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