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