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