How to configure the region in the AWS js SDK?

Question

My problem

I am writing a simple js function that reads some information from AWS CloudWatch Logs.

Following the answer at Configuring region in Node.js AWS SDK, and the AWS nodejs SDK documentation, I came up with the following:

Code

var AWS = require('aws-sdk');

var cloudwatchlogs = new AWS.CloudWatchLogs();

console.log(AWS.config.region)              // Undefined

AWS.config.region = 'eu-central-1'          // Define the region with dot notation
console.log(AWS.config.region) .            // eu-central-1

AWS.config.update({region:'eu-central-1'}); // Another way to update
console.log(AWS.config.region) .            // eu-central-1


var params = {
  limit: 0,
//   logGroupNamePrefix: 'STRING_VALUE',
//   nextToken: 'STRING_VALUE'
};

// This call is failing
cloudwatchlogs.describeLogGroups(params, function(err, data) {
  if (err) console.log(err, err.stack); // an error occurred
  else     console.log(data);           // successful response
});

Output and error

undefined
eu-central-1
eu-central-1
{ ConfigError: Missing region in config
    at Request.VALIDATE_REGION (/Users/adam/binaris/adam-test-sls/node_modules/aws-sdk/lib/event_listeners.js:91:45)
    at Request.callListeners (/Users/adam/binaris/adam-test-sls/node_modules/aws-sdk/lib/sequential_executor.js:105:20)
    at callNextListener (/Users/adam/binaris/adam-test-sls/node_modules/aws-sdk/lib/sequential_executor.js:95:12)
    at /Users/adam/binaris/adam-test-sls/node_modules/aws-sdk/lib/event_listeners.js:85:9
    at finish (/Users/adam/binaris/adam-test-sls/node_modules/aws-sdk/lib/config.js:315:7)
    at /Users/adam/binaris/adam-test-sls/node_modules/aws-sdk/lib/config.js:333:9
    at SharedIniFileCredentials.get (/Users/adam/binaris/adam-test-sls/node_modules/aws-sdk/lib/credentials.js:126:7)
    at getAsyncCredentials (/Users/adam/binaris/adam-test-sls/node_modules/aws-sdk/lib/config.js:327:24)
    at Config.getCredentials (/Users/adam/binaris/adam-test-sls/node_modules/aws-sdk/lib/config.js:347:9)
    at Request.VALIDATE_CREDENTIALS (/Users/adam/binaris/adam-test-sls/node_modules/aws-sdk/lib/event_listeners.js:80:26)
  message: 'Missing region in config',
  code: 'ConfigError',
  time: 2017-07-11T09:57:55.638Z } ...

Environment

The code is running locally under node v8.1.2.

My question

How can I correctly configure the region in the AWS js SDK?

Addendum

Opened an issue on github and got some response.

Thiouracil

This problem persists across the SDK. SQS and Cloudsearch also require region and the SDK docs leave it out. – Sickly

See Also: Configuring region in Node.js AWS SDK – Mendelsohn

Answer 1

Or, alternatively, you can specify that when creating your cloudwatch object:

var AWS = require('aws-sdk');
var cloudwatchlogs = new AWS.CloudWatchLogs({region: 'eu-central-1'});

Presidio

Perfect. Worked like a charm. The AWS js documentation examples are misleading and counterproductive. – Thiouracil

Answer 2

Write code in following way it will work.

var AWS = require('aws-sdk');

// assign AWS credentials here in following way:
AWS.config.update({
  accessKeyId: 'asdjsadkskdskskdk',
  secretAccessKey: 'sdsadsissdiidicdsi',
  region: 'eu-central-1'
});
var cloudwatchlogs = new AWS.CloudWatchLogs({apiVersion: '2014-03-28'});

Poindexter

Answer 3

Use following.

AWS.config.update({region: 'eu-central-1'});

You can find more information in following link.

http://docs.aws.amazon.com/sdk-for-javascript/v2/developer-guide/setting-region.html

Roseleeroselia

Unfortunately, it does not work - I've tried it in my code. – Thiouracil

Strange. Getting the same output or different output? – Roseleeroselia

Same, because this line already appears in my code. See above. – Thiouracil