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