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