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