[Openstack] How to make Neutron select a specific subnet when boot an instance

Eugen Block eblock at nde.ag
Tue Jul 10 07:38:09 UTC 2018


There has been some work on this [2], but it didn't make it into the  
Kilo release (abandoned), and I don't see it either in later releases.

[2]  
https://blueprints.launchpad.net/nova/+spec/selecting-subnet-when-creating-vm


Zitat von Hang Yang <skinnyh92 at gmail.com>:

> Hi there,
>
> I have one question about choosing a specific subnet when boot a vm. My
> OpenStack cluster is in Queens and I have multiple subnets in one network.
> What I want is when I issue a boot command the instance only gets ip from
> one subnet by default. I know there is a way to achieve that by creating a
> port with --fixed-ip subnet=xxx then pass the port id to boot command.
> Wondering if there is another way that does not need manually create the
> port? Is there any configuration I can do to make it default for Neutron to
> only pick one subnet from a network in boot?
>
> Thanks for any help.
>
> Best regards,
> Hang






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