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