libvirt users - Jul 2014 - Re: How to get uuid info inside a lxc container created by libvirt_lxc

于 2014年07月08日 12:06, Eric Blake 写道:
> On 07/07/2014 10:02 PM, Qiang Guan wrote:
>> Hi ,
>>
>> Is there anyway to get uuid info inside a lxc container which is
created
>> by libvirt_lxc?
>>
>> For kvm, we can use dmidecode or lshw to get this info inside vm. Is
>> there any tools
>> to do this thing for libvirt lxc?
> Per the docs:
> http://libvirt.org/drvlxc.html#envvars
> pid 1 inside lxc inherits $container_uuid into its environment variables.
Thanks for help.
But in my lxc container, It seems no such envvars existed:

root@debian:~# ps auxf
USER       PID %CPU %MEM    VSZ   RSS TTY      STAT START   TIME COMMAND
root         1  0.0  0.1  10652   812 ?        Ss   03:42   0:00 init [2]
root      1317  0.0  0.4   9956  2572 ?        Ss   03:42   0:00 
dhclient -v -pf /run/dhclient.eth0.pid -lf 
/var/lib/dhcp/dhclient.eth0.leases eth0
root      1349  0.0  0.4   9956  2580 ?        Ss   03:42   0:00 
dhclient -v -pf /run/dhclient.eth1.pid -lf 
/var/lib/dhcp/dhclient.eth1.leases eth1
root      1493  0.0  0.2  49936  1212 ?        Ss   03:42   0:00 
/usr/sbin/sshd
root      2701  0.0  0.7  71296  3708 ?        Ss   04:10   0:00  \_ 
sshd: root@pts/1
root      2708  0.0  0.3  17876  2008 pts/1    Ss   04:10 0:00      \_ -bash
root      3048  0.0  0.2  15308  1112 pts/1    R+   04:16 0:00          
\_ ps auxf
root      1518  0.0  0.1  14580   868 pts/0    Ss+  03:42   0:00 
/sbin/getty 38400 console
root@debian:~# set | grep uuid
root@debian:~# echo $container_uuid

root@debian:~# echo $LIBVIRT_LXC_UUID

The version of libvirt I used is 1.1.4.
Do this libvirt version support the lxc envvars feature?
> -- 
> ------------
> Jackie
> Best Regards

At Tue, 08 Jul 2014 12:19:40 +0800,
Qiang Guan wrote:
> 
> 
> 于 2014年07月08日 12:06, Eric Blake 写道:
> > On 07/07/2014 10:02 PM, Qiang Guan wrote:
> >> Hi ,
> >>
> >> Is there anyway to get uuid info inside a lxc container which is
created
> >> by libvirt_lxc?
> >>
> >> For kvm, we can use dmidecode or lshw to get this info inside vm.
Is
> >> there any tools
> >> to do this thing for libvirt lxc?
> > Per the docs:
> > http://libvirt.org/drvlxc.html#envvars
> > pid 1 inside lxc inherits $container_uuid into its environment
variables.
> Thanks for help.
> But in my lxc container, It seems no such envvars existed:
Look at the environment of the process with PID 1:

# tr '\0' '\n' < /proc/1/environ

-- 
Claudio

于 2014年07月08日 14:54, Claudio Bley 写道:
> At Tue, 08 Jul 2014 12:19:40 +0800,
> Qiang Guan wrote:
>>
>> 于 2014年07月08日 12:06, Eric Blake 写道:
>>> On 07/07/2014 10:02 PM, Qiang Guan wrote:
>>>> Hi ,
>>>>
>>>> Is there anyway to get uuid info inside a lxc container which
is created
>>>> by libvirt_lxc?
>>>>
>>>> For kvm, we can use dmidecode or lshw to get this info inside
vm. Is
>>>> there any tools
>>>> to do this thing for libvirt lxc?
>>> Per the docs:
>>> http://libvirt.org/drvlxc.html#envvars
>>> pid 1 inside lxc inherits $container_uuid into its environment
variables.
>> Thanks for help.
>> But in my lxc container, It seems no such envvars existed:
> Look at the environment of the process with PID 1:
>
> # tr '\0' '\n' < /proc/1/environ
Ohh, understand. Thanks~
> -- 
> ------------
> Jackie
> Best Regards