使用 IAP 保护 App Engine 应用

本页面介绍如何部署 App Engine 标准或柔性环境应用，以及如何使用 Identity-Aware Proxy (IAP) 为该应用提供保护。本快速入门提供了用于验证登录用户姓名的 App Engine 标准环境网页应用示例代码，

如果您打算通过内容分发网络 (CDN) 传送资源，请参阅最佳做法指南了解重要信息。

要保护非 Google Cloud 的资源，请参阅保护本地应用和资源。

准备工作

如需为 App Engine 启用 IAP，您需要以下各项：

  • 启用了结算功能的 Google Cloud 控制台项目。

如果您尚未设置 App Engine 实例，请参阅部署 App Engine，了解完整演示。

IAP 使用 Google 管理的 OAuth 客户端对用户进行身份验证。只有组织内的用户才能访问支持 IAP 的应用。如果您想允许组织外部用户访问，请参阅为外部应用启用 IAP。

启用 IAP

控制台

使用 Google Cloud 控制台启用 IAP 时，无法使用 Google 管理的 OAuth 客户端。

Dynamic include file

If you haven't configured your project's OAuth consent screen, you'll be prompted to do so. To configure your OAuth consent screen, see Setting up your OAuth consent screen.

Setting up IAP access

  1. Go to the Identity-Aware Proxy page.
    Go to the Identity-Aware Proxy page
  2. Select the project you want to secure with IAP.
  3. Select the checkbox next to the resource you want to grant access to.
  4. On the right side panel, click Add principal.
  5. In the Add principals dialog that appears, enter the email addresses of groups or individuals who should have the IAP-secured Web App User role for the project.

    The following kinds of principals can have this role:

    • Google Account: user@gmail.com
    • Google Group: admins@googlegroups.com
    • Service account: server@example.gserviceaccount.com
    • Google Workspace domain: example.com

    Make sure to add a Google Account that you have access to.

  6. Select Cloud IAP > IAP-secured Web App User from the Roles drop-down list.
  7. Click Save.

Turning on IAP

  1. On the Identity-Aware Proxy page, under APPLICATIONS, find the application you want to restrict access to. To turn on IAP for a resource,
  2. In the Turn on IAP window that appears, click Turn On to confirm that you want IAP to secure your resource. After you turn on IAP, it requires login credentials for all connections to your load balancer. Only accounts with the IAP-Secured Web App User role on the project will be given access.

gcloud

Before you set up your project and IAP, you need an up-to-date version of the gcloud CLI. For instructions on how to install the gcloud CLI, see Install the gcloud CLI.

  1. To authenticate, use the Google Cloud CLI and run the following command. 
    gcloud auth login
  2. Click the URL that appears and sign in.
  3. After you sign in, copy the verification code that appears and paste it in the command line.
  4. Run the following command to specify the project that contains the applications that you want to protect with IAP. 
    gcloud config set project PROJECT_ID
  5. To enable IAP, run the following command. 
    gcloud iap web enable --resource-type=app-engine --versions=version
  6. Add principals who should have the IAP-secured Web App user role to the project. 
    gcloud projects add-iam-policy-binding PROJECT_ID \
       --member=PRINCIPAL_IDENTIFIER \
       --role=roles/iap.httpsResourceAccessor
    • Replace PROJECT_ID with your project ID.
    • Replace PRINCIPAL_IDENTIFIER with the necessary principals. This can be a type of domain, group, serviceAccount, or user. For example, user:myemail@example.com.

After you enable IAP, you can use the gcloud CLI to modify the IAP access policy using the IAM role roles/iap.httpsResourceAccessor. Learn more about managing roles and permissions.

API

  1. 运行以下命令以准备 settings.json 文件。

    cat << EOF > settings.json
{
"iap":
  {
    "enabled":true
  }
}
EOF

  2. 运行以下命令以启用 IAP。

    curl -X PATCH \
-H "Authorization: Bearer $(gcloud auth print-access-token)" \
-H "Accept: application/json" \
-H "Content-Type: application/json" \
-d @settings.json \
"https://appengine.googleapis.com/v1/apps/PROJECT_ID?updateMask=iap"

启用 IAP 后，您可以使用 Google Cloud CLI 修改 使用 IAM 角色的 IAP 访问权限政策 roles/iap.httpsResourceAccessor。详细了解如何管理角色和权限。

测试用户身份验证

  1. 使用您添加到 IAP 且拥有 IAP-secured Web App User 角色的 Google 账号访问应用网址，如上所述。您应该对该应用具有不受限制的访问权限。

  2. 使用 Chrome 中的无痕式窗口访问该应用，并根据提示登录。如果您尝试使用未经 IAP-secured Web App User 角色授权的账号访问该应用，则会看到一条消息，提示您无权访问。

后续步骤