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