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