How to call Azure Client from Node via https request? - node.js

Question

I have VM up and running in Azure. I wanted to call Azure VM from Node. I am totally unware about the get API for Azure. So how can this be achieved?
I have tenantID, ClientID, Client Secret and subscription id.
Also is there any thing unique I can get from running VM which will be same if I create another VM on Azure?

Answer 1

Try this considering you have the values in to access vault in environment variable to get secrets from azure vault:
var _ = require('lodash'),
msRestAzure = require('ms-rest-azure'),
KeyVault = require('azure-keyvault'),
AuthenticationContext = require('adal-node').AuthenticationContext,//Utility function to get key vault client
function getKeyVaultClient() {
// service principal details to access the vault
var clientId = process.env['CLIENT_ID']; // service principal
var domain = process.env['DOMAIN']; // tenant id
var secret = process.env['APPLICATION_SECRET'];
return new Promise(function (resolve, reject) {
msRestAzure.loginWithServicePrincipalSecret(clientId, secret, domain, function (err) {
if (err) {
return reject(err);
}
// authenticate with key vault with a service principal
var kvCredentials = new KeyVault.KeyVaultCredentials(authenticator);
keyVaultClient = new KeyVault.KeyVaultClient(kvCredentials);
return resolve(keyVaultClient);
});
})
}
function authenticator(challenge, callback) {
// service principal details to access the vault
var clientId = process.env['CLIENT_ID']; // service principal
var secret = process.env['APPLICATION_SECRET'];
// Create a new authentication context.
var context = new AuthenticationContext(challenge.authorization);
// Use the context to acquire an authentication token.
return context.acquireTokenWithClientCredentials(challenge.resource, clientId, secret, function (err, tokenResponse) {
if (err) {
return callback(err);
}
// Calculate the value to be set in the request's Authorization header and resume the call.
var authorizationValue = tokenResponse.tokenType + ' ' + tokenResponse.accessToken;
return callback(null, authorizationValue);
});
}
var vaultUri = 'https://' + process.env['VAULT_NAME'] + '.vault.azure.net/secrets/' + key;
getKeyVaultClient().then(function (vaultClient) {
vaultClient.getSecret(vaultUri,
function (err, result) {
if (err) {
return reject(err);
} else {
return resolve(result.value);
}
});
}).catch(function (err) {
reject(err);
})
You can have a look at the official documentation and examples on how to access keys and secrets using the Rest API's exposed by azure.