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