本文最后更新于1 分钟前，文中所描述的信息可能已发生改变。
说明
Docker分为社区版和企业版，功能方面社区版是足够使用了。
CentOS 7 安装docker 社区版
我这里默认使用的root权限登陆的，非root用户的话，需要切换到root，自己的服务器，就没必要单独搞个用户了。
1、前置要求：
Docker要求 CentOS 系统的内核版本高于 3.10 ，查看本页面的前提条件来验证你的CentOS 版本是否支持 Docker 。通过 uname -r 命令查看你当前的内核版本
shell
[root@VM-16-4-centos ssh]# uname -r
3.10.0-1160.45.1.el7.x86_64满足要求
2、更新yum，保证所有包最新状态
[root@VM-16-4-centos ssh]# yum update
Dependencies Resolved
==========================================================================================
Package Arch
==========================================================================================
Installing:
kernel x86_64
kernel-devel x86_64
Updating:
bash x86_64
bind-export-libs x86_64
bind-libs x86_64
bind-libs-lite x86_64
bind-license noarch
bind-utils x86_64
bpftool x86_64
centos-release x86_64
iscsi-initiator-utils x86_64
iscsi-initiator-utils-iscsiuio x86_64
kbd x86_64
kbd-legacy noarch
kbd-misc noarch
kernel-headers x86_64
kernel-tools x86_64
kernel-tools-libs x86_64
krb5-devel x86_64
krb5-libs x86_64
libkadm5 x86_64
libsss_idmap x86_64
libsss_nss_idmap x86_64
nss x86_64
nss-sysinit x86_64
nss-tools x86_64
python-perf x86_64
rpm x86_64
rpm-build x86_64
rpm-build-libs x86_64
rpm-libs x86_64
rpm-python x86_64
sssd-client x86_64
Transaction Summary
==========================================================================================
Install 2 Packages
Upgrade 31 Packages
Total download size: 122 M
Is this ok [y/d/N]: y要更新的还蛮多的，这里直接选是，等待更新完毕。
3、卸载已经安装的docker（如果是重装，需要这一步）
[root@VM-16-4-centos ssh]# yum remove docker docker-common docker-selinux docker-engine4、安装必要的一些系统工具
[root@VM-16-4-centos ssh]# yum install -y yum-utils device-mapper-persistent-data lvm25、添加阿里云的软件源信息
[root@VM-16-4-centos ssh]# yum-config-manager --add-repo https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
Loaded plugins: fastestmirror, langpacks
adding repo from: https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
grabbing file https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo to /etc/yum.repos.d/docker-ce.repo
repo saved to /etc/yum.repos.d/docker-ce.repo
[root@VM-16-4-centos ssh]# sed -i 's+download.docker.com+mirrors.aliyun.com/docker-ce+' /etc/yum.repos.d/docker-ce.repo
[root@VM-16-4-centos ssh]# yum makecache fast #生成yum本地缓存
Loaded plugins: fastestmirror, langpacks
Loading mirror speeds from cached hostfile
docker-ce-stable
epel
extras
os
updates
(1/2): docker-ce-stable/7/x86_64/primary_db
(2/2): docker-ce-stable/7/x86_64/updateinfo
Metadata Cache Created
[root@VM-16-4-centos ssh]#6、安装docker (
[root@VM-16-4-centos ssh]# yum -y install docker-ce7、指定docker版本安装
yum list docker-ce.x86_64 --showduplicates | sort -r
#查找Docker-CE的版本:
[root@VM-16-4-centos ssh]# yum list docker-ce.x86_64 --showduplicates | sort -r
Loading mirror speeds from cached hostfile
Loaded plugins: fastestmirror, langpacks
Installed Packages
docker-ce.x86_64 3:20.10.9-3.el7 docker-ce-stable
docker-ce.x86_64 3:20.10.8-3.el7 docker-ce-stable
docker-ce.x86_64 3:20.10.7-3.el7 docker-ce-stable
docker-ce.x86_64 3:20.10.6-3.el7 docker-ce-stable
docker-ce.x86_64 3:20.10.5-3.el7 docker-ce-stable
docker-ce.x86_64 3:20.10.4-3.el7 docker-ce-stable
docker-ce.x86_64 3:20.10.3-3.el7 docker-ce-stable
docker-ce.x86_64 3:20.10.2-3.el7 docker-ce-stable
docker-ce.x86_64 3:20.10.1-3.el7 docker-ce-stable
docker-ce.x86_64 3:20.10.12-3.el7 docker-ce-stable
docker-ce.x86_64 3:20.10.12-3.el7 @docker-ce-stable
docker-ce.x86_64 3:20.10.11-3.el7 docker-ce-stable
docker-ce.x86_64 3:20.10.10-3.el7 docker-ce-stable
docker-ce.x86_64 3:20.10.0-3.el7 docker-ce-stable
docker-ce.x86_64 3:19.03.9-3.el7 docker-ce-stable
docker-ce.x86_64 3:19.03.8-3.el7 docker-ce-stable
docker-ce.x86_64 3:19.03.7-3.el7 docker-ce-stable
docker-ce.x86_64 3:19.03.6-3.el7 docker-ce-stable
docker-ce.x86_64 3:19.03.5-3.el7 docker-ce-stable
docker-ce.x86_64 3:19.03.4-3.el7 docker-ce-stable
docker-ce.x86_64 3:19.03.3-3.el7 docker-ce-stable
docker-ce.x86_64 3:19.03.2-3.el7 docker-ce-stable
docker-ce.x86_64 3:19.03.15-3.el7 docker-ce-stable
docker-ce.x86_64 3:19.03.14-3.el7 docker-ce-stable
docker-ce.x86_64 3:19.03.1-3.el7 docker-ce-stable
docker-ce.x86_64 3:19.03.13-3.el7 docker-ce-stable
docker-ce.x86_64 3:19.03.12-3.el7 docker-ce-stable
docker-ce.x86_64 3:19.03.11-3.el7 docker-ce-stable
docker-ce.x86_64 3:19.03.10-3.el7 docker-ce-stable
docker-ce.x86_64 3:19.03.0-3.el7 docker-ce-stable
docker-ce.x86_64 3:18.09.9-3.el7 docker-ce-stable
docker-ce.x86_64 3:18.09.8-3.el7 docker-ce-stable
docker-ce.x86_64 3:18.09.7-3.el7 docker-ce-stable
docker-ce.x86_64 3:18.09.6-3.el7 docker-ce-stable
docker-ce.x86_64 3:18.09.5-3.el7 docker-ce-stable
docker-ce.x86_64 3:18.09.4-3.el7 docker-ce-stable
docker-ce.x86_64 3:18.09.3-3.el7 docker-ce-stable
docker-ce.x86_64 3:18.09.2-3.el7 docker-ce-stable
docker-ce.x86_64 3:18.09.1-3.el7 docker-ce-stable
docker-ce.x86_64 3:18.09.0-3.el7 docker-ce-stable
docker-ce.x86_64 18.06.3.ce-3.el7 docker-ce-stable
docker-ce.x86_64 18.06.2.ce-3.el7 docker-ce-stable
docker-ce.x86_64 18.06.1.ce-3.el7 docker-ce-stable
docker-ce.x86_64 18.06.0.ce-3.el7 docker-ce-stable
docker-ce.x86_64 18.03.1.ce-1.el7.centos docker-ce-stable
docker-ce.x86_64 18.03.0.ce-1.el7.centos docker-ce-stable
docker-ce.x86_64 17.12.1.ce-1.el7.centos docker-ce-stable
docker-ce.x86_64 17.12.0.ce-1.el7.centos docker-ce-stable
docker-ce.x86_64 17.09.1.ce-1.el7.centos docker-ce-stable
docker-ce.x86_64 17.09.0.ce-1.el7.centos docker-ce-stable
docker-ce.x86_64 17.06.2.ce-1.el7.centos docker-ce-stable
docker-ce.x86_64 17.06.1.ce-1.el7.centos docker-ce-stable
docker-ce.x86_64 17.06.0.ce-1.el7.centos docker-ce-stable
docker-ce.x86_64 17.03.3.ce-1.el7 docker-ce-stable
docker-ce.x86_64 17.03.2.ce-1.el7.centos docker-ce-stable
docker-ce.x86_64 17.03.1.ce-1.el7.centos docker-ce-stable
docker-ce.x86_64 17.03.0.ce-1.el7.centos docker-ce-stable
Available Packages
#安装指定版本的Docker-CE: (VERSION例如上面的17.03.0.ce-1.el7.centos)
[root@VM-16-4-centos ssh]# yum -y install docker-ce-[VERSION]8、启动docker 并设置开机自启
[root@VM-16-4-centos ssh]# systemctl enable docker
[root@VM-16-4-centos ssh]# systemctl start docker9、查看docker运行状态，是否安装成功
[root@VM-16-4-centos ssh]# systemctl status docker
[root@VM-16-4-centos ssh]# systemctl status docker
● docker.service - Docker Application Container Engine
Loaded: loaded (/usr/lib/systemd/system/docker.service; enabled; vendor preset: disabled)
Active: active (running) since Tue 2021-12-21 18:34:42 CST; 4min 35s ago
Docs: https://docs.docker.com
Main PID: 6823 (dockerd)
Tasks: 8
Memory: 32.2M
CGroup: /system.slice/docker.service
└─6823 /usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock
Dec 21 18:34:42 VM-16-4-centos dockerd[6823]: time="2021-12-21T18:34:42.331096661+08:00" level=info msg="ccResolverWrapper: sending update to cc: {[{unix:///run/containerd/containerd.sock <nil> 0 <nil>}] <nil> <nil>}" module=grpc
Dec 21 18:34:42 VM-16-4-centos dockerd[6823]: time="2021-12-21T18:34:42.331114846+08:00" level=info msg="ClientConn switching balancer to \"pick_first\"" module=grpc
Dec 21 18:34:42 VM-16-4-centos dockerd[6823]: time="2021-12-21T18:34:42.354454626+08:00" level=info msg="[graphdriver] using prior storage driver: overlay2"
Dec 21 18:34:42 VM-16-4-centos dockerd[6823]: time="2021-12-21T18:34:42.357225325+08:00" level=info msg="Loading containers: start."
Dec 21 18:34:42 VM-16-4-centos dockerd[6823]: time="2021-12-21T18:34:42.436268781+08:00" level=info msg="Default bridge (docker0) is assigned with an IP address 172.17.0.0/16. Daemon option --bip can be used to set a preferred IP address"
Dec 21 18:34:42 VM-16-4-centos dockerd[6823]: time="2021-12-21T18:34:42.470207710+08:00" level=info msg="Loading containers: done."
Dec 21 18:34:42 VM-16-4-centos dockerd[6823]: time="2021-12-21T18:34:42.496225366+08:00" level=info msg="Docker daemon" commit=459d0df graphdriver(s)=overlay2 version=20.10.12
Dec 21 18:34:42 VM-16-4-centos dockerd[6823]: time="2021-12-21T18:34:42.496280028+08:00" level=info msg="Daemon has completed initialization"
Dec 21 18:34:42 VM-16-4-centos systemd[1]: Started Docker Application Container Engine.
Dec 21 18:34:42 VM-16-4-centos dockerd[6823]: time="2021-12-21T18:34:42.511760185+08:00" level=info msg="API listen on /var/run/docker.sock"如上面active(running) 为成功。
阿里的镜像源大全都在这里了 https://developer.aliyun.com/mirror/
