當您對 API 進行了向下相容現有客戶端程式碼的變更時，最佳做法是，在部署新版本之前增加 API 的次要版本編號。雖然 Cloud Endpoints 一次只執行一個次要版本的 API，但是「Endpoints」>「Services」(服務) 中的圖形和記錄會顯示版本編號。透過在部署前增加次要版本編號，圖形和記錄可提供部署的標籤歷程。
info:description:"A simple Cloud Endpoints API example."title:"Endpoints Example"version:"1.1"host:"echo-api.endpoints.example-project-12345.cloud.goog"basePath:"/v1"
在 openapi-v2.yaml 中設定下列項目：
進行回溯不相容的變更。
將 info.version 欄位設為新版本編號。
將 basePath 欄位設為包含新的主要版本編號。
移除 x-google-endpoints 區段。如果您要指定 DNS IP 位址或 allowCors 標記，就需要使用這個部分。使用兩個 yaml 設定檔部署兩個 API 版本時，只有其中一個可以有 x-google-endpoints，但其設定會套用至兩個版本。
例如：
info:description:"A simple Google Cloud Endpoints API example."title:"Endpoints Example"version:"2.0"host:"echo-api.endpoints.example-project-12345.cloud.goog"basePath:"/v2"
[[["容易理解","easyToUnderstand","thumb-up"],["確實解決了我的問題","solvedMyProblem","thumb-up"],["其他","otherUp","thumb-up"]],[["難以理解","hardToUnderstand","thumb-down"],["資訊或程式碼範例有誤","incorrectInformationOrSampleCode","thumb-down"],["缺少我需要的資訊/範例","missingTheInformationSamplesINeed","thumb-down"],["翻譯問題","translationIssue","thumb-down"],["其他","otherDown","thumb-down"]],["上次更新時間：2025-09-04 (世界標準時間)。"],[[["\u003cp\u003eThis document outlines procedures for updating API versions, differentiating between backwards-compatible and backwards-incompatible changes.\u003c/p\u003e\n"],["\u003cp\u003eFor backwards-compatible changes, it's recommended to increment the minor version number in the \u003ccode\u003einfo.version\u003c/code\u003e field of the \u003ccode\u003eopenapi.yaml\u003c/code\u003e file and then deploy using the Google Cloud CLI.\u003c/p\u003e\n"],["\u003cp\u003eWhen introducing backwards-incompatible changes, it's recommended to increment the major version number and create separate OpenAPI configuration files for each version.\u003c/p\u003e\n"],["\u003cp\u003eTo deploy multiple major versions concurrently, each version should have its own configuration file (e.g., \u003ccode\u003eopenapi-v1.yaml\u003c/code\u003e, \u003ccode\u003eopenapi-v2.yaml\u003c/code\u003e) with distinct \u003ccode\u003ebasePath\u003c/code\u003e values and the \u003ccode\u003ex-google-endpoints\u003c/code\u003e section removed from all but one configuration.\u003c/p\u003e\n"],["\u003cp\u003eAfter the deployment of the API configuration files, a single backend must be deployed that services both versions of the API.\u003c/p\u003e\n"]]],[],null,["# Versioning an API\n\nOpenAPI \\| gRPC\n\n\u003cbr /\u003e\n\nThis page provides detailed configuration and deployment procedures for changing\nthe version number of your API. The procedure that you use depends on whether\nthe changes to your API are backwards compatible.\n\n- If your new API version has backwards-compatible changes, such as adding new fields or methods, see [Backwards-compatible changes](#backwards-compatible).\n- If your new API has changes to an existing method that breaks your customers' client code, see [Backwards-incompatible changes](#backwards-incompatible).\n\nFor additional information and best practices, see\n[API lifecycle management](/endpoints/docs/openapi/lifecycle-management).\n\nBackwards-compatible changes\n----------------------------\n\nWhen you make changes to your API that are backwards compatible with\nexisting client code, as a best practice, increment the minor version number of\nyour API before you deploy the new version. Although Cloud Endpoints runs only\none minor version of an API at a time, the graphs and logs in\n**Endpoints** \\\u003e **Services** display the version number. By incrementing the\nminor version number before you deploy, the graphs and logs provide a labeled\nhistory of your deployments.\n\nTo increment the minor version number:\n\n1. In `openapi.yaml`, increment the minor version number of the\n `info.version` field. For example, if the current version is `1.1`, set\n `info.version` to `1.2`:\n\n info:\n description: \"A simple Cloud Endpoints API example.\"\n title: \"Endpoints Example\"\n version: \"1.2\"\n host: \"echo-api.endpoints.example-project-12345.cloud.goog\"\n\n2. Use the Google Cloud CLI to deploy the API configuration:\n\n gcloud endpoints services deploy openapi.yaml\n\n3. Deploy the API backend by using the configuration ID returned from the\n previous step. For details, see\n [Deploying the API backend](/endpoints/docs/openapi/deploy-api-backend).\n\nBackwards-incompatible changes\n------------------------------\n\nWhen you make changes to your API that breaks your customers' client\ncode, as a best practice, increment the major version number of your API.\nEndpoints can run more than one major version of an API\nconcurrently. By providing both versions of the API, your customers can pick\nwhich version they want to use and control when they migrate to the new version.\n\nTo run the existing and new versions of an API concurrently:\n\n1. Create separate OpenAPI configuration files for each version you need to\n serve. This procedure uses the file names `openapi-v1.yaml` and\n `openapi-v2.yaml` for example purposes.\n\n2. Copy the contents of `openapi-v1.yaml` to `openapi-v2.yaml`.\n\n3. In `openapi-v1.yaml` configure the following:\n\n - Set the `info.version` field to the existing version number.\n - Leave the `basePath` field unchanged.\n\n For example: \n\n info:\n description: \"A simple Cloud Endpoints API example.\"\n title: \"Endpoints Example\"\n version: \"1.1\"\n host: \"echo-api.endpoints.example-project-12345.cloud.goog\"\n basePath: \"/v1\"\n\n4. In `openapi-v2.yaml` configure the following:\n\n - Make backwards-incompatible changes.\n - Set the `info.version` field to the new version number.\n - Set the `basePath` field to include the new major version number.\n - Remove the `x-google-endpoints` section. This section is needed if you want to specify DNS IP address or `allowCors` flag. When deploying two versions of the API with two yaml config files, only one of them can have `x-google-endpoints`, but its config will apply to both versions.\n\n For example: \n\n info:\n description: \"A simple Google Cloud Endpoints API example.\"\n title: \"Endpoints Example\"\n version: \"2.0\"\n host: \"echo-api.endpoints.example-project-12345.cloud.goog\"\n basePath: \"/v2\"\n\n5. Use the Google Cloud CLI to deploy both API configuration files:\n\n gcloud endpoints services deploy openapi-v1.yaml openapi-v2.yaml\n\n | **Note:** Cloud Endpoints internally converts your multiple OpenAPI configuration files into a single configuration, which is identified by one configuration ID.\n6. Deploy a single backend that serves both versions of the API by using the\n configuration ID returned from the previous step. For details, see\n [Deploying the API backend](/endpoints/docs/openapi/deploy-api-backend).\n\nWhat's next\n-----------\n\n- [API lifecycle management](/endpoints/docs/openapi/lifecycle-management)\n- [Planning your Google Cloud projects](/endpoints/docs/openapi/planning-cloud-projects)"]]
