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