CentOS6安装docker

1、升级内核到3.10

cd /etc/yum.repos.d
wget http://www.hop5.in/yum/el6/hop5.repo yum install kernel-ml-aufs kernel-ml-aufs-devel

2、修改grub的主配置文件/etc/grub.conf，设置default=0，表示第一个title下的内容为默认启动的kernel（一般新安装的内核在第一个位置），修改之后如下：

[root@localhost ~]# cat /etc/grub.conf
# grub.conf generated by anaconda
#
# Note that you do not have to rerun grub after making changes to this file
# NOTICE:  You have a /boot partition.  This means that
#          all kernel and initrd paths are relative to /boot/, eg.
#          root (hd0,0)
#          kernel /vmlinuz-version ro root=/dev/sda2
#          initrd /initrd-[generic-]version.img
#boot=/dev/sda
default=0
timeout=5
splashimage=(hd0,0)/grub/splash.xpm.gz
hiddenmenu
title CentOS (3.10.5-3.el6.x86_64)
root (hd0,0)
kernel /vmlinuz-3.10.5-3.el6.x86_64 ro root=UUID=78514585-1521-472c-8ca4-110fb82e9959 rd_NO_LUKS rd_NO_LVM LANG=en_US.UTF-8 rd_NO_MD SYSFONT=latarcyrheb-sun16 crashkernel=auto  KEYBOARDTYPE=pc KEYTABLE=us rd_NO_DM rhgb quiet
initrd /initramfs-3.10.5-3.el6.x86_64.img
title CentOS (2.6.32-431.el6.x86_64)
root (hd0,0)
kernel /vmlinuz-2.6.32-431.el6.x86_64 ro root=UUID=78514585-1521-472c-8ca4-110fb82e9959 rd_NO_LUKS rd_NO_LVM LANG=en_US.UTF-8 rd_NO_MD SYSFONT=latarcyrheb-sun16 crashkernel=auto  KEYBOARDTYPE=pc KEYTABLE=us rd_NO_DM rhgb quiet
initrd /initramfs-2.6.32-431.el6.x86_64.img

3、重启系统，这时候你的内核就成功升级了，执行uname -r

[root@localhost ~]# uname -r
3.10.5-3.el6.x86_64

4、确保系统中yum下载的包是最新的

sudo yum update

5、创建docker的yum源

sudo tee /etc/yum.repos.d/docker.repo <<-'EOF'
[dockerrepo]
name=Docker Repository
baseurl=https://yum.dockerproject.org/repo/main/centos/$releasever/
enabled=1
gpgcheck=1
gpgkey=https://yum.dockerproject.org/gpg
EOF

6、安装docker

sudo yum install docker-engine

7、启动docker

sudo service docker start

8、查看docker服务状态

service docker status

如果显示 docker dead but pid file exists，则执行如下指令

sudo yum-config-manager --enable public_ol6_latest
sudo yum install device-mapper-event-libs

9、再查看docker的服务状态

[root@localhost ~]# service docker status
docker (pid  2581) is running...