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