docker 安装 Cannot connect to the Docker daemon

安装： yum install docker-io   

卸载：yum remove docker-io

服务启动日志：/var/log/docker

time="2017-10-19T10:52:40.777968827+08:00" level=warning msg="You are running linux kernel version 2.6.32-431.23.3.el6.x86_64, which might be unstable running docker. Please upgrade your kernel to 3.10.0."
/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

应该是libmapper有关，需要升级下这个库:

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

参考：http://www.codeweblog.com/centos-6-5%E4%B8%8A%E5%B0%9D%E8%AF%95docker%E9%81%87%E5%88%B0%E7%9A%84%E5%87%A0%E4%B8%AA%E9%97%AE%E9%A2%98/