I have just updated to latest Z2JH (2.0.0) to see if the error was gone, but not.
15:55 # kubectl logs -f -n jupyterhub-test jupyter-laville block-cloud-metadata modprobe: can't change directory to '/lib/modules': No such file or directory iptables v1.8.8 (legacy): can't initialize iptables table `filter': Table does not exist (do you need to insmod?) Perhaps iptables or your kernel needs to be upgraded.
The underlying nodes don’t have iptables module anymore , but rather nftables.
this is the node:
[root@ops-k1n43 ~]# iptables iptables v1.8.4 (nf_tables): no command specified Try `iptables -h' or 'iptables --help' for more information.