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