[libvirt] CreateMachine: Input/output error

[Chen, Hanxiao]

Hi Richard,

> -----Original Message-----
> From: Richard Weinberger [mailto:richard at nod.at]
> Sent: Friday, September 26, 2014 4:59 PM
> To: Chen, Hanxiao/陈 晗霄; Richard Weinberger; libvir-list at redhat.com
> Subject: Re: [libvirt] CreateMachine: Input/output error
> 
> Chen,
> 
> Am 26.09.2014 10:23, schrieb Chen, Hanxiao:
> >> Has anyone else seen this kind of issue?
> >> I'm currently a bit puzzled where to look for the root cause.
> >> Maybe it is related to dbus.
> >
> > Could you share your XML config?
> > Guess it's something with systemd.
> 
> There you go:
> <domain type='lxc'>
>         <name>c_secret_name</name>
>         <memory>524288</memory>
>         <os>
>                 <type>exe</type>
>                 <init>/sbin/init</init>
>         </os>
>         <idmap>
>                 <!-- here be dragons, the mapping is non-linear -->
>                 <uid start='0' target='101000' count='998'/>
>                 <gid start='0' target='101000' count='998'/>
>                 <uid start='65533' target='101998' count='2'/>
>                 <gid start='65533' target='101998' count='2'/>
>         </idmap>
>         <devices>
>                 <console type='pty'/>
>                 <filesystem type='mount'>
>                         <source dir='/srv/container0/secret_name/rootfs'/>
>                         <target dir='/'/>
>                 </filesystem>
>                 <interface type='bridge'>
>                         <source bridge='br0'/>
>                         <mac address='4a:19:0a:XX:XX:XX'/>
>                 </interface>
>         </devices>
> </domain>
> 
> Nothing special. My host is openSUSE 13.1.

On fedora20 with systemd 208, upstream libvirt,
I could reproduce it.

It not happened 100%,
but once it happened, the container could not be started anymore.
One workaround is to undefine it and change another name.
With a quick look, I did not find out a explanations.

Thanks,
- Chen