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