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[#]: publisher: " "
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[#]: url: " "
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Use Terraform to manage an OpenStack cluster
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使用 Terraform 来管理 OpenStack 集群
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======
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After having an OpenStack production and home lab for a while, I can definitively say that provisioning a workload and managing it from an Admin and Tenant perspective is important.
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在拥有一个 OpenStack 生产和家庭实验室一段时间后，我可以肯定地说，从管理员和租户的角度配置工作负载和管理它是很重要的。
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Terraform is an open source Infrastructure-as-Code (IaC) software tool used for provisioning networks, servers, cloud platforms, and more. Terraform is a declarative language that can act as a blueprint of the infrastructure you're working on. You can manage it with Git, and it has a strong [GitOps][1] use case.
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Terraform 是一个开源的基础设施即代码（IaC）软件工具，用于配置网络、服务器、云平台等。Terraform 是一种声明性语言，可以作为你正在进行的基础设施的蓝图。你可以用 Git 来管理它，它有一个强大的 [GitOps][1] 使用场景。
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This article covers the basics of managing an OpenStack cluster using Terraform. I recreate the OpenStack Demo project using Terraform.
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本文介绍了使用 Terraform 管理 OpenStack 集群的基础知识。我使用 Terraform 重新创建了 OpenStack 演示项目。
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### Install Terraform
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### 安装 Terraform
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I use CentOS as a jump host, where I run Terraform. Based on the official documentation, the first step is to add the Hashicorp repository:
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我使用 CentOS 作为跳板机运行 Terraform。根据官方文档，第一步是添加 Hashicorp 仓库：
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```
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$ sudo dnf config-manager \
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--add-repo https://rpm.releases.hashicorp.com/RHEL/hashicorp.repo
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```
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Next, install Terraform:
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接下来，安装 Terraform：
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```
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$ sudo dnf install terraform -y
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```
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Verify the installation:
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验证安装：
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```
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$ terraform –version
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```
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If you see a version number in return, you have installed Terraform.
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如果你看到返回的版本号，那么你已经安装了 Terraform。
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### Create a Terraform script for the OpenStack provider
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### 为 OpenStack provider 创建一个 Terraform 脚本
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In Terraform, you need a provider. A provider is a converter that Terraform calls to convert your `.tf` into API calls to the platform you are orchestrating.
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在 Terraform 中，你需要一个 provider。provider 是一个转换器，Terraform 调用它将你的 `.tf` 转换为对你正在协调的平台的 API 调用。
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There are three types of providers: Official, Partner, and Community:
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有三种类型的 provider：方、合作伙伴和社区：
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- Official providers are Hashicorp maintained.
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- Partner providers are maintained by technology companies that partner with Hashicorp.
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- Community providers are maintained by open source community members.
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- 官方 provider 由 Hashicorp 维护。
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- 合作伙伴 provider 由与 Hashicorp 合作的技术公司维护。
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- 社区 provider 是由开源社区成员维护的。
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There is a good Community provider for OpenStack in this [link][2]. To use this provider, create a `.tf` file and call it `main.tf`.
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在这个[链接][2]中有一个很好的 OpenStack 的社区 provider。要使用这个 provider，请创建一个 `.tf` 文件，并命名为 `main.tf`。
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```
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$ vi main.tf
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```
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Add the following content to `main.tf`:
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在 `main.tf` 中添加以下内容：
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```
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terraform {
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@ -77,15 +77,15 @@ provider "openstack" {
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}
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```
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You need to change the **OS_USERNAME**, **OS_TENANT**, **OS_PASSWORD**, **OS_AUTH_URL**, and **OS_REGION** variables for it to work.
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你需要修改 **OS_USERNAME**、**OS_TENANT**、**OS_PASSWORD**、**OS_AUTH_URL** 和 **OS_REGION** 变量才能工作。
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### Create an Admin Terraform file
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### 创建一个 Terraform 管理文件
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OpenStack Admin files focus on provisioning external networks, routers, users, images, tenant profiles, and quotas.
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OpenStack 管理文件的重点是配置外部网络、路由、用户、镜像、租户配置文件和配额。
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This example provisions flavors, a router connected to an external network, a test image, a tenant profile, and a user.
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此示例提供风格，连接到外部网络的路由、测试镜像、租户配置文件和用户。
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First, create an `AdminTF` directory for the provisioning resources:
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首先，为配置资源创建一个 `AdminTF` 目录：
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```
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$ mkdir AdminTF
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@ -93,7 +93,7 @@ $ mkdir AdminTF
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$ cd AdminTF
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```
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In the `main.tf`, add the following:
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在 `main.tf` 中，添加以下内容：
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```
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terraform {
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@ -200,20 +200,20 @@ resource "openstack_identity_user_v3" "demo-user" {
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}
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```
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### Create a Tenant Terraform file
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### 创建一个租户 Terraform 文件
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As a Tenant, you usually create VMs. You also create network and security groups for the VMs.
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作为一个租户，你通常会创建虚拟机。你还为这些虚拟机创建网络和安全组。
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This example uses the user created above by the Admin file.
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这个例子使用上面由 Admin 文件创建的用户。
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First, create a `TenantTF` directory for Tenant-related provisioning:
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首先，创建一个 `TenantTF` 目录，用于与租户相关的配置：
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```
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$ mkdir TenantTF
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$ cd TenantTF
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```
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In the `main.tf`, add the following:
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在 `main.tf` 中，添加以下内容：
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```
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terraform {
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@ -273,11 +273,11 @@ resource "openstack_compute_instance_v2" "demo-instance" {
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}
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```
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### Initialize your Terraform
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### 初始化你的 Terraform
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After creating the Terraform files, you need to initialize Terraform.
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创建 Terraform 文件后，你需要初始化 Terraform。
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For Admin:
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对于管理员：
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```
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$ cd AdminTF
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@ -287,7 +287,7 @@ $ terraform init
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$ terraform fmt
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```
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For Tenants:
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对于租户：
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```
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$ cd TenantTF
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@ -297,16 +297,16 @@ $ terraform init
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$ terraform fmt
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```
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Command explanation:
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命令解释：
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- `terraform init` downloads the provider from the registry to use in provisioning this project.
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- `terraform fmt` formats the files for use in repositories.
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- `terraform init` 从镜像源下载 provider 用于配置此项目。
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- `terraform fmt` 格式化文件，以便在仓库中使用。
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### Create a Terraform plan
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### 创建一个 Terraform 计划
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Next, create a plan for you to see what resources will be created.
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接下来，为你创建一个计划，看看将创建哪些资源。
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For Admin:
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对于管理员：
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```
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$ cd AdminTF
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@ -316,7 +316,7 @@ $ terraform validate
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$ terraform plan
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```
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For Tenants:
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对于租户：
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```
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$ cd TenantTF
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@ -326,16 +326,16 @@ $ terraform validate
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$ terraform plan
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```
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Command explanation:
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命令解释：
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- `terraform validate` validates whether the `.tf` syntax is correct.
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- `terraform plan` creates a plan file in the cache where all managed resources can be tracked in creation and destroy.
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- `terraform validate` 验证 `.tf` 语法是否正确。
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- `terraform plan` 在缓存中创建一个计划文件，所有管理的资源在创建和销毁时都可以被跟踪。
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### Apply your first TF
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### 应用你的第一个 TF
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To deploy the resources, use the `terraform apply` command. This command applies all resource states in the plan file.
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要部署资源，使用 `terraform apply` 命令。该命令应用计划文件中的所有资源状态。
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For Admin:
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对于管理员：
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```
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$ cd AdminTF
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@ -343,7 +343,7 @@ $ cd AdminTF
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$ terraform apply
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```
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For Tenants:
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对于租户：
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```
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$ cd TenantTF
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@ -351,9 +351,9 @@ $ cd TenantTF
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$ terraform apply
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```
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### Next steps
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### 接下来的步骤
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Previously, I wrote an [article][3] on deploying a minimal OpenStack cluster on a Raspberry Pi. You can discover how to have more detailed [Terraform and Ansible][4] configurations and implement some CI/CD with GitLab.
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之前，我写了一篇关于在树莓派上部署最小 OpenStack 集群的[文章][3]。你可以找到更详细的 [Terraform 和 Ansible][4] 配置，并通过 GitLab 实现一些 CI/CD。
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--------------------------------------------------------------------------------
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@ -361,7 +361,7 @@ via: https://opensource.com/article/23/1/terraform-manage-openstack-cluster
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作者：[AJ Canlas][a]
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选题：[lkxed][b]
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译者：[译者ID](https://github.com/译者ID)
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译者：[geekpi](https://github.com/geekpi)
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校对：[校对者ID](https://github.com/校对者ID)
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本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译，[Linux中国](https://linux.cn/) 荣誉推出
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