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