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