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