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