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