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