Re: [libvirt-users] Hotplug of disk devices in LXC failed with libvirt of version 1.0.2

On 07/16/2013 01:29 PM, Guan Qiang wrote: > 于 2013/7/15 17:32, Gao feng 写道: >> On 07/15/2013 05:18 PM, hzguanqiang wrote: >>> Hi, Gao Feng >>> >>> I've tried what you said, but still exists the problem: >>> >>> ubuntu@lxc:~$ vir attach-disk instance-0000002c /dev/dm-0 sdb >>> error: Failed to attach disk >>> error: Unable to create device /proc/10366/root/dev/sdb: Permission denied >>> >>> I think finding what it means by saying 'Unable to create device /proc/10366/root/dev/sdb: Permission denied' is the key. >>> But anyway, thanks for your help! >>> >> Do you have <idmap> configured for your lxc domain? >> I just posted a patchset to fix the problem that failed to create device when user namespace enabled. >> >> BTW, does it work well if you directly write the configuration to the xml of lxc domain? >> >> Thanks > Hi, Gao feng, > > I tried to write the configuration in the xml as you said, and it works. > > And I didn't set <idmap> configure for my lxc domain. The xml content of my lxc domain is just as following: > ... > I still don't understand why I can't hotplug attach disk device for the lxc domain. > Expect more detailed answer, Thanks! > it's because apparmor deny libvirt to create device node under directory /proc/10366/root/dev/. I don't know if this will help you, you can have a try. change the apparmor profile of libvirtd. check the /etc/apparmor.d/usr.sbin.libvirtd, and add /proc/ rw.