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