My centos 7 was already have device-mapper-libs.x86_64.7.1.02.84-14.el7 installed, when I installed docker (yum install -y docker) and try to start docker service, it failed:<br />
docker: /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<br />
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so I have to update device-mapper-libs, then docker service can be started.
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