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