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