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