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