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