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