usr/bin/applydeltarpm not installed.
(1/7): docker-ce-20.10.15-3.el7.x86_64.rpm | 22 MB 00:02
(2/7): containerd.io-1.6.4-3.1.el7.x86_64.rpm | 33 MB 00:04
(3/7): docker-ce-rootless-extras-20.10.15-3.el7.x86_64.rp | 8.2 MB 00:01
(4/7): fuse-overlayfs-0.7.2-6.2.al7.x86_64.rpm | 55 kB 00:00
(5/7): fuse3-libs-3.6.1-2.el7.x86_64.rpm | 82 kB 00:00
(6/7): docker-ce-cli-20.10.15-3.el7.x86_64.rpm | 29 MB 00:04
(7/7): docker-scan-plugin-0.17.0-3.el7.x86_64.rpm | 3.7 MB 00:00
-------------------------------------------------------------------------------
Total 14 MB/s | 97 MB 00:06
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
Installing : docker-scan-plugin-0.17.0-3.el7.x86_64 1/8
Installing : 1:docker-ce-cli-20.10.15-3.el7.x86_64 2/8
Installing : containerd.io-1.6.4-3.1.el7.x86_64 3/8
Installing : fuse3-libs-3.6.1-2.el7.x86_64 4/8
Installing : fuse-overlayfs-0.7.2-6.2.al7.x86_64 5/8
Installing : docker-ce-rootless-extras-20.10.15-3.el7.x86_64 6/8
Updating : 3:docker-ce-20.10.15-3.el7.x86_64 7/8
Cleanup : docker-ce-18.03.1.ce-1.el7.centos.x86_64 8/8
Verifying : 1:docker-ce-cli-20.10.15-3.el7.x86_64 1/8
Verifying : fuse3-libs-3.6.1-2.el7.x86_64 2/8
Verifying : docker-ce-rootless-extras-20.10.15-3.el7.x86_64 3/8
Verifying : containerd.io-1.6.4-3.1.el7.x86_64 4/8
Verifying : docker-scan-plugin-0.17.0-3.el7.x86_64 5/8
Verifying : 3:docker-ce-20.10.15-3.el7.x86_64 6/8
Verifying : fuse-overlayfs-0.7.2-6.2.al7.x86_64 7/8
Verifying : docker-ce-18.03.1.ce-1.el7.centos.x86_64 8/8
Dependency Installed:
containerd.io.x86_64 0:1.6.4-3.1.el7
docker-ce-cli.x86_64 1:20.10.15-3.el7
docker-ce-rootless-extras.x86_64 0:20.10.15-3.el7
docker-scan-plugin.x86_64 0:0.17.0-3.el7
fuse-overlayfs.x86_64 0:0.7.2-6.2.al7
fuse3-libs.x86_64 0:3.6.1-2.el7
Updated:
docker-ce.x86_64 3:20.10.15-3.el7
Complete!
这个命令不是必须执行的，看个人情况，后面出现不兼容的情况的话就必须update了
注意
yum -y update：升级所有包同时也升级软件和系统内核；
yum -y upgrade：只升级所有包，不升级软件和系统内核
3.卸载旧版本（如果之前安装过的话）
命令：yum remove docker docker-common docker-selinux docker-engine
[root@qbi-driver-01 ~]# yum remove docker docker-common docker-selinux docker-engine
Loaded plugins: fastestmirror, langpacks, releasever-adapter, update-motd
No Match for argument: docker
No Match for argument: docker-common
No Match for argument: docker-engine
Resolving Dependencies
--> Running transaction check
---> Package container-selinux.noarch 2:2.107-3.1.al7 will be erased
--> Processing Dependency: container-selinux >= 2:2.74 for package: 3:docker-ce-20.10.15-3.el7.x86_64
--> Processing Dependency: container-selinux >= 2:2.74 for package: containerd.io-1.6.4-3.1.el7.x86_64
--> Running transaction check
---> Package containerd.io.x86_64 0:1.6.4-3.1.el7 will be erased
---> Package docker-ce.x86_64 3:20.10.15-3.el7 will be erased
--> Processing Dependency: docker-ce for package: docker-ce-rootless-extras-20.10.15-3.el7.x86_64
--> Running transaction check
---> Package docker-ce-rootless-extras.x86_64 0:20.10.15-3.el7 will be erased
--> Finished Dependency Resolution
Dependencies Resolved
===============================================================================
Package Arch Version Repository Size
===============================================================================
Removing:
container-selinux noarch 2:2.107-3.1.al7 @extras 40 k
Removing for dependencies:
containerd.io x86_64 1.6.4-3.1.el7 @docker-ce-stable 125 M
docker-ce x86_64 3:20.10.15-3.el7 @docker-ce-stable 95 M
docker-ce-rootless-extras x86_64 20.10.15-3.el7 @docker-ce-stable 19 M
Transaction Summary
===============================================================================
Remove 1 Package (+3 Dependent packages)
Installed size: 239 M
Is this ok [y/N]: Y
Downloading packages:
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
Erasing : 3:docker-ce-20.10.15-3.el7.x86_64 1/4
Erasing : docker-ce-rootless-extras-20.10.15-3.el7.x86_64 2/4
Erasing : containerd.io-1.6.4-3.1.el7.x86_64 3/4
Erasing : 2:container-selinux-2.107-3.1.al7.noarch 4/4
Verifying : 2:container-selinux-2.107-3.1.al7.noarch 1/4
Verifying : docker-ce-rootless-extras-20.10.15-3.el7.x86_64 2/4
Verifying : containerd.io-1.6.4-3.1.el7.x86_64 3/4
Verifying : 3:docker-ce-20.10.15-3.el7.x86_64 4/4
Removed:
container-selinux.noarch 2:2.107-3.1.al7
Dependency Removed:
containerd.io.x86_64 0:1.6.4-3.1.el7
docker-ce.x86_64 3:20.10.15-3.el7
docker-ce-rootless-extras.x86_64 0:20.10.15-3.el7
Complete!
安装Docker的详细步骤
1.安装需要的软件包， yum-util 提供yum-config-manager功能，另两个是devicemapper驱动依赖
命令：yum install -y yum-utils device-mapper-persistent-data lvm2
这里是以及下载好的
2.设置 yum 源
设置一个yum源，下面两个都可用
yum-config-manager --add-repo http://download.docker.com/linux/centos/docker-ce.repo（中央仓库）
yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo（阿里仓库）
3.选择docker版本并安装
（1）查看可用版本有哪些
yum list docker-ce --showduplicates | sort -r
（2）选择一个版本并安装：yum install docker-ce-版本号
yum -y install docker-ce-18.03.1.ce
出现下图说明安装成功
4.启动 Docker 并设置开机自启
systemctl start docker
systemctl enable docker
查看docker版本
原文链接：https://blog.csdn.net/qq_43674360/article/details/124674846
