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