Azure 应用程序服务中的 Nodejs 应用程序始终返回 HTTP 错误 404

Question

I am trying to learn azure app services deploying a very basic nodejs "hello world" applicatio. I deploy successfully the app from Azure Devops server release pipeline, I can see the app in azure portal in started state but when I try to access it I get

This sieracnodejasdemo.azurewebsites.net page can't be found HTTP ERROR 404. whereas app is up and running

Here is the basic index.js

var http = require('http');
var server = http.createServer(function(request, res) {


    res.writeHead(200, { "Content-Type": "text/plain" });
    var url = request.url;

    if (url === '/about') {
        res.write(' Welcome to about us page');
        res.end();
    } else if (url === '/contact') {
        res.write(' Welcome to contact us page');
        res.end();
    } else {
        res.write('Hello World!');
        res.end();
    }
});


const port = process.env.PORT || 3000;
console.log(port);
server.listen(port);
console.log("Server running at http://%d", port);

It seems to me that it is a problem of PORT, so 1st question should I add a firewall rule for the port? I even replaced process.env.PORT by 80 but id did not help, always the same error. I tried to change the node version to ~10 or 18 in settings but did not help neither. So what am I missing to make it respond correctly? Knowing that when I run it on my local machine it works fine Thanks for your help

Answer 1

I have tried to repro the same in my environment and am able to deploy the nodeJS application successfully after following the below steps .

Step 1: Created a Sample nodeJS application in VS code and pushed it to Azure Repos.

Step 2: Create build steps as below.

Step 3: Run the pipeline and verify the artefact generated.

Step 4: Create an Azure App service with Runtime ' Node 18 LTS' and Operating system Linux

Step5: Create a Service connection in Azure DevOps

Step 6: Create a Release pipeline as below.

Step 7: Once deployment is completed, verify the app service.