Bug 1934736

Summary: ovn_migration.sh script doesn't detect neutron_dhcp agents when they run on a different node than neutron_api
Product: Red Hat OpenStack Reporter: Ladislav Jozsa <ljozsa>
Component: python-networking-ovnAssignee: Jakub Libosvar <jlibosva>
Status: CLOSED ERRATA QA Contact: Roman Safronov <rsafrono>
Severity: medium Docs Contact:
Priority: high    
Version: 16.1 (Train)CC: apevec, chrisw, egarciar, eolivare, jlibosva, jmelvin, lhh, majopela, oblaut, rsafrono, scohen
Target Milestone: z7Keywords: Triaged
Target Release: 16.1 (Train on RHEL 8.2)   
Hardware: Unspecified   
OS: Linux   
Whiteboard:
Fixed In Version: python-networking-ovn-7.3.1-1.20210713093309.4e24f4c.el8ost Doc Type: No Doc Update
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2021-12-09 20:18:00 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:

Description Ladislav Jozsa 2021-03-03 18:22:21 UTC 
Description of problem:
hosts_for_migration/[ovn-dbs] host group is populated wrongly and doesn't consider neutron_dhcp containers running elsewhere than neutron_server. 

Version-Release number of selected component (if applicable):
python3-networking-ovn-migration-tool-7.3.1-1.20200902233413.el8ost.noarch (RHOS 16.1.3)

How reproducible:
always

Steps to Reproduce:
1. Install overcloud with split control plane having neutron_dhcp and neutron_api running on distinct nodes
2.
3.

Actual results:
[ovn-dbs]
ctrl-net-c-01 ansible_host=10.0.37.45 ovn_central=true ansible_ssh_user=stack ansible_become=true
ctrl-net-c-02 ansible_host=10.0.37.21 ansible_ssh_user=stack ansible_become=true
ctrl-net-c-03 ansible_host=10.0.36.66 ansible_ssh_user=stack ansible_become=true
ctrl-net-c-04 ansible_host=10.0.37.139 ansible_ssh_user=stack ansible_become=true

[ovn-controllers]
compute-net-c-001 ansible_host=10.0.36.225 ansible_ssh_user=stack ansible_become=true ovn_controller=true
compute-net-c-002 ansible_host=10.0.36.152 ansible_ssh_user=stack ansible_become=true ovn_controller=true
ctrl-nova-c-01 ansible_host=10.0.37.104 ansible_ssh_user=stack ansible_become=true ovn_controller=true
ctrl-nova-c-02 ansible_host=10.0.37.15 ansible_ssh_user=stack ansible_become=true ovn_controller=true
ctrl-nova-c-03 ansible_host=10.0.37.8 ansible_ssh_user=stack ansible_become=true ovn_controller=true


Expected results:
[ovn-dbs]
compute-net-c-001 ansible_host=10.0.36.225 ansible_ssh_user=stack ansible_become=true
compute-net-c-002 ansible_host=10.0.36.152 ansible_ssh_user=stack ansible_become=true


[ovn-controllers]
compute-net-c-001 ansible_host=10.0.36.225 ansible_ssh_user=stack ansible_become=true ovn_controller=true
compute-net-c-002 ansible_host=10.0.36.152 ansible_ssh_user=stack ansible_become=true ovn_controller=true
ctrl-nova-c-01 ansible_host=10.0.37.104 ansible_ssh_user=stack ansible_become=true ovn_controller=true
ctrl-nova-c-02 ansible_host=10.0.37.15 ansible_ssh_user=stack ansible_become=true ovn_controller=true
ctrl-nova-c-03 ansible_host=10.0.37.8 ansible_ssh_user=stack ansible_become=true ovn_controller=true


Additional info:
Reproducible in PSI
Comment 4 Yaniv Kaul 2021-07-28 14:02:59 UTC 
I assume this is also fixed in 16.2? ( thought there'd be a clone BZ)
Comment 5 Jakub Libosvar 2021-07-28 15:21:49 UTC 
(In reply to Yaniv Kaul from comment #4)
> I assume this is also fixed in 16.2? ( thought there'd be a clone BZ)

It is fixed in 16.2, it got there from upstream stable Train release import. There is no BZ for 16.2 because of the upstream fix.
Comment 10 Roman Safronov 2021-08-16 08:34:18 UTC 
Was verified on RHOS-16.1-RHEL-8-20210804.n.0 with python3-networking-ovn-7.3.1-1.20210714143305.4e24f4c.el8ost.noarch and  python3-networking-ovn-migration-tool-7.3.1-1.20210714143305.4e24f4c.el8ost.noarch.
Tested on a composable roles environment where neutron_dhcp and neutron_api were running on distinct nodes (networkers and controllers respectively).
Checked that ovn_migration.sh script was able to detect neutron_dhcp agents when they run on a different node than neutron_api. Ansible inventory file was created properly.
Comment 22 errata-xmlrpc 2021-12-09 20:18:00 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 16.1.7 (Train) 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-2021:3762