Open Stack

Lorin, Diego,

I wrote up a pastebin of setting up an example dnsmasq.conf file,
setting it within nova.conf, patching linux_net.py (in stable/essex),
and showing the example dhcp leases file which set custom values for
the router, ntp-server, and dns-server using the dnsmasq conf and tags
based on the network label field within the network defined within
nova.  The same process should work with both FlatDHCP or VLANManager.

http://paste.openstack.org/show/18471/

Thanks,

Nate

On Mon, Jun 11, 2012 at 10:17 PM, Lorin Hochstein
<lorin at nimbisservices.com> wrote:
> Hey Nate:
>
> On Jun 11, 2012, at 2:17 PM, Nathanael Burton wrote:
>
> dnsmasq supports setting parameters such as the gateway IP and other
> settings based on tag. I have run a patched version of nova-network in the
> Diablo time that used the network DB label field as the network tag in
> dnsmasq. This then allows you to set custom configs by modifying the
> dnsmasq.conf file. This was done with VLANmanager.
>
>
>
> Are you able to share an exampleof a dnsmasq.conf file that uses tags to
> handle different config settings per network/VLAN?
>
>
> Take care,
>
> Lorin
> --
> Lorin Hochstein
> Lead Architect - Cloud Services
> Nimbis Services, Inc.
> www.nimbisservices.com
>
>
>
> Thanks
>
> Nate
>
> On Jun 11, 2012 2:09 PM, "Lorin Hochstein" <lorin at nimbisservices.com> wrote:
>>
>>
>> On Jun 4, 2012, at 8:22 PM, romi zhang wrote:
>>
>> Hi,
>>
>> I am using VLAN network mode and will connect eth1 and eth2 of my compute
>> node to the LAN Switch, and LAN switch will create individual VLAN IP
>> interface for each Tenant/VLAN and then route to the NAT equipment,through
>> SNAT/DNAT to touch internet. So, that needs I can set the default gateway of
>> each Tenant VLAN to the different IP address of VLAN interface on the
>> switch.
>>
>>
>> I have the same question, I would love to know if you can set the gateways
>> in VLAN mode.
>>
>>
>> For example, my first tenant(auto0Tenant) is at VLAN200/br200/eth1/fix_ip
>> range is 192.168.2.0/28 and second(aotu1Tenant) is
>> VLAN300/br300/eth2/fix_ip_range 192.168.3.0/28, the VLAN interface ip
>> address for them on switch is 192.168.2.9 and 192.168.3.9, I want to set the
>> default gateway of VMs in auto0Tenant to 192.168.2.9 and 192.168.3.9 for
>> aotu1Tenant’s VMs.
>>
>> I try to use two methods, the first is to use nova-command:
>>
>> nova-manage network create --label=auto0Tenat
>> --fixed_range_v4=192.168.2.0/28 --num_networks=1 --gateway=192.168.2.9
>> --dns1=61.139.2.69 --vlan=200 --bridge=br200 --bridge_interface=eth1
>> --network_size=16 --multi_host=T
>> --project_id=5f9281bca6854fe3974a457d81afd78c
>>
>> nova-manage network create --label=aotu1Tenant
>> --fixed_range_v4=192.168.3.0/28 --num_networks=1 --gateway=192.168.3.9
>> --dns1=61.139.2.69 --vlan=300 --bridge=br300 --bridge_interface=eth2
>> --network_size=16 --multi_host=T
>> --project_id=5f9281bca6854fe3974a457d81afd78c
>>
>> but the result is the newest created VM default gateway is still the IP
>> address of br200 or br300 by the system, that means the factor of “gateway”
>> and “dns1” in nova-mange network command did not work.
>>
>> The second way is to use dnsmasq.conf that Vish told me, that I set just
>> dhcp_option=3,192.168.2.9. Yes it is useful for auto0Tenat VLAN, it can set
>> auto0Tenant gateway to 192.168.2.9, but how to set others at the same time?
>>
>> Then I tried to use:
>>
>> Interface=vlan200
>> dhcp_option=3,192.168.2.9
>>
>> Interface=vlan300
>> dhcp_option=3,192.168.3.9
>>
>>
>>
>> Does it actually work to specify multiple interfaces in the dnsmasq conf
>> file like that? I would have thought that the second values would override
>> the first ones.
>>
>>
>> Take care,
>>
>> Lorin
>> --
>> Lorin Hochstein
>> Lead Architect - Cloud Services
>> Nimbis Services, Inc.
>> www.nimbisservices.com
>>
>>
>>
>>
>>
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>