[one-users] Setting up VMs to use existing DHCP server

[Beng Heng Ng]

Thanks Olivier, for your suggestion.

For experimentation, I simply added the following line into the VM template:

NIC=[ MAC="00:02:01:23:45:67" ]

But I have been getting permission denied errors.

[DiM][I]: New VM state is ACTIVE.
[LCM][I]: New VM state is PROLOG.
[VM][I]: Virtual Machine has no context
[TM][I]: clone: Cloning ../../100/e5a9999ab1f71f0e5c11fbf47e3f9c47 in
london:/srv/cloud/one/var//datastores/0/84/disk.0
[TM][I]: ExitCode: 0
[LCM][I]: New VM state is BOOT
[VMM][I]: Generating deployment file: /srv/cloud/one/var/84/deployment.0
[VMM][I]: ExitCode: 0
[VMM][I]: Successfully execute network driver operation: pre.
[VMM][I]: Command execution fail: cat << EOT |
/var/tmp/one/vmm/kvm/deploy
/srv/cloud/one/var//datastores/0/84/deployment.0 vmserver 84 vmserver
[VMM][I]: error: Failed to create domain from
/srv/cloud/one/var//datastores/0/84/deployment.0
[VMM][I]: error: internal error process exited while connecting to
monitor: kvm: -netdev tap,id=hostnet0: could not configure
/dev/net/tun: Operation not permitted
[VMM][I]: kvm: -netdev tap,id=hostnet0: Device 'tap' could not be initialized
[VMM][I]:
[VMM][E]: Could not create domain from
/srv/cloud/one/var//datastores/0/84/deployment.0
[VMM][I]: ExitCode: 255
[VMM][I]: Failed to execute virtualization driver operation: deploy.
[VMM][E]: Error deploying virtual machine: Could not create domain
from /srv/cloud/one/var//datastores/0/84/deployment.0
[DiM][I]: New VM state is FAILED

I have tried changing the group for /dev/net/tun to "cloud", which
corresponds to the group value in /etc/libvirt/qemu.conf. I've also
tried modifying /etc/libvirt/qemu.conf for the cgroup_device_acl field
as follows.

cgroup_device_acl = [
    "/dev/null", "/dev/full", "/dev/zero",
    "/dev/random", "/dev/urandom",
    "/dev/ptmx", "/dev/kvm", "/dev/kqemu",
    "/dev/rtc", "/dev/hpet",
    "/dev/net/tun",
]

What else could be wrong? Thanks.

Cheers,
Beng Heng


On Thu, Jun 28, 2012 at 4:34 AM, Olivier Sallou <olivier.sallou at irisa.fr> wrote:
>
> Le 6/28/12 6:13 AM, Beng Heng Ng a écrit :
>> Hi,
>>
>> I am trying to setup OpenNebula for our research work.
>>
>> For now, we have one machine with a single NIC to experiment with. How
>> can one configure a guest to use DHCP for getting an IP address? I
>> know one can specify leases (as described here
>> http://opennebula.org/documentation:archives:rel3.0:vgg) in the
>> virtual network template file. However, we do not have access to the
>> DHCP server, thus it is not possible for us to specify the IPs.
>>
>> The solutions suggested here
>> (http://lists.opennebula.org/pipermail/users-opennebula.org/2010-November/003349.html)
>> involves setting up a virtual DHCP server or knowing in advance the IP
>> ranges. But are there any ways to request IPs from the existing DHCP
>> server directly?
> You can configure a network in OpenNebula that defines only MAC
> addresses (range of virtual ones).
> Then, all you need is to have images with network config configured for
> DHCP. Your DHCP will answer to the request.
> This is not a requirement that OpenNebula manage the IPs, this is only a
> feature.
>
> Olivier
>>
>> Thanks in advance.
>> Beng Heng
>> _______________________________________________
>> Users mailing list
>> Users at lists.opennebula.org
>> http://lists.opennebula.org/listinfo.cgi/users-opennebula.org
>>
>>
>
> --
> Olivier Sallou
> IRISA / University of Rennes 1
> Campus de Beaulieu, 35000 RENNES - FRANCE
> Tel: 02.99.84.71.95
>
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> Key fingerprint = 5FB4 6F83 D3B9 5204 6335  D26D 78DC 68DB 326D 8438
>
>
>
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