云计算|OpenStack|社区版OpenStack安装部署文档（一 --- 前期硬件准备和部署规划）

OpenStack Wallaby is available for CentOS Stream 8. OpenStack Ussuri and Victoria are available for both CentOS 8 and RHEL 8. OpenStack Train and earlier are available on both CentOS 7 and RHEL 7.
OpenStack Wallaby适用于CentOS Stream 8。CentOS 8和RHEL 8均可使用OpenStack Ussuri和Victoria。CentOS 7和RHEL 7上都有OpenStack Train和更早版本。

Starting with the Ussuri release, you will need to use either CentOS8 or RHEL 8. Previous OpenStack releases will need to use either CentOS7 or RHEL 7. Instructions are included for both distributions and versions where different.
从Ussuri版本开始，您将需要使用CentOS8或RHEL 8。之前的OpenStack版本需要使用CentOS7或RHEL 7。不同的发行版和版本都包含说明。

For best performance, we recommend that your environment meets or exceeds the hardware requirements in Hardware requirements.
The following minimum requirements should support a proof-of-concept environment with core services and several CirrOS instances:
Controller Node: 1 processor, 4 GB memory, and 5 GB storage
Compute Node: 1 processor, 2 GB memory, and 10 GB storage
为了获得最佳性能，我们建议您的环境满足或超过硬件要求中的硬件要求。 以下最低要求应支持具有核心服务和多个CirrOS实例的概念验证环境: 控制器节点:1个处理器、4 GB内存和5 GB存储 计算节点:1个处理器、2 GB内存和10 GB存储

Example architecture¶
The example architecture requires at least two nodes (hosts) to launch a basic virtual machine or instance. Optional services such as Block Storage and Object Storage require additional nodes.
 Important
The example architecture used in this guide is a minimum configuration, and is not intended for production system installations. It is designed to provide a minimum proof-of-concept for the purpose of learning about OpenStack. For information on creating architectures for specific use cases, or how to determine which architecture is required, see the Architecture Design Guide.
This example architecture differs from a minimal production architecture as follows:
Networking agents reside on the controller node instead of one or more dedicated network nodes.
Overlay (tunnel) traffic for self-service networks traverses the management network instead of a dedicated network.
示例架构 示例体系结构需要至少两个节点(主机)来启动基本虚拟机或实例。块存储和对象存储等可选服务需要额外的节点。 重要的 本指南中使用的示例体系结构是最低配置，不适用于生产系统安装。它旨在为学习OpenStack提供最低限度的概念验证。有关为特定用例创建体系结构的信息，或者如何确定需要哪种体系结构，请参见体系结构设计指南。 该示例体系结构与最小生产体系结构的不同之处如下: 网络代理驻留在控制器节点上，而不是一个或多个专用网络节点上。 自助服务网络的覆盖(隧道)流量穿过管理网络，而不是专用网络。