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