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