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