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