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