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