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