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