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