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