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