cloud-init for Azure Metadata service

azure-metadata-cloud-init.yml

#cloud-config
package_upgrade: true
packages:
  - nginx
  - nodejs
  - npm
write_files:
  - owner: www-data:www-data
    path: /etc/nginx/sites-available/default
    content: |
      server {
        listen 80;
        location / {
          proxy_pass http://localhost:3000;
          proxy_http_version 1.1;
          proxy_set_header Upgrade $http_upgrade;
          proxy_set_header Connection keep-alive;
          proxy_set_header Host $host;
          proxy_cache_bypass $http_upgrade;
        }
      }
  - owner: azureuser:azureuser
    path: /home/azureuser/myapp/index.js
    content: |
      var express = require('express')
      var app = express()
      var os = require('os');

      app.get('/', function (req, res) {
        const request = require('request');
        const options = {
          url: 'http://169.254.169.254/metadata/instance?api-version=2021-02-01',
          headers: {
            'Metadata': 'true'
          }
        };
        request(options, function (error, response, body) {
          if (!error && response.statusCode == 200) {
            var metadataObj = JSON.parse(body)
            let ejs = require('ejs'),
              html = ejs.render(
                '<h2><%= metadataObj.compute.name %></h2> \
                  <p>Name: <%= metadataObj.compute.name %></p> \
                  <p>Private IP Address: <%= metadataObj.network.interface[0].ipv4.ipAddress[0].privateIpAddress %></p> \
                  <p>Resource id: <%= metadataObj.compute.resourceId %></p> \
                  <p>Scale set name: <%= metadataObj.compute.vmScaleSetName %></p></p> \
                  <p><pre><%=  JSON.stringify(metadataObj, null, 2) %></pre></p>',
                  { metadataObj: metadataObj }
              )
            res.send(html)
          }
          else {
            console.log("Error " + response.statusCode)
          }
        })
      })
      app.get('/health', function (req, res) {
        res.send('PONG!')
      })
      app.listen(3000, function () {
        console.log('Hello world app listening on port 3000!')
      })
runcmd:
  - service nginx restart
  - cd "/home/azureuser/myapp"
  - npm init
  - npm install express -y
  - npm install nodemon -y
  - npm install ejs -y
  - nodejs index.js