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