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