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