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