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