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