centos65安装docker遇到的坑

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#导入public key
rpm --import https://www.elrepo.org/RPM-GPG-KEY-elrepo.org

#安装elrepo到内核为2.6.32的CentOS中
rpm -Uvh http://www.elrepo.org/elrepo-release-6-6.el6.elrepo.noarch.rpm

#安装kernel-lt(long term support)长期支持版本
yum --enablerepo=elrepo-kernel install kernel-lt -y

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访问http://elrepo.org/linux/kernel/el6/x86_64/RPMS/下载对应的rpm包，通过rpm方式安装：
rpm -ivh kernel-lt-3.10.93-1.el6.elrepo.x86_64.rpm

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vi /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/xvda1
#          initrd /boot/initrd-[generic-]version.img
#boot=/dev/xvda
default=0
timeout=5
splashimage=(hd0,0)/boot/grub/splash.xpm.gz
hiddenmenu
title CentOS (3.10.105-1.el6.elrepo.x86_64)
        root (hd0,0)
        kernel /boot/vmlinuz-3.10.105-1.el6.elrepo.x86_64 ro root=UUID=94e4e384-0ace-437f-bc96-057dd64f42ee 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 /boot/initramfs-3.10.105-1.el6.elrepo.x86_64.img
title CentOS (2.6.32-573.22.1.el6.x86_64)
        root (hd0,0)
        kernel /boot/vmlinuz-2.6.32-573.22.1.el6.x86_64 ro root=UUID=94e4e384-0ace-437f-bc96-057dd64f42ee 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 /boot/initramfs-2.6.32-573.22.1.el6.x86_64.img
title CentOS (2.6.32-431.23.3.el6.x86_64)

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uname -a
Linux iZm5eib1msf1eaxvrvhp60Z 3.10.105-1.el6.elrepo.x86_64 #1 SMP Fri Feb 10 10:48:08 EST 2017 x86_64 x86_64 x86_64 GNU/Linux

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yum install -y docker-engine
service docker start
sudo docker version