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