1、问题描述

Docker宿主机重启后，再次执行systemctl start docker命令时报如下错误：

[root@k8s-node02 docker]# systemctl start dockerJob 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.

2、问题分析

需要删除/var/lib/docker下的文件。

3、解决方法

rm -rf /var/lib/docker

4、测试结果

[root@k8s-node02 docker]# systemctl start docker[root@k8s-node02 docker]# systemctl status docker● docker.service - Docker Application Container EngineLoaded: loaded (/usr/lib/systemd/system/docker.service; enabled; vendor preset: disabled)Active: active (running) since 一 -12-06 10:05:29 CST; 4s agoDocs: Main PID: 5453 (dockerd)Tasks: 12Memory: 36.0MCGroup: /system.slice/docker.service└─5453 /usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock

5、补充/var/lib/docker下存放了哪些docker信息？

/var/lib/docker/├── aufs # 存储AUFS驱动。Storage area for AUFS driver│ ├── diff# 层的分支目录。Branch directory of layer│ ├── layers # 层信息。Infomation about docker layer│ └── mnt# aufs的挂载点，容器的根目录。Mount point of aufs,root of containers├── containers # 存放日志文件。Container configurations (both LXC and Docker-specific)├── graph # 图片存储。Storage for the images├── init│ └── dockerinit-0.7.3 # Used as /sbin/init in containers├── linkgraph.db # sqlite 数据库存储链接和姓名。sqlite database storing links and names.├── lxc-start-unconfined -> /usr/bin/lxc-start # When starting a privileged container,this is used in lieu of lxc-start,to evade AppArmor confinement (whichmatches by exact path).├── repositories-aufs# 仓库信息。repository infomation└── volumes# 存储不是特定绑定的“匿名”卷。Storage for "anonymous" volumes(those which are not bind-mounts)