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