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