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