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