I've been dealing with this same issue with Rancher 2.6.11 upgrade from 2.5.17. My cluster agent pods show no errors and the last thing logged is "Starting Plan Monitoring"
05/03/2023, 1:46 PM
Hi, I think I managed to get it to work now. A bit funny how much time I spent on this and such a simple fix, hopefully it all works now 🙂
Changes I did to make it work
1. sudo docker run --privileged -d --restart=unless-stopped -p 80:80 -p 443:443 rancher/rancher:stable used to install it without the :stable which gave me a broken version
2. Used a normal ubuntu 20.4 server iso image for the rancher and then a focal-server-cloudimg-amd64.ova from https://cloud-images.ubuntu.com/focal/current/ as the template for newly created nodes