红联Linux门户
Linux帮助

Docker在CentOS 7下的安装

发布时间:2014-12-29 09:42:44来源:linux网站作者:ovcer

一、检查前提条件

1.内核

检查内核的版本是否安装了3.8或更高的版本

[root@localhost ~]# uname -a
Linux localhost.localdomain 3.10.0-123.13.2.el7.x86_64 #1 SMP Thu Dec 18 14:09:13 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux

2.检查Device Mapper

[root@localhost ~]# ls -l /sys/class/misc/device-mapper/
总用量 0
-r--r--r--. 1 root root 4096 12月 28 17:18 dev
drwxr-xr-x. 2 root root    0 12月 28 17:14 power
lrwxrwxrwx. 1 root root    0 12月 28 17:18 subsystem -> ../../../../class/misc
-rw-r--r--. 1 root root 4096 12月 28 17:13 uevent

或者在/proc/device文件中检查是否有device-mapper条目

[root@localhost ~]# grep device-mapper /proc/devices
253 device-mapper


二、安装Docker

[root@localhost ~]# yum -y install docker

已加载插件:fastestmirror
Loading mirror speeds from cached hostfile
* base: mirrors.btte.net
* epel: ftp.sjtu.edu.cn
* extras: mirrors.btte.net
* updates: mirrors.neusoft.edu.cn
正在解决依赖关系
--> 正在检查事务
---> 软件包 docker.x86_64.0.1.3.2-4.el7.centos 将被 安装
--> 解决依赖关系完成

依赖关系解决

Package    架构 版本 源 大小
正在安装:
docker      x86_64 1.3.2-4.el7.centos      extras 5.6 M

事务概要
安装  1 软件包

总下载量:5.6 M
安装大小:24 M
Downloading packages:
docker-1.3.2-4.el7.centos.x86_64.rpm  | 5.6 MB  00:00:04  
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
正在安装    : docker-1.3.2-4.el7.centos.x86_64 1/1
验证中      : docker-1.3.2-4.el7.centos.x86_64 1/1

已安装:
docker.x86_64 0:1.3.2-4.el7.centos                                                                                                                                                        

完毕!


三、启动Docker进程

[root@localhost ~]# systemctl start docker

如果想在开机的时间自动启动Docker服务,执行如下命令

[root@localhost ~]# systemctl enable docker
ln -s '/usr/lib/systemd/system/docker.service' '/etc/systemd/system/multi-user.target.wants/docker.service'

查看Docker是否运行

[root@localhost ~]# docker info
Containers: 0
Images: 0
Storage Driver: devicemapper
Pool Name: docker-253:1-614613-pool
Pool Blocksize: 65.54 kB
Data file: /var/lib/docker/devicemapper/devicemapper/data
Metadata file: /var/lib/docker/devicemapper/devicemapper/metadata
Data Space Used: 307.2 MB
Data Space Total: 107.4 GB
Metadata Space Used: 725 kB
Metadata Space Total: 2.147 GB
Library Version: 1.02.84-RHEL7 (2014-03-26)
Execution Driver: native-0.2
Kernel Version: 3.10.0-123.13.2.el7.x86_64
Operating System: CentOS Linux 7 (Core)