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