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