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