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