Re: [libvirt-users] Hotplug of disk devices in LXC failed with libvirt of version 1.0.2
δΊ 2013/7/15 17:32, Gao feng ει:
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:
<domain type='lxc' id='13071'>
<name>instance-0000002b</name>
<uuid>cf76c280-ac9c-44a6-94e3-237b46a7a68b</uuid>
<memory unit='KiB'>2097152</memory>
<currentMemory unit='KiB'>2097152</currentMemory>
<vcpu placement='static'>1</vcpu>
<os>
<type arch='x86_64'>exe</type>
<init>/sbin/init</init>
<cmdline>console=tty0 console=ttyS0</cmdline>
</os>
<clock offset='utc'/>
<on_poweroff>destroy</on_poweroff>
<on_reboot>restart</on_reboot>
<on_crash>destroy</on_crash>
<devices>
<emulator>/usr/lib/libvirt/libvirt_lxc</emulator>
<filesystem type='mount' accessmode='passthrough'>
<source
dir='/opt/stack/data/nova/instances/cf76c280-ac9c-44a6-94e3-237b46a7a68b/rootfs'/>
<target dir='/'/>
</filesystem>
<interface type='bridge'>
<mac address='fa:16:3e:7a:1b:c8'/>
<source bridge='br100'/>
<target dev='veth0'/>
<filterref filter='nova-instance-instance-0000002b-fa163e7a1bc8'/>
</interface>
<console type='pty' tty='/dev/pts/2'>
<source path='/dev/pts/2'/>
<target type='lxc' port='0'/>
<alias name='console0'/>
</console>
</devices>
<seclabel type='none'/>
</domain>
I still don't understand why I can't hotplug attach disk device for the
lxc domain.
Expect more detailed answer, Thanks!