[[["易于理解","easyToUnderstand","thumb-up"],["解决了我的问题","solvedMyProblem","thumb-up"],["其他","otherUp","thumb-up"]],[["很难理解","hardToUnderstand","thumb-down"],["信息或示例代码不正确","incorrectInformationOrSampleCode","thumb-down"],["没有我需要的信息/示例","missingTheInformationSamplesINeed","thumb-down"],["翻译问题","translationIssue","thumb-down"],["其他","otherDown","thumb-down"]],["最后更新时间 (UTC)：2025-08-20。"],[[["\u003cp\u003eApp Engine's standard environment historically offered proprietary services bundled with first-generation runtimes like Python 2, Java 8, Go 1.11, and PHP 5.5.\u003c/p\u003e\n"],["\u003cp\u003eGoogle Cloud acknowledges the challenges of migrating from legacy runtimes and now supports legacy bundled services and their APIs on second-generation runtimes, including Python 3, Java 11+, Go 1.12+, and PHP 7+.\u003c/p\u003e\n"],["\u003cp\u003eFor runtime migration, developers can either use App Engine's legacy bundled service APIs on newer runtimes, or utilize similar Google Cloud products.\u003c/p\u003e\n"],["\u003cp\u003eFor legacy services not offered as separate Google Cloud products, such as image processing, developers can explore third-party providers or other solutions.\u003c/p\u003e\n"]]],[],null,["# Overview of legacy bundled services\n\n\u003cbr /\u003e\n\n\u003cbr /\u003e\n\n\nHistorically, the App Engine standard environment provided several scalable, proprietary services\nfor app development. These services were bundled with\n[first-generation runtimes](/appengine/docs/standard/runtimes)\n(also called\nApp Engine *legacy runtimes* ), which include\n[Python 2](/appengine/docs/legacy/standard/python/runtime),\n[Java 8](/appengine/docs/legacy/standard/java/runtime),\n[Go 1.11](/appengine/docs/legacy/standard/go111/runtime), and\n[PHP 5.5](/appengine/docs/legacy/standard/php/runtime). Because several\nof the legacy runtimes are no longer maintained by their respective\nopen-source communities, as an App Engine developer, you may face hard choices\non whether to invest time and effort in migrating to a newer runtime or else\nincur growing costs to retain your app on a legacy runtime.\n\n\u003cbr /\u003e\n\nRecognizing this challenge, Google Cloud is committed to providing you with a\nmore incremental migration path to newer runtimes. To reduce runtime migration\ncomplexity, Google Cloud now supports a set of App Engine legacy bundled services and\ntheir associated APIs on second-generation runtimes, which include\n[Python 3](/appengine/docs/standard/python3/runtime),\n[Java 11+](/appengine/docs/standard/java-gen2/runtime),\n[Go 1.12+](/appengine/docs/standard/go/runtime), and\n[PHP 7+](/appengine/docs/standard/php-gen2/runtime). Your app\ncan call legacy bundled services APIs for second-generation runtimes through\nlanguage-idiomatic libraries.\n**Figure 1.** How apps access the App Engine legacy bundled services\n\nIn runtime migration scenarios, you often also have the option to use\nGoogle Cloud products that offer similar functionality as the\nlegacy bundled services. For the legacy bundled services that are not available as\nseparate products in Google Cloud, such as image processing, search, and\nmessaging, you can use third-party providers or other workarounds as suggested\nin the Runtimes guide.\n\nTo learn more about these options for migrating your app, see\n[Migrate off of legacy bundled services](/appengine/migration-center/standard/services/migrating-services)."]]
