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