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