[Openstack] Question about Flat DHCP networking

Aaron Rosen arosen at nicira.com
Sat Aug 18 08:01:43 UTC 2012


Hi Eugene,

I'm not sure I have not looked at the code (I'm guessing that it probably
keeps the lease around since it knows the VM is still active instead of
recycling the ip address). Though this is just a guess. You should look at
the implementation details if you are curious.

Aaron

On Sat, Aug 18, 2012 at 3:48 AM, Eugene Kirpichov <ekirpichov at gmail.com>wrote:

> Thanks. And how will n-net react?
>
>
>
> 18.08.2012, в 0:43, Aaron Rosen <arosen at nicira.com> написал(а):
>
> Hi Eugene,
>
> This means that if a VM stops it's DHCP client that nova-network will be
> aware of this since the VM will not attempt to renew it's DHCP lease.
>
> Aaron
>
> On Fri, Aug 17, 2012 at 5:58 PM, Eugene Kirpichov <ekirpichov at gmail.com>wrote:
>
>> Hi,
>>
>> The documentation
>>
>> http://docs.openstack.org/diablo/openstack-compute/admin/content/configuring-flat-dhcp-networking.html
>> has the passage: "The nova-network service will track leases and
>> releases in the database so it knows if a VM instance has stopped
>> properly configuring via DHCP"
>>
>> Can someone briefly explain me what this means, if possible with rough
>> pointers to code?
>> I don't recall nova noticing when my VM actually stopped properly
>> configuring via DHCP.
>>
>> --
>> Eugene Kirpichov
>> http://www.linkedin.com/in/eugenekirpichov
>>
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>
>
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