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