PowerProtect：Cyber Recovery Docker 容器无法启动“无法连接到 Docker 守护程序”

Summary: 由于 docker 守护程序未运行，导致 Docker 容器无法启动，因此客户无法使用 Cyber Recovery。

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Symptoms

尝试运行 Docker PS 时，将显示一条消息，询问 Docker 守护程序是否正在运行。
  
[root@hostname ~]# docker ps -a
Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?


Docker 服务处于非活动状态
  
[root@hostname ~]# systemctl status docker
? docker.service - Docker Application Container Engine
   Loaded: loaded (/usr/lib/systemd/system/docker.service; enabled; vendor preset: disabled)
   Active: failed (Result: start-limit) since Wed 2022-11-16 07:39:05 EST; 3min 34s ago
     Docs: https://docs.docker.com
 Main PID: 7590 (code=exited, status=1/FAILURE)

Nov 16 07:39:02 hostname systemd[1]: docker.service failed.
Nov 16 07:39:05 hostname systemd[1]: docker.service holdoff time over, scheduling restart.
Nov 16 07:39:05 hostname systemd[1]: Stopped Docker Application Container Engine.
Nov 16 07:39:05 hostname systemd[1]: start request repeated too quickly for docker.service
Nov 16 07:39:05 hostname systemd[1]: Failed to start Docker Application Container Engine.
Nov 16 07:39:05 hostname systemd[1]: Unit docker.service entered failed state.
Nov 16 07:39:05 hostname systemd[1]: docker.service failed.
Nov 16 07:39:40 hostname systemd[1]: start request repeated too quickly for docker.service
Nov 16 07:39:40 hostname systemd[1]: Failed to start Docker Application Container Engine.
Nov 16 07:39:40 hostname systemd[1]: docker.service failed.


Cause

尝试启动 docker 守护程序时，出现空间问题警告消息
  
[root@ hostname]# sudo dockerd
Error starting daemon: Unable to get the TempDir under /var/lib/docker: mkdir /var/lib/docker/tmp: no space left on device

存在磁盘空间问题。根文件系统似乎已满：
  
[root@hostname ~]# df -kh
Filesystem                                Size  Used Avail Use% Mounted on
/dev/mapper/centos_hostname-root   38G   38G   20K 100% /        <<<<
devtmpfs                                  1.9G     0  1.9G   0% /dev
tmpfs                                     1.9G  8.0K  1.9G   1% /dev/shm
tmpfs                                     1.9G  8.9M  1.9G   1% /run
tmpfs                                     1.9G     0  1.9G   0% /sys/fs/cgroup
/dev/sda1                                1014M  189M  826M  19% /boot
/dev/mapper/centos_ehs--hostname-home   19G  3.0G   16G  17% /home
tmpfs                                     379M     0  379M   0% /run/user/0
[root@hostname ~]#



Resolution

通过删除一些不再需要的旧支持包和以前版本的软件包来申请一些空间后，重新启动 Cyber Recovery 虚拟机。 容器现在又开始运行了，客户能够继续使用 Cyber Recovery 数据避风港了。

Affected Products

Cyber Recovery Series

Products

Cyber Recovery Series, CyberSense
Article Properties
Article Number: 000214296
Article Type: Solution
Last Modified: 04 Nov 2025
Version:  2
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