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