一、运行docker Linux内核版本需要在3.8以上,针对centos6.5 内核为2.6的系统需要先升级内核.不然会特别卡,退出容器.


 在yum的ELRepo源中,有mainline(3.13.1)、long-term(3.10.28)这2个内核版本,考虑到long-term更稳定,会长期更新,所以选择这个版本。


1、查看当前版本:


[root@localhost ~]# more /etc/issue
CentOS release 6.5 (Final)
Kernel \r on an \m
[root@localhost ~]# uname -a
Linux localhost.localdomain 2.6.32-431.el6.x86_64 #1 SMP Fri Nov 22 03:15:09 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux

2、升级内核至3.10.28

 

1、>导入public key


rpm --import https://www.elrepo.org/RPM-GPG-KEY-elrepo.org

2、>安装ELRepo到CentOS-6.5中


rpm -ivh http://www.elrepo.org/elrepo-release-6-5.el6.elrepo.noarch.rpm

3、>安装**kernel-lt(lt=long-term)**


yum --enablerepo=elrepo-kernel install kernel-lt -y

或者安装kernel-ml(ml=mainline)


yum --enablerepo=elrepo-kernel install kernel-ml -y

4、>编辑grub.conf文件,修改Grub引导顺序

[root@localhost ~]# vim /etc/grub.conf

# grub.conf generated by anaconda
#
default=0
timeout=5
splashimage=(hd0,0)/boot/grub/splash.xpm.gz
hiddenmenu
title CentOS (3.10.28-1.el6.elrepo.x86_64)
root (hd0,0)
kernel /boot/vmlinuz-3.10.28-1.el6.elrepo.x86_64 ro root=UUID=0a05411f-16f2-4d69-beb0-2db4cefd3613 rd_NO_LUKS KEYBOARDTYPE=pc KEYTABLE=us rd_NO_MD crashkernel=auto.UTF-8 rd_NO_LVM rd_NO_DM rhgb quiet
initrd /boot/initramfs-3.10.28-1.el6.elrepo.x86_64.img
title CentOS (2.6.32-431.3.1.el6.x86_64)
root (hd0,0)
kernel /boot/vmlinuz-2.6.32-431.3.1.el6.x86_64 ro root=UUID=0a05411f-16f2-4d69-beb0-2db4cefd3613 rd_NO_LUKS KEYBOARDTYPE=pc KEYTABLE=us rd_NO_MD crashkernel=auto.UTF-8 rd_NO_LVM rd_NO_DM rhgb quiet
initrd /boot/initramfs-2.6.32-431.3.1.el6.x86_64.img


确认刚安装好的内核在哪个位置,然后设置default值(从0开始),一般新安装的内核在第一个位置,所以设置default=0


5、>重启,查看内核版本号.


[root@localhost ~]# reboot
[root@localhost ~]# uname -r
3.10.104-1.el6.elrepo.x86_64

至此,CentOS6.5的内核升级完成,下面就可以安装docker了.


二、安装docker


 直接使用命令: yum install docker-io   是会报错的!!!  提示:No package docker-io available.


 需要先安装yum 源.


yum -y install http://dl.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm

再执行


yum install docker-io

就可以正常安装了!!


在安装的过程中由于dns的问题报了错,所以要设置好自己的dns确保服务器能连接到外网,我当时设置的dns为:


vim /etc/resolv.conf 
nameserver 8.8.8.8
nameserver 8.8.4.4

启动docker


service docker start

查看docker版本:


Centos6.5下docker 环境搭建
[root@localhost ]# docker version
Client version: 1.7.1
Client API version: 1.19
Go version (client): go1.4.2
Git commit (client): 786b29d/1.7.1
OS/Arch (client): linux/amd64
Server version: 1.7.1
Server API version: 1.19
Go version (server): go1.4.2
Git commit (server): 786b29d/1.7.1
OS/Arch (server): linux/amd64
Centos6.5下docker 环境搭建

查看docker日志.


cat /var/log/docker

 至此,docker安装完成!!!