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