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

>On 07/17/2013 04:15 PM, Gao feng wrote: > 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. ln -s /etc/apparmor.d/usr.sbin.libvirtd /etc/apparmor.d/disable/ & /etc/init.d/apparmor restart should work, but libvirtd will run out of apparmor's control.