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