Docker 要求 CentOS 系统的内核版本高于 3.10 ,通过 uname -r 命令查看你当前的CentOS的内核版本,来验证你的CentOS 版本是否支持 Docker 。
[root@localhost ~]# uname -r
3.10.0-957.el7.x86_64使用 root 权限登录 CentOS。确保 yum 包更新到最新,如下:
[root@localhost ~]# yum update
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
* base: mirrors.cn99.com
* extras: mirrors.aliyun.com
* updates: mirrors.aliyun.com
No packages marked for update
[root@localhost ~]#判断当前系统是否已经安装docker,如下:
[root@localhost ~]# yum list installed | grep docker
[root@localhost ~]#上面表示没有安装过docker。如果你安装过docker,可以使用“yum remove”删除docker。如下:
[root@localhost ~]# yum remove docker docker-common docker-selinux docker-engine安装需要的软件包, yum-util 提供yum-config-manager功能,另外两个是devicemapper驱动依赖的。如下:
[root@localhost ~]# yum install -y yum-utils device-mapper-persistent-data lvm2
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
* base: mirrors.cn99.com
* extras: mirrors.aliyun.com
* updates: mirrors.aliyun.com
Package device-mapper-persistent-data-0.7.3-3.el7.x86_64 already installed and latest version
Package 7:lvm2-2.02.180-10.el7_6.7.x86_64 already installed and latest version
Resolving Dependencies
--> Running transaction check
---> Package yum-utils.noarch 0:1.1.31-50.el7 will be installed
--> Processing Dependency: python-kitchen for package: yum-utils-1.1.31-50.el7.noarch
--> Processing Dependency: libxml2-python for package: yum-utils-1.1.31-50.el7.noarch
--> Running transaction check
---> Package libxml2-python.x86_64 0:2.9.1-6.el7_2.3 will be installed
---> Package python-kitchen.noarch 0:1.1.1-5.el7 will be installed
--> Processing Dependency: python-chardet for package: python-kitchen-1.1.1-5.el7.noarch
--> Running transaction check
---> Package python-chardet.noarch 0:2.2.1-1.el7_1 will be installed
--> Finished Dependency Resolution
...
Installed:
yum-utils.noarch 0:1.1.31-50.el7
Dependency Installed:
libxml2-python.x86_64 0:2.9.1-6.el7_2.3 python-chardet.noarch 0:2.2.1-1.el7_1 python-kitchen.noarch 0:1.1.1-5.el7
Complete!设置yum docker源,如下:
[root@localhost ~]# yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo
Loaded plugins: fastestmirror
adding repo from: https://download.docker.com/linux/centos/docker-ce.repo
grabbing file https://download.docker.com/linux/centos/docker-ce.repo to /etc/yum.repos.d/docker-ce.repo
repo saved to /etc/yum.repos.d/docker-ce.repo
[root@localhost ~]#可以查看所有仓库中所有docker版本,并选择特定版本安装。如下:
[root@localhost ~]# yum list docker-ce --showduplicates | sort -r
* updates: mirrors.aliyun.com
Loading mirror speeds from cached hostfile
Loaded plugins: fastestmirror
* extras: mirrors.aliyun.com
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
* base: mirrors.cn99.com
Available Packages
[root@localhost ~]#安装docker,如下:
# 由于repo中默认只开启stable仓库,故这里安装的是最新稳定版17.12.0
[root@localhost ~]# sudo yum install docker-ce
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
* base: mirrors.cn99.com
* extras: mirrors.aliyun.com
* updates: mirrors.aliyun.com
Resolving Dependencies
...启动并加入开机启动。如下:
# 启动docker
[root@localhost ~]# systemctl start docker
# 设置开机启动
[root@localhost ~]# systemctl enable docker
Created symlink from /etc/systemd/system/multi-user.target.wants/docker.service to /usr/lib/systemd/system/docker.service.
[root@localhost ~]#验证安装是否成功。如下:
[root@localhost ~]# docker version
Client:
Version: 18.09.6
API version: 1.39
Go version: go1.10.8
Git commit: 481bc77156
Built: Sat May 4 02:34:58 2019
OS/Arch: linux/amd64
Experimental: false
Server: Docker Engine - Community
Engine:
Version: 18.09.6
API version: 1.39 (minimum version 1.12)
Go version: go1.10.8
Git commit: 481bc77
Built: Sat May 4 02:02:43 2019
OS/Arch: linux/amd64
Experimental: false