本地Azure Function部署至云端失败，报ServiceUnavailable错误求助

问题背景 #

本地编写并测试通过的Azure Function，在VSCode中执行「Azure Functions: Deploy to Azure」操作时，持续触发错误：(ServiceUnavailable) from host runtime，但该函数在本地终端运行完全正常。项目的tasks.json配置如下：

{
    "version": "2.0.0",
    "tasks": [
        {
            "label": "clean (functions)",
            "command": "dotnet",
            "args": [
                "clean",
                "/property:GenerateFullPaths=true",
                "/consoleloggerparameters:NoSummary"
            ],
            "type": "process",
            "problemMatcher": "$msCompile"
        },
        {
            "label": "build (functions)",
            "command": "dotnet",
            "args": [
                "build",
                "/property:GenerateFullPaths=true",
                "/consoleloggerparameters:NoSummary"
            ],
            "type": "process",
            "dependsOn": "clean (functions)",
            "group": {
                "kind": "build",
                "isDefault": true
            },
            "problemMatcher": "$msCompile"
        },
        {
            "label": "clean release (functions)",
            "command": "dotnet",
            "args": [
                "clean",
                "--configuration",
                "Release",
                "/property:GenerateFullPaths=true",
                "/consoleloggerparameters:NoSummary"
            ],
            "type": "process",
            "problemMatcher": "$msCompile"
        },
        {
            "label": "publish (functions)",
            "command": "dotnet",
            "args": [
                "publish",
                "--configuration",
                "Release",
                "/property:GenerateFullPaths=true",
                "/consoleloggerparameters:NoSummary"
            ],
            "type": "process",
            "dependsOn": "clean release (functions)",
            "problemMatcher": "$msCompile"
        },
        {
            "type": "func",
            "dependsOn": "build (functions)",
            "options": {
                "cwd": "${workspaceFolder}/bin/Debug/net9.0"
            },
            "command": "host start",
            "isBackground": true,
            "problemMatcher": "$func-dotnet-watch"
        }
    ]
}

排查与解决步骤 #

• 检查云端函数应用状态
  登录Azure门户，找到目标函数应用，查看概述页的运行状态。若状态异常，先尝试重启函数应用；若重启无效，检查是否存在CPU、内存等资源配额耗尽的情况。
• 匹配本地与云端运行时版本
  本地使用.NET 9.0，需确认云端函数应用的运行栈配置：在Azure门户的函数应用「配置」-「常规设置」中，将「运行时堆栈」设置为.NET 9，保存后重新部署。
• 手动打包部署验证
  在本地执行dotnet publish --configuration Release生成发布包，然后通过Azure门户的「部署中心」上传zip包，验证是否能成功部署，以此排除VSCode插件的问题。
• 查看云端日志定位细节
  在Azure门户的函数应用中打开「日志流」，重新触发部署操作，查看实时日志输出，获取更详细的错误信息（如依赖缺失、配置项错误等）。
• 更新VSCode Azure Functions插件
  检查VSCode中的Azure Functions插件版本，若不是最新版，更新后重新尝试部署，过时插件可能存在兼容性问题。

内容的提问来源于stack exchange，提问作者Adimirio