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