this is a neutron bug not a nova one.
the behavior should not change between using the dhcp aganet and native
dhcp
** Also affects: neutron
Importance: Undecided
Status: New
** Changed in: nova
Status: In Progress => Invalid
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https://bugs.launchpad.net/bugs/2055245
Title:
DHCP Option is not passed to VM via Cloud-init
Status in neutron:
New
Status in OpenStack Compute (nova):
Invalid
Bug description:
Description
===========
Nova-Metadata-API doesn't provide ipv4_dhcp type for OVN (native OVH
DHCP feature, no DHCP agents) networks with dhcp_enabled but no
default gateway.
Problem seems to be in
https://opendev.org/openstack/nova/src/branch/master/nova/network/neutron.py#L3617
There is just an exception to networks without device_owner:
network:dhcp where default gateway is used, which doesn't cover this
case.
Steps to reproduce
==================
Create a OVN network in an environment where native DHCP feature is
provided by ovn (no ml2/ovs DHCP Agents). In addition this network
needs to have no default gateway enabled.
Create VM in this network and observe the cloud-init process
(network_data.json)
Expected result
===============
network_data.json
(http://169.254.169.254/openstack/2018-08-27/network_data.json) should
return something like:
{
"links": [
{
"id": "tapddc91085-96",
"vif_id": "ddc91085-9650-4b7b-ad9d-b475bac8ec8b",
"type": "ovs",
"mtu": 1442,
"ethernet_mac_address": "fa:16:3e:93:49:fa"
}
],
"networks": [
{
"id": "network0",
"type": "ipv4_dhcp",
"link": "tapddc91085-96",
"network_id": "9f61a3a7-26d3-4013-b61d-12880b325ea9"
}
],
"services": []
}
Actual result
=============
{
"links": [
{
"id": "tapddc91085-96",
"vif_id": "ddc91085-9650-4b7b-ad9d-b475bac8ec8b",
"type": "ovs",
"mtu": 1442,
"ethernet_mac_address": "fa:16:3e:93:49:fa"
}
],
"networks": [
{
"id": "network0",
"type": "ipv4",
"link": "tapddc91085-96",
"ip_address": "10.0.0.40",
"netmask": "255.255.255.0",
"routes": [],
"network_id": "9f61a3a7-26d3-4013-b61d-12880b325ea9",
"services": []
}
],
"services": []
}
Environment
===========
Openstack Zed with Neutron OVN feature enabled
Nova: 26.2.1
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