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