Kubeadm tips

Auto clean kubeadm backups

This command configures tmp systemd-tmpfiles-clean to delete kubeadm backups older than 6 months

cat << EOF >> /etc/tmpfiles.d/kubeadm-tmp.conf
e    /etc/kubernetes/tmp/kubeadm*        -    -    -    6M
EOF

And execute it with

systemd-tmpfiles --clean /etc/tmpfiles.d/kubeadm-tmp.conf

Or restart the service

systemctl restart systemd-tmpfiles-clean.service