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