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