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