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