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+---
+title: "Pod 弹性伸缩"
+keywords: "Pod, 弹性伸缩, 弹性伸缩程序"
+description: "如何在 KubeSphere 上配置 Pod 弹性伸缩."
+weight: 10290
+
+---
+
+本文档描述了如何在 KubeSphere 上配置 Pod 弹性伸缩 (HPA)。
+
+HPA 功能会自动调整 Pod 的数量，将 Pod 的平均资源使用（CPU 和内存）保持在预设值附近。有关 HPA 功能的详细情况，请参见 [Kubernetes 官方文档](https://kubernetes.io/zh/docs/tasks/run-application/horizontal-pod-autoscale/)。
+
+本文档使用基于 CPU 使用率的 HPA 作为示例，基于内存使用量的 HPA 操作与其相似。
+
+## 准备工作
+
+- 您需要[启用 Metrics Server](../../../pluggable-components/metrics-server/)。
+- 您需要创建一个企业空间、一个项目以及一个帐户（例如，`project-regular`）。`project-regular` 必须被邀请至此项目中，并被赋予 `operator` 角色。有关更多信息，请参见[创建企业空间、项目、帐户和角色](../../../quick-start/create-workspace-and-project/)。
+
+## 创建服务
+
+1. 以 `project-regular` 身份登录 KubeSphere 的 Web 控制台，然后访问您的项目。 
+
+2. 在左侧导航栏中选择**应用负载**下的**服务**，然后点击右侧的**创建**。
+
+   ![create-service](/images/docs/zh-cn/project-user-guide/application-workloads/horizontal-pod-autoscaling/create-service.png)
+
+3. 在**创建服务**对话框中，点击**无状态服务**。
+
+   ![stateless-service](/images/docs/zh-cn/project-user-guide/application-workloads/horizontal-pod-autoscaling/stateless-service.png)
+
+4. 设置服务名称（例如，`hpa`），然后点击**下一步**。
+
+   ![service-name](/images/docs/zh-cn/project-user-guide/application-workloads/horizontal-pod-autoscaling/service-name.png)
+
+5. 点击**添加容器镜像**，将**镜像**设置为 `mirrorgooglecontainers/hpa-example` 并点击**使用默认端口**。
+
+   ![add-container-image](/images/docs/zh-cn/project-user-guide/application-workloads/horizontal-pod-autoscaling/add-container-image.png)
+
+6. 为每个容器设置 CPU 请求（例如，0.15 core），点击 **√**，然后点击**下一步**。
+
+   {{< notice note >}}
+
+   * 若要使用基于 CPU 使用率的 HPA，就必须为每个容器设置 CPU 请求，即为每个容器预留的最低 CPU 资源（有关详细信息，请参见 [Kubernetes 官方文档](https://kubernetes.io/zh/docs/tasks/run-application/horizontal-pod-autoscale/)）。HPA 功能会将 Pod 平均 CPU 使用率与 Pod 平均 CPU 请求的目标比率进行比较。
+   * 若要使用基于内存使用量的 HPA，则不需要配置内存请求。
+
+   {{</ notice >}}
+
+   ![cpu-request](/images/docs/zh-cn/project-user-guide/application-workloads/horizontal-pod-autoscaling/cpu-request.png)
+
+7. 点击**挂载存储**选项卡上的**下一步**，然后点击**高级设置**选项卡上的**创建**。
+
+## 配置 HPA
+
+1. 左侧导航栏上选择**工作负载**中的**部署**，然后点击右侧的 HPA 部署（例如，hpa-v1）。
+
+   ![hpa-deployment](/images/docs/zh-cn/project-user-guide/application-workloads/horizontal-pod-autoscaling/hpa-deployment.png)
+
+2. 点击**更多操作**，从下拉菜单中选择**弹性伸缩**。
+
+   ![horizontal-pod-autoscaling](/images/docs/zh-cn/project-user-guide/application-workloads/horizontal-pod-autoscaling/horizontal-pod-autoscaling.png)
+
+3. 在**弹性伸缩**对话框中，配置 HPA 参数，然后点击**确定**。
+
+   * **CPU 目标使用率**：Pod 平均 CPU 请求的目标比率。
+   * **内存目标使用量**：以 MiB 为单位的 Pod 平均内存目标使用量。
+   * **最小副本数**：Pod 的最小数量。
+   * **最大副本数**：Pod 的最大数量。
+
+   在示例中，**CPU 目标使用率**设置为 `60`，**最小副本数**设置为 `1`，**最大副本数**设置为 `10`。
+
+   {{< notice note >}}
+
+   当 Pod 的数量达到最大值时，请确保群集可以为所有 Pod 提供足够的资源。否则，一些 Pod 将创建失败。
+
+   {{</ notice >}}
+
+   ![hpa-parameters](/images/docs/zh-cn/project-user-guide/application-workloads/horizontal-pod-autoscaling/hpa-parameters.png)
+
+## 验证 HPA
+
+本节使用将请求发送到 HPA 服务的部署，以验证 HPA 是否会自动调整 Pod 的数量来满足资源使用目标。
+
+### 创建负载生成器部署
+
+1. 在左侧导航栏中选择**应用负载**中的**工作负载**，然后点击右侧的**创建**。
+
+   ![create-deployment](/images/docs/zh-cn/project-user-guide/application-workloads/horizontal-pod-autoscaling/create-deployment.png)
+
+2. 在**创建部署**对话框中，设置部署名称（例如，`load-generator`），然后点击**下一步**。
+
+   ![deployment-name](/images/docs/zh-cn/project-user-guide/application-workloads/horizontal-pod-autoscaling/deployment-name.png)
+
+3. 点击**添加容器镜像**，将**镜像**设置为 `busybox`。
+
+   ![busybox](/images/docs/zh-cn/project-user-guide/application-workloads/horizontal-pod-autoscaling/busybox.png)
+
+4. 在对话框中向下滚动，选择**启动命令**，然后将**运行命令**设置为 `sh,-c`，将**参数**设置为 `while true; do wget -q -O- http://<Target Service>.<Target project>.svc.cluster.local; done`（例如，`while true; do wget -q -O- http://hpa.demo-project.svc.cluster.local; done`）。
+
+   ![start-command](/images/docs/zh-cn/project-user-guide/application-workloads/horizontal-pod-autoscaling/start-command.png)
+
+5. 点击 **√**，然后点击**下一步**。
+
+6. 点击**挂载存储**选项卡上的**下一步**，然后点击**高级设置**选项卡上的**创建**。
+
+### 查看 HPA 部署状态
+
+1. 负载生成器部署创建好后，在左侧导航栏中选择**应用负载**下的**工作负载**，然后点击右侧的 HPA 部署（例如，hpa-v1）。
+
+   Pod 的数量会自动增加以满足资源使用目标。
+
+   ![target-cpu-utilization](/images/docs/zh-cn/project-user-guide/application-workloads/horizontal-pod-autoscaling/target-cpu-utilization.png)
+
+   ![pods-increase](/images/docs/zh-cn/project-user-guide/application-workloads/horizontal-pod-autoscaling/pods-increase.png)
+
+2. 在左侧导航栏选择**应用负载**中的**工作负载**，点击负载生成器部署（例如，load-generator-v1）右侧的三个点，从下拉菜单中选择**删除**。负载生成器部署删除后，再次检查 HPA 部署的状态。
+
+   Pod 的数量会减少到最小值。
+
+   ![pods-decrease](/images/docs/zh-cn/project-user-guide/application-workloads/horizontal-pod-autoscaling/pods-decrease.png)
+
+{{< notice note >}}
+
+系统可能需要一些时间来调整 Pod 的数量以及收集数据。
+
+{{</ notice >}}
+
+## 编辑 HPA 配置
+
+您可以重复[配置 HPA](#配置-hpa) 中的步骤来编辑 HPA 配置。
+
+## 取消 HPA
+
+1. 在左侧导航栏选择**应用负载**中的**工作负载**，点击右侧的 HPA 部署（例如，hpa-v1）。
+
+2. 点击**弹性伸缩**右侧的三个点，从下拉菜单中选择**取消**。
+
+   ![cancel-hpa](/images/docs/zh-cn/project-user-guide/application-workloads/horizontal-pod-autoscaling/cancel-hpa.png)
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