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