最近發現某臺機器上的Docker服務無法開啟，報如下錯誤：
[root@localhost ~]# docker ps -a Cannot connect to the Docker daemon. Is 'docker -d' running on this host? [root@localhost ~]# service docker restart Redirecting to /bin/systemctl restart docker.service Job for docker.service failed. See 'systemctl status docker.service' and 'journalctl -xn' for details.
沒找到對應的解決方法，只能進行重灌了。以下附上Centos7下解除安裝docker的命令：
[root@localhost ~]# yum list installed | grep docker Repodata is over 2 weeks old. Install yum-cron? Or run: yum makecache fast docker.x86_64 1.7.1-108.el7.centos @extras docker-selinux.x86_64 1.7.1-108.el7.centos @extras [root@localhost ~]# yum -y remove docker.x86_64 [root@localhost ~]# yum -y remove docker-selinux.x86_64