vms_api.js

/**
 * Copyright 2017, Google, Inc.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

'use strict';

// [START complete]
// [START initialize]
var google = require('googleapis');
var compute = google.compute('v1');
// [END initialize]

// [START auth]
function auth (callback) {
  google.auth.getApplicationDefault(function (err, authClient) {
    if (err) {
      return callback(err);
    }

    // The createScopedRequired method returns true when running on GAE or a
    // local developer machine. In that case, the desired scopes must be passed
    // in manually. When the code is  running in GCE or GAE Flexible, the scopes
    // are pulled from the GCE metadata server.
    // See https://cloud.google.com/compute/docs/authentication for more
    // information.
    if (authClient.createScopedRequired && authClient.createScopedRequired()) {
      // Scopes can be specified either as an array or as a single,
      // space-delimited string.
      authClient = authClient.createScoped([
        'https://www.googleapis.com/auth/cloud-platform',
        'https://www.googleapis.com/auth/compute',
        'https://www.googleapis.com/auth/compute.readonly'
      ]);
    }
    callback(null, authClient);
  });
}
// [END auth]

// [START list]
/**
 * @param {Function} callback Callback function.
 */
function getVmsExample (callback) {
  auth(function (err, authClient) {
    if (err) {
      return callback(err);
    }
    // Retrieve the vms
    compute.instances.aggregatedList({
      auth: authClient,
      project: process.env.GCLOUD_PROJECT,
      // In this example we only want one VM per page
      maxResults: 1
    }, function (err, vms) {
      if (err) {
        return callback(err);
      }

      console.log('VMs:', vms);
      callback(null, vms);
    });
  });
}
// [END list]
// [END complete]

// Run the examples
exports.main = function (cb) {
  getVmsExample(cb);
};

if (module === require.main) {
  exports.main(console.log);
}