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