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