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