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