红帽全球峰会3.8. 为 Overcloud 节点获得镜像
director 需要以下几个磁盘镜像来部署 Overcloud 节点：
- 一个发现内核和 ramdisk - 用来在 PXE 引导时发现裸机系统。
- 一个实施内核和 ramdisk - 用于系统部署和实施。
- 一个 Overcloud 内核、ramdisk 和完整镜像 - 写到节点硬盘中的一个基本的 Overcloud 系统。
通过红帽客户门户网站的 Red Hat Enterprise Linux OpenStack Platform 下载页获得这些镜像（https://access.redhat.com/site/products/red-hat-enterprise-linux-openstack-platform/）。
把这些镜像下载到
stack 用户的家目录的 images 目录中（/home/stack/images/）。运行以下命令把这些镜像导入到 director：
openstack overcloud image upload
$ openstack overcloud image upload
这个命令会把
bm-deploy-kernel、bm-deploy-ramdisk、overcloud-full、overcloud-full-initrd 和 overcloud-full-vmlinuz 镜像上传到 director。这些是实施和 Overcloud 所需的镜像。这个脚本也会在 director 的 PXE 服务器上安装发现镜像。
使用以下命令在命令行中查看镜像列表：
这个列表没有显示发现 PXE 镜像（
discovery-ramdisk.*）。director 会把这些文件复制到 /httpboot。
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