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