On 3/27/2017 7:23 AM, Rui Chen wrote:
Hi:
A question about nova AddFixedIp API, nova api-ref[1] describe the
API as "Adds a fixed IP address to a server instance, which associates
that address with the server.", the argument of API is network id, so if
there are two or more subnets in a network, which one is lucky to
associate ip address to the instance? and the API behavior is always
consistent? I'm not sure.
The latest code[2] get all of the instance's ports and subnets of
the specified network, then loop them, but it return when the first
update_port success, so the API behavior depends on the order of subnet
and port list that return by neutron API. I have no idea about what
scenario we should use the API in, and the original design, anyone know
that?
[1]:
https://developer.openstack.org/api-ref/compute/#add-associate-fixed-ip-addfixedip-action
[2]:
https://github.com/openstack/nova/blob/master/nova/network/neutronv2/api.py#L1366
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I wondered about this API implementation myself awhile ago, see this bug
report for details:
https://bugs.launchpad.net/nova/+bug/1430512
There was a related change for this from garyk:
https://review.openstack.org/#/c/163864/
But that was abandoned.
I'm honestly not really sure what the direction is here. From what I
remember when I reported that bug, this was basically a feature-parity
implementation in the compute API for the multinic API with
nova-network. However, I'm not sure it's very usable. There is a Tempest
test for this API, but I think all it does is attach an interface and
make sure that does not blow up, it does not try to use the interface to
ssh into the guest, for example.
--
Thanks,
Matt
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