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