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