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