[libvirt] OpenVZ capabilites in LibVIRT

[Anton Protopopov]

2008/11/10 Anton Protopopov <aspsk2 at gmail.com>

> Hi!
>
>>
>> I faced with several difficulties / misunderstandings and I hope someone
>> could clarify me (at the moment I use 'virsh' for testing).
>>
>> 1) after creating network via 'virsh # net-create network.xml' i get vzbr0
>> bridge in down state and have to make ip up manually. Is there any way to
>> automatically make it up?
>>
> You can specify an IP address and a netmask like this:
> http://libvirt.org/formatnetwork.html#elementsAddress
> Such bridge will be automatically set up.
>
>
>>  2) there is a default network "Default" with enabled 'Autostart'. Is
>> there any way to remove this network completely?
>>
> Yes,
> # virsh net-destroy defaul
>
correct answer is
# virsh net-undefine default


>
>
>
>>  3) after creating domain via 'virsh # create ovz.xml' i get a new
>> container, but it doesn't work as it should do:
>> - at first, it has 'vzbr0' veth interface inside and its pair on a HW node
>> is added into default bridge vmbr0. I believed tag <source bridge='vzbr0'/>
>> should point to a bridge name on a HW node, but instead it created veth
>> interface with such name. In openvz config file for created domain i see
>> this:
>>  [root at alt-03 ~]# cat /etc/vz/conf/3005.conf | grep NETIF
>>
>> NETIF="ifname=vzbr0,mac=52:54:00:35:10:6D,host_ifname=veth3005.0,host_mac=52:54:00:35:10:6D"
>>
> Short answer: it doesn't work now. Wait for nex libvirt release
> (libvirt-4.6-alt2). I will try to make it as soon as possible.
> For details see
> http://www.redhat.com/archives/libvir-list/2008-October/msg00323.html
>
>
>> 4) Is there any way to specify config file for created domain like it can
>> be done via 'vzctl create <ID> --oostemplate <templname> --config
>> <confname>'?
>>
> No
>
>
>>  5) Is there any way to destroy domain completely like it can be done via
>> 'vzctl destroy <ID>'?
>>
> Yes,
> # virsh destroy <domain-name>
>
And here too, if domain was previously defined, command must be:
# virsh undefine <domain-name>

>
>
>
>
>>  6) Where does libvirt store info about already created domains? I can't
>> create a new domain with ID 3005 after I completely destroy previous one via
>> 'vzctl destroy 3005'.
>>
> And what does it saying?
>
>  7) Is there any way to publish domain's console on a host system so that
>> I can connect via telnet to HW node on some TCP/4567 and get into domain's
>> console?
>>
> vzctl enter <domain ID>
>
>
>>  8) Does libvirt use some OpenVZ bindings or simply executes vzctl and
>> other stuff?
>>
> simply executes vzctl and reading/writing <veid>.conf
>
> P.S. You can ask ALT-specific questions to me directly.
>
>
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