docker执行restart命令时报错：Job for docker.service failed because start of the service was attempted too of

项目场景：

在centos7中安装好docker后，配置了国内的镜像源，然后重启docker时报以下错误。

sudo systemctl restart docker

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问题描述

执行重启命令后报错，如下：

[root@localhost docker]# sudo systemctl restart docker
Job for docker.service failed because start of the service was attempted too often. See "systemctl status docker.service" and "journalctl -xe" for details.
To force a start use "systemctl reset-failed docker.service" followed by "systemctl start docker.service" again.

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解决方案：

在daemon.json同级目录下生成daemon.conf文件再重启即可解决

mv /etc/docker/daemon.json /etc/docker/daemon.conf