CentOS7 failed to start docker.service

  docker, question

Hi all:
Executed on CentOS7yum install dockerAfter installing docker, the following error occurred when testing docker:

[root@localhost /]# docker run -i -t ubuntu /bin/bash
 2014/11/27 15:21:52 Post http:///var/run/docker.sock/v1.14/containers/create: read unix /var/run/docker.sock: connection reset by peer

After searching, it was found that the docker service was not started, and the start service failed:

[root@localhost /]# systemctl start docker.service
 Job for docker.service failed. See 'systemctl status docker.service' and 'journalctl -xn' for details.
 [root@localhost /]# systemctl status docker.service
 docker.service - Docker Application Container Engine
 Loaded: loaded (/usr/lib/systemd/system/docker.service;  disabled)
 Active: failed (Result: start-limit) since Thu 2014-11-27 15:03:24 CST;  13s ago
 Docs: http://docs.docker.io
 Process: 4559 ExecStart=/usr/bin/docker -d $OPTIONS $DOCKER_STORAGE_OPTIONS (code=exited, status=1/FAILURE)
 Main PID: 4559 (code=exited, status=1/FAILURE)
 
 Nov 27 15:03:24 localhost.localdomain systemd[1]: docker.service: main proces  ...
 Nov 27 15:03:24 localhost.localdomain systemd[1]: Failed to start Docker Appl  ...
 Nov 27 15:03:24 localhost.localdomain systemd[1]: Unit docker.service entered  ...
 Nov 27 15:03:24 localhost.localdomain systemd[1]: docker.service holdoff time  ...
 Nov 27 15:03:24 localhost.localdomain systemd[1]: Stopping Docker Application  ...
 Nov 27 15:03:24 localhost.localdomain systemd[1]: Starting Docker Application  ...
 Nov 27 15:03:24 localhost.localdomain systemd[1]: docker.service start reques  ...
 Nov 27 15:03:24 localhost.localdomain systemd[1]: Failed to start Docker Appl  ...
 Nov 27 15:03:24 localhost.localdomain systemd[1]: Unit docker.service entered  ...
 Hint: Some lines were ellipsized, use -l to show in full.

What is the problem? ? ?

My reason is that a similar error occurred due to the modification of image acceleration. A comma {“registry-mirrors”: [“http://34df6785.m. dao cloud.io”] “is added after/etc /etc/docker/daemon.conf} and can be removed. For your reference