Docker之rm: cannot remove ‘bkce/cicdkit/docker/lib/docker/overlay2’: Device or resource busy

偏执的太偏执、 2022-03-31 10:48 546阅读 0赞

[root@mysql57-1 data]# rm -rf bkce
    rm: cannot remove ‘bkce/cicdkit/docker/lib/docker/overlay2’: Device or resource busy
    [root@mysql57-1 data]# umount bkce/cicdkit/docker/lib/docker/overlay2

参考文章：

Google搜索`Resolve docker netns issue: Device or resource busy`

> Also works for overlay : cannot remove ‘/var/lib/docker/overlay’  
> rm: cannot remove‘/var/run/docker/netns/default’: Device or resource busy  
> I encountered this issue with Docker version: 17.05.0-ce, build 89658be but seems to not be resolved in docker 17.06 at moment of writing as it’s related to this open issue: [https://github.com/moby/moby/issues/22260][https_github.com_moby_moby_issues_22260].  
> Kernel Version: 3.10.0–514.el7.x86\_64  
> Operating System: Red Hat Enterprise Linux Server 7.3 (Maipo)  
> OSType: linux  
> Architecture: x86\_64  
> Context  
> I was trying to automate the lifecycle of a container from creation to deletion using a bash script. Someone could argue me that i could use an orchestrator as Kubernetes/Swarm but i want something more simpler because it’s just for test purpose and I did’nt want to manage orchestrator dependencies .

> Well, It worked pretty fine until the day I have started to execute docker run commands with : -net=host . The purpose of fhis argument is to allwo the container to share the same NETWORK & UTS namespaces than host. It means that the container has the same hostame & share devices,iptables,etc … with the host.

> How ?  
> My file docker\_remove.sh was looking like :

> echo “<<< Erasing docker rpm … >>>”  
> yum -y remove docker-engine docker-engine-selinux  
> echo “<<< Cleaning data rpm … >>>”  
> rm -rf /var/lib/docker  
> rm -rf /var/run/docker  
> After resolving the issue, it looks like:

> echo “<<< Erasing docker rpm … >>>”  
> yum -y remove docker-engine docker-engine-selinux  
> umount /var/run/docker/netns/default  
> echo “<<< Cleaning data rpm … >>>”  
> rm -rf /var/lib/docker  
> rm -rf /var/run/docker  
> Why ?  
> Fisrtly, we have to check which process is using the resource. The command below will show you this PID process:

> fuser /var/run/docker/netns/default  
> If you got the error : “fuser: command not found”, you have to install the package pmisc before:

> yum -y install psmisc  
> Then, print mount information of this process:

> grep docker /proc//mountinfo  
> You should notice a mount of /var/run/docker/netns/default to the root filesystem / . If you want more information about mountinfo , you can read this Linux manual page about /proc: [http://man7.org/linux/man-pages/man5/proc.5.html][http_man7.org_linux_man-pages_man5_proc.5.html]

> Solution  
> As seen above, we are just unmounting /var/run/docker/netns/default.

> rm: cannot remove‘/var/lib/docker/overlay’: Device or resource busy  
> umount /var/lib/docker/overlay to resolve the issue.

> Thanks for reading ? !

[https_github.com_moby_moby_issues_22260]: https://github.com/moby/moby/issues/22260
[http_man7.org_linux_man-pages_man5_proc.5.html]: http://man7.org/linux/man-pages/man5/proc.5.html