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