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