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