Centos6.5 安装docker

1、升级CentOS 6.5内核到 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 -Uvh http://www.elrepo.org/elrepo-release-6-6.el6.elrepo.noarch.rpm

3、安装 kernel-lt（lt=long-term）

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

4、编辑grub.conf文件，修改Grub引导顺序

vim /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 do not have a /boot partition.  This means that
#          all kernel and initrd paths are relative to /, eg.
#          root (hd0,0)
#          kernel /boot/vmlinuz-version ro root=/dev/sda1
#          initrd /boot/initrd-[generic-]version.img
#boot=/dev/sda
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 LANG=en_US.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 LANG=en_US.UTF-8 r
d_NO_LVM rd_NO_DM rhgb quiet
        initrd /boot/initramfs-2.6.32-431.3.1.el6.x86_64.img
title CentOS (2.6.32-431.el6.x86_64)
        root (hd0,0)
        kernel /boot/vmlinuz-2.6.32-431.el6.x86_64 ro root=UUID=0a05411f-16f2-4d69-beb0-2db4cefd3613 rd_NO_LUKS  KEYBOARDTYPE=pc KEYTABLE=us rd_NO_MD crashkernel=auto LANG=zh_CN.UTF-8 rd_NO
_LVM rd_NO_DM rhgb quiet
        initrd /boot/initramfs-2.6.32-431.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@dev ~]# uname -r
3.10.28-1.el6.elrepo.x86_64

2、出现错误：
docker: symbol dm_task_get_info_with_deferred_remove, version Base not defined in file libdevmapper.so.1.02 with link time reference

解决方法：
yum upgrade device-mapper-libs

3、出现错误：
WARN[0000] Your kernel does not support cgroup memory limit: mountpoint for memory not found
WARN[0000] mountpoint for cpu not found                
FATA[0000] Error mounting devices cgroup: mountpoint for devices not found

解决方法：
cgroup在宿主机上没有挂载。
vim /etc/fstab
加入
none        /sys/fs/cgroup        cgroup        defaults    0    0
重启机器即可

4、出现警告：
WARN[0000] Running modprobe bridge nf_nat failed with message: , error: exit status 1
WARN[0000] Your kernel does not support swap memory limit.

解决方法：
换操作系统cenos7 不要用docker 1.7.1