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