Linux6.5 使用Docker

1. 查看一下当前Linux内核的版本,命令：uname -r

2.运行docker需要内核版本为3.8或者更高的版本,内核必须支持一种合适的存储驱动(Drivice Mapper、AUFS、vfs、btrfs、ZFS),默认存储驱动为Drivice Mapper或AUFS且内核必须开启cgroup和namespce功能

3.Linux 升级命令

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

4.修改grub的主配置文件/etc/grub.conf，设置default值将升级的内核作为默认启动的kernel。

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=c243bf98-2ece-41a4-b660-b11e8d786fcb 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=c243bf98-2ece-41a4-b660-b11e8d786fcb 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

5.重新启动后在查看一下版本，第一个命令

6.查看一下是否支持aufs，命令如下

grep aufs /proc/filesystems

7.关闭selinux

setenforce 0
sed -i '/^SELINUX=/c\SELINUX=disabled' /etc/selinux/config

8.下载安装epel

wget http://mirrors.sohu.com/fedora-epel/6/x86_64/epel-release-6-8.noarch.rpm
rpm -ivh epel-release-6-8.noarch.rpm
sed -i 's/^mirrorlist=https/mirrorlist=http/' /etc/yum.repos.d/epel.repo

9.安装docker-io

yum -y install docker-io

10.启动一下docker，命令 service docker start