Docker无法使用挂载硬盘上的数据重新启动

Question

我使用mount /dev/vdb /mnt/data在/mnt/data上挂载硬盘

更改内部的默认docker文件夹：/etc/docker/daemon.json by

{
   "graph": "/mnt/data/docker"
}

一切都很正常。

但在计算机重新启动后: docker守护进程无法重新启动

我得到了这些错误：

$ service docker start
Job for docker.service failed because the control process exited with error code. See "systemctl status docker.service" and "journalctl -xe" for details.

和

$ systemctl status docker.service
● docker.service - Docker Application Container Engine
   Loaded: loaded (/lib/systemd/system/docker.service; enabled; vendor preset: enabled)
   Active: inactive (dead) (Result: exit-code) since Thu 2017-10-05 13:58:58 UTC; 45s ago
     Docs: https://docs.docker.com
  Process: 5896 ExecStart=/usr/bin/dockerd -H fd:// (code=exited, status=1/FAILURE)
 Main PID: 5896 (code=exited, status=1/FAILURE)

Oct 05 13:58:58 mycomputer systemd[1]: Failed to start Docker Application Container Engine.
Oct 05 13:58:58 mycomputer systemd[1]: docker.service: Unit entered failed state.
Oct 05 13:58:58 mycomputer systemd[1]: docker.service: Failed with result 'exit-code'.
Oct 05 13:58:58 mycomputer systemd[1]: docker.service: Service hold-off time over, scheduling restart.
Oct 05 13:58:58 mycomputer systemd[1]: Stopped Docker Application Container Engine.
Oct 05 13:58:58 mycomputer systemd[1]: docker.service: Start request repeated too quickly.
Oct 05 13:58:58 mycomputer systemd[1]: Failed to start Docker Application Container Engine.

Answer 1

Docker在挂载您的非OS磁盘(mnt/data/docker)之前启动。您可以让docker等待挂载成功后再启动docker。

找到挂载，将Docker systemd服务文件编辑为require，等待挂载后再启动。

systemctl list-units --type==mount # Lists all the mounts. 
systemctl status <example.mount> # Get details about mount. Find the one which matches your mount directory
sudo nano /lib/systemd/system/docker.service # Edit your systemd service file

在"After“和"Requires”行的末尾添加名称。

[Unit]
Description=Docker Application Container Engine
Documentation=https://docs.docker.com
BindsTo=containerd.service
After=network-online.target firewalld.service containerd.service <example.mount>
Wants=network-online.target
Requires=docker.socket <example.mount>
...

sudo systemctl daemon-reload
sudo systemctl restart docker.service