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