Bug 2010243

Summary: [OSP16.1][OVN] disable dhcp after network creation not updated metadata
Product: Red Hat OpenStack Reporter: Luigi Tamagnone <ltamagno>
Component: python-networking-ovnAssignee: Rodolfo Alonso <ralonsoh>
Status: CLOSED ERRATA QA Contact: Eduardo Olivares <eolivare>
Severity: high Docs Contact:
Priority: high    
Version: 16.1 (Train)CC: apevec, dalvarez, jpretori, jveiraca, lhh, majopela, ralonsoh, scohen, shtiwari
Target Milestone: z8Keywords: Triaged
Target Release: 16.1 (Train on RHEL 8.2)   
Hardware: x86_64   
OS: Linux   
Whiteboard:
Fixed In Version: python-networking-ovn-7.3.1-1.20211021113440.4e24f4c.el8ost Doc Type: No Doc Update
Doc Text:
Story Points: ---
Clone Of:
: 2015620 2018424 (view as bug list) Environment:
Last Closed: 2022-03-24 11:01:44 UTC Type: Bug
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On:    
Bug Blocks: 2015620, 2018424    

Description Luigi Tamagnone 2021-10-04 10:15:55 UTC
Description of problem:
Disable DHCP on a provider network after the creation didn't change the metadata information. 

Version-Release number of selected component (if applicable):
[rhosp-release] Red Hat OpenStack Platform release 16.1.6 GA (Train)
[os-release] Red Hat Enterprise Linux 8.2 (Ootpa) 8.2 (Ootpa)

Steps to Reproduce:
1. create a provider network with DHCP enabled
2. Disable DHCP on provider network
3. Launch an instance on this network, Openstack reserves an IP address in that network for the instance. However, the instance will never be reachable as it doesn't get its IP address configured. It didn't change if it is used config-drive or cloudinit for metadata propagation.

Actual results:
- In the case of the config drive, the network is labelled ipv4_dhcp:
~~~
  "networks": [
    {
      "id": "network0",
      "type": "ipv4_dhcp",
      "link": "tapxx-bf",
      "network_id": "xxx"
    }
~~
- In case of cloudinit, netplan:
~~~
network:
    ethernets:
        ens3:
            dhcp4: true
            match:
                macaddress: xxx
            set-name: ens3
    version: 2
~~~
However, the subnet to which these instances are attached has DHCP disabled:
~~~
$ openstack subnet show -f json xxx_subnet
{
  "allocation_pools": [
    {
      "start": "xxx",
      "end": "xxx"
    }
  ],
  "cidr": "xxx/21",
  "created_at": "2021-08-27T06:50:58Z",
  "description": "",
  "dns_nameservers": [
    "xxx",
    "xxx"
  ],
  "enable_dhcp": false,
  "gateway_ip": "xxx",
  "host_routes": [],
  "id": "xxx",
  "ip_version": 4,
  "ipv6_address_mode": null,
  "ipv6_ra_mode": null,
  "location": {
    "cloud": "",
    "region_name": "xxx",
    "zone": null,
    "project": {
      "id": "xxx",
      "name": "admin",
      "domain_id": null,
      "domain_name": "Default"
    }
  },
  "name": "xxx",
  "network_id": "xxx",
  "prefix_length": null,
  "project_id": "xxx",
  "revision_number": 1,
  "segment_id": null,
  "service_types": [],
  "subnetpool_id": null,
  "tags": [],
  "updated_at": "2021-09-27T09:40:15Z"
}
~~~

Expected results:
DHCP disable from metadata output

Comment 23 errata-xmlrpc 2022-03-24 11:01:44 UTC
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory (Red Hat OpenStack Platform 16.1.8 bug fix and enhancement advisory), and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2022:0986