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