openvSwitch 도커 kubeadm 리눅스설정 ebpf ubuntu nvcc net-scripts dns 쿠버네티스 인증서 x509 ovpn nvidia-smi uprobe jaeger-ceph ovs bind9 vagrant-libvirt ceph libvirt ceph-osd localGPT bpf_trace_printk yt-dlp BPF libvirt-vagrant docker 도커 레지스트리 klosedstack vagrant