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