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