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