Hi Saurabh,
First of all. I think there are something wrong in you container configure file
the <idmap> should under <domain>.
such as
<domain type='lxc'>
<name>xxx</name>
<memory unit='KiB'>102400</memory>
<currentMemory unit='KiB'>102400</currentMemory>
<vcpu placement='static'>1</vcpu>
<resource>
<partition>/machine</partition>
</resource>
<os>
<type arch='x86_64'>exe</type>
<init>/bin/sh</init>
</os>
<idmap>
<uid start='0' target='1000' count='10'/>
<gid start='0' target='1000' count='10'/>
</idmap>
<clock offset='utc'/>
<on_poweroff>destroy</on_poweroff>
<on_reboot>restart</on_reboot>
<on_crash>destroy</on_crash>
<devices>
<console type='pty'>
<target type='lxc' port='0'/>
</console>
</devices>
</domain>
If your system doesn't support user namespace and your container has configure file,
then when you start container, this error will be threw out.
error: Failed to start domain xxx
error: internal error: guest failed to start: Kernel doesn't support user namespace:
If your configure file is right and the libvirt_lxc doesn't throw out error message,
it's a bug we should fix.
On 11/13/2013 01:24 PM, Saurabh Deochake wrote:
> Hi Gao,
>
> I checked the output of "lxc-checkconfig" command and it showed
>
> --- Namespaces ---
> Namespaces: enabled
> Utsname namespace: enabled
> Ipc namespace: enabled
> Pid namespace: enabled
> *User namespace: missing*
> Network namespace: enabled
> Multiple /dev/pts instances: enabled
>
> Here it shows that User namespace support is missing. I tried to check for Namespaces Support in kernel menuconfig. It has support for following namespaces only:
>
> --- Namespaces support
> [*] UTS namespace
> [*] IPC namespace
> [*] PID Namespaces
> [*] Network namespace
>
> There is no User Namespace support. So do I need to patch the kernel for user namespace support? What should I do in order to get user namespace working?
>
> Following are my system details:
> OS: Fedora 19
> Kernel: 3.9.5
>
Disable the xfs filesystem, and then you will see User namespace under Namespaces support.
Enjoy it.
Thanks
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