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