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