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