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