ovs-configuration.service via DHCP (Error: failed to modify connection.slave-type)

[pavel-veber]

Describe the bug

When installing OKD, everything is fine, the cluster is working, the nodes are Ready.
After reboot, the network is not working(ssh only) and there is an error in ovs-configuration.service:

 configure-ovs.sh[1752]: + nmcli c add type ovs-port conn.interface ens18 master br-ex con-name ovs-port-phys0 connection.autoconnect-slaves 1 connection.autoconnect no
 configure-ovs.sh[1917]: Error: failed to modify connection.slave-type: 'ovs-interface' not among [bond, bridge, ovs-bridge, ovs-port, team, vrf].
 configure-ovs.sh[1752]: ++ handle_exit
 configure-ovs.sh[1752]: ++ e=2

Version

OKD: 4.15.0-0.okd-2024-03-10-010116 bare-metal UPI hosts with OVNKubernetes.
Network: One ethernet port.
Boot: via iPXE (ip=dhcp).

How reproducible

In my case, it is reproduced frequently, about 99%.
And it rarely happens that it is necessary to load.

Log bundle

master-1_first_boot.log

master-1_after_reboot.log

However there is workaround is remove MN keyfile
[root@master-1 ~]# rm -v /etc/NetworkManager/system-connections/ovs-if-br-ex-108d42c4-d0b9-4064-a40f-117e35fa1ef5.nmconnection && systemctl reboot

[pavel-veber]

The features that I noticed:

• OpenShift Bugs has a very similar task OCPBUGS-41489.
  I tried to apply the script /usr/local/bin/configure-ovs.sh with their changes, the error persists
• if the network is configured statically via kernel arguments, everything works fine.