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