步骤

1. yum update kernel
2. reboot
3. yum install docker-io
4. yum install device-mapper-event-libs

说明

• 网上的文章都是需要升级到 linux 3.10 的内核，其实升级到 2.x 的较新的也行
• 需要安装 device-mapper-event-libs,否则报错 /usr/bin/docker: relocation error: /usr/bin/docker: symbol dm_task_get_info_with_deferred_remove, version Base not defined in file libdevmapper.so.1.02 with link time reference
• centos 6 在配置文件为 /etc/sysconfig/docker，配置 other_args=--registry-mirror=https://registry.docker-cn.com 将镜像设置成国内的

问题

docker 挂了重启后，start 报错 “device or resource busy”

执行 cat /proc/mounts | grep "mapper/docker" | awk '{print $2}' | xargs -r umount 解决

• https://github.com/moby/moby/issues/5684
• http://blog.hashbangbash.com/2014/11/docker-devicemapper-fix-for-device-or-resource-busy-ebusy/