[pve-devel] qemu : systemd cgroup scope already exist bug

[Alexandre DERUMIER]

we can test if scope still exist here:

/sys/fs/cgroup/systemd/qemu.slice/vmid.scope


if exist, systemctl stop vmid.scope  , before doing the system-run


----- Mail original -----
De: "aderumier" <aderumier at odiso.com>
À: "pve-devel" <pve-devel at pve.proxmox.com>
Envoyé: Jeudi 21 Avril 2016 03:17:47
Objet: [pve-devel] qemu : systemd cgroup scope already exist bug

Hi, 

I have seen some users on the forum having a bug with systemd scope bug. 
https://forum.proxmox.com/threads/qm-start-failed-to-create-message-input-output-error.25903/ 
http://permalink.gmane.org/gmane.linux.pve.user/5301 

I have hit this bug sometimes too. 

after a vm shutdown , the scope is still see has running by systemd. 

And when you try to start the vm, you can't because systemd-run will say that the scope already exist. 


In this case, we need to run "systemctl stop vmid.scope". 

I have seen exactly same bug report on docker with no fix. 
https://github.com/docker/docker/issues/7015 

They workaround is to call systemctl stop vmid.scope, before launching systemd-run. 


Maybe could be do the same ? 
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