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