使用disk-image-builder（DIB）制作Ironic 裸金属镜像

export DIB_DEV_USER_USERNAME=centos
export DIB_DEV_USER_PASSWORD=123456
export DIB_DEV_USER_PWDLESS_SUDO=YES
export DIB_CLOUD_INIT_DATASOURCES="ConfigDrive, OpenStack"
disk-image-create centos7 baremetal dhcp-all-interfaces grub2 install-static devuser -o centos7 cloud-init-datasources