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