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