无法在 Visual Studio Code 中调试无服务器应用程序 [英] Can't debug serverless app in Visual Studio Code

问题描述

我正在尝试了解如何使用 Visual Studio Code 调试器来调试无服务器 lambda 函数.出于测试目的，我有非常简单的 test lambda 函数:

I'm trying to find out how can I use Visual Studio Code debugger to debug serverless lambda function. For testing purposes I have very simple test lambda function:

module.exports.handler = async (event) => {
  debugger;
  console.log(111, event);
};

然后，在 launch.json 中我创建了这样一个配置:

Then, in launch.json I created such a configuration:

{
    "version": "0.2.0",
    "configurations": [
        {
            "type": "node",
            "request": "launch",
            "name": "Launch via NPM",
            "runtimeVersion": "8.4.0",
            "runtimeExecutable": "node",
            "program": "${workspaceFolder}/node_modules/.bin/sls",
            "cwd": "${workspaceRoot}",
            "args": [
                "invoke",
                "local",
                "--function",
                "test",
                "--data",
                "{foo:'bar'}"
            ],
            "port": 9229
        }
    ]
 }

现在，我在我的 lambda 函数中放置一个断点并按 F5 启动调试器.我期待然后进入代码，放一些手表并逐步执行我的代码.但什么也没有发生.没有错误.没有控制台输出，没有代码在断点处暂停.没有什么.我得到的只是调试控制台中的消息:/home/set/.nvm/versions/node/v8.4.0/bin/node node_modules/.bin/sls invoke local --function test--data {foo:'bar'}

Now, I'm puting a breakpoint inside my lambda function and pressing F5 to start debugger. I'm expecting then to go in code, put some watches and walk my code step-by-step. But nothing happens. No errors. No console outputs, no code paused on breakpoints. Nothing. All I get is message in debug console: /home/set/.nvm/versions/node/v8.4.0/bin/node node_modules/.bin/sls invoke local --function test --data {foo:'bar'}

如果我进入终端并运行该行，我得到的正是预期的

If I go then in terminal and run that line I got exactly what is expected

set@set-home ~/www/blahblah/ens $ /home/set/.nvm/versions/node/v8.4.0/bin/node node_modules/.bin/sls invoke local --function test --data {foo:'bar'}
Serverless: INVOKING INVOKE
111 '{foo:bar}'

我做错了什么?如何在 Visual Studio Code 中调试无服务器应用程序?

What am I doing wrong? How can I debug serverless application in Visual Studio Code?

推荐答案

我怀疑你只需要去掉 "port": 9229 位.

I suspect you just need to get rid of the "port": 9229 bit.

我从未指定用于在本地调试 Serverless 功能的端口，但是将其添加到我的任何工作配置中会产生您观察到的症状.

I've never specified a port for debugging Serverless functions locally, but adding it to any of my working configurations produces the symptoms you observe.

顺便说一句，您也可以将其他一些东西取出来.作为参考，我的无服务器调试配置通常如下所示，用于在本地调用:

Incidentally, you might be able to take some of the other stuff out, as well. For reference, my Serverless debug configurations typically look like this for invoking locally:

    {
        "type": "node",
        "request": "launch",
        "name": "Debug sls local",
        "program": "${workspaceFolder}/node_modules/serverless/bin/serverless",
        "args": [
            "invoke", "local", "--function", "processFirehose", "--path", "sample-event.json",
            "--stage",
            "nonprod",
        ]
    },

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