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