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