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