openstack team mailing list archive

[Nathanael Burton <nathanael.i.burton@xxxxxxxxx>]

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.

Thanks

Nate
On Jun 11, 2012 2:09 PM, "Lorin Hochstein" <lorin@xxxxxxxxxxxxxxxxxx> 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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