解决方案：
在任何开始尝试之前，使用systemctl命令完全停止Docker容器：
centos ~ # systemctl stop docker-3cabf046fa66eb3484a8be2c6ac162ee4e1e5c838a74b93f9a66546c9f206c24.scope
启动Docker容器：
centos ~ # docker start 3cabf046fa66 3cabf046fa66 centos ~ # docker ps -a CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 3cabf046fa66 mariadb:latest "mysqld_safe" 4 hours ago Up 10 seconds mariadb
问题
任何尝试启动、重新启动 docker 容器都会导致以下错误：
coreos ~ # docker start 3cabf046fa66 Error response from daemon: Cannot restart container 3cabf046fa66: [8] System error: Unit docker-3cabf046fa66eb3484a8be2c6ac162ee4e1e5c838a74b93f9a66546c9f206c24.scope already exists. FATA[0000] Error: failed to start one or more containers
状态为Exited (-1)：
centos ~ # docker ps -a CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 3cabf046fa66 mariadb:latest "mysqld_safe" 4 hours ago Exited (-1) 11 minutes ago mariadb
日期：2020-07-07 20:57:10 来源：oir作者：oir