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