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