#1065528 connman adds extra routes, which breaks network connectivity after installing k3s

Package:
connman
Source:
connman
Description:
Intel Connection Manager daemon
Submitter:
Sayan Naskar
Date:
2024-03-06 05:45:04 UTC
Severity:
normal
#1065528#5
Date:
2024-03-06 05:44:09 UTC
From:
To:
Dear Maintainer,

I have a VM on which I installed Debian + LXQT desktop.
connman daemon adds extra routes to the machine, which normally works fine.
However, when I install k3s, it adds extra routes to the routing table, which affects the connectivity to and from the VM.
Any IP outside the local network (network CIDR for the VM) is not pingable / reachable.
I reported the issue on k3s, but later on debugged the issue to root cause to connman.
The original issue with some ip routes, journalctl logs, etc. can be found at https://github.com/k3s-io/k3s/issues/9625

The issue gets resolved after stopping the systemd unit service and rebooting.