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