Cannot connect to AWS EC2 using AWS-sdk

Question

I am using aws-sdk with node.js and I am not able to establish a connection to aws ec2 to obtain instance details using the sdk.

This is the error:

Error Error: connect ENETUNREACH 
at Object.exports._errnoException (util.js:1020:11)
at exports._exceptionWithHostPort (util.js:1043:20)
at TCPConnectWrap.afterConnect [as oncomplete] (net.js:1086:14)

And this is the piece of code I have written: I have removed the access keys for security purpose.

var express = require("express");
var mysql = require('mysql');
var connection = mysql.createConnection({
  host: 'localhost',
  user: '',
  password: '',
  database: ''
});

var app = express();
// Load the SDK for JavaScript
var AWS = require('aws-sdk');
// Set the region 
AWS.config.update({
  region: 'us-east-1'
});

var AWS_ACCESS_KEY_ID = '';
var AWS_SECRET_ACCESS_KEY = '';

var params = {
  DryRun: false
};

ec2 = new AWS.EC2({
  apiVersion: '2016-11-15'
});
ec2.describeInstances(params, function(err, data) {
  if (err) {
    console.log("Error", err.stack);
  } else {
    console.log("Success", JSON.stringify(data));
    res.send({
      message: data
    });
  }
});

app.listen(443);
console.log("The node server is running at port 443");

Is there a way to fix this? I am using aws-sdk for the first time. Thanks in advance.

Where are you passing the API keys?

Ele
– Ele

2018-02-12 19:14:46 +00:00
Commented Feb 12, 2018 at 19:14 — Ele
– Ele, Commented Feb 12, 2018 at 19:14

Ele · Accepted Answer · 2018-02-12 20:53:14Z

1

Probably you're not passing the API keys.

var AWS_ACCESS_KEY_ID = '';
var AWS_SECRET_ACCESS_KEY = '';

var params = {
  DryRun: false
};

ec2 = new AWS.EC2({
  accessKeyId: AWS_ACCESS_KEY_ID,
  secretAccessKey: AWS_SECRET_ACCESS_KEY,
  apiVersion: '2016-11-15'
});

Recommendation:

Put your API keys in separated locations.
If this code will be hosted within an EC2, use Service role permissions for EC2.
Use profiles.

edited Feb 12, 2018 at 20:53

answered Feb 12, 2018 at 19:24

Ele

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3 Comments

abhishek bv Over a year ago

I made those changes. But, no luck. I am getting a different error. .

Error MultipleValidationErrors: There were 2 validation errors:** * UnexpectedParameter: Unexpected key 'AWS_ACCESS_KEY_ID' found in params * UnexpectedParameter: Unexpected key 'AWS_SECRET_ACCESS_KEY' found in params     at ParamValidator.validate

Ele Over a year ago

@abhishekbv I think you didn't declare those variables. Further, can you test removing that MySQL connection?

abhishek bv Over a year ago

I am able to establish a connection now. Thank you very much. If I face any other issue I shall send you an email.

Samit · Accepted Answer · 2018-02-12 19:14:59Z

0

The credentials seems to be the issue here. Please double check the credentials you are providing for connecting to EC2. The best option would be to generate a new key_id and secret_access_key and use that. I would personally recommend to download the credentials file and pass that in your code rather than putting key_id and secret_access_key here.

answered Feb 12, 2018 at 19:14

Samit

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1 Comment

abhishek bv Over a year ago

I am using valid credentials. Also, to cross verify your suggestion. I generated new keys. Even then, I am getting the same error.

anilkay · Accepted Answer · 2018-02-12 20:38:54Z

0

Is Your Computer or Node.js connect to internet? You control this. first open cmd an use ping, if the ping return packet proper. Control internet of node.js. For control use requestify module for this. use this code:

const requi=require('requestify');
requi.get("https://google.com")
    .then(function(data){
        console.log(data);
    })
    .catch(function (err) {
       console.log(err);
    });

answered Feb 12, 2018 at 20:38

anilkay

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1 Comment

abhishek bv Over a year ago

I am able to interact with the outer world using my Node.js server. It is an issue with AWS keys.

MrDuk · Accepted Answer · 2018-02-12 21:53:37Z

0

The easiest way to ensure you're doing this properly is to follow the suggested credential management described in AWS SDK For NodeJs.

npm install aws-sdk

Create a credentials file at ~/.aws/credentials on Mac/Linux or C:\Users\USERNAME.aws\credentials on Windows

[default] 
aws_access_key_id = your_access_key   
aws_secret_access_key = your_secret_key

And then have the AWS object manage the credentials for you:

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

It looks like you might be almost there; instead of storing your keys in your code, store them in the specified credentials file above, and try again.

answered Feb 12, 2018 at 21:53

MrDuk

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3 Comments

abhishek bv Over a year ago

I am going to implement as you have suggested. This makes the code more readable.

GG2 Over a year ago

Is that a typo for the Windows location -- USERNAME.aws? USERNAME\.aws makes sense. It's testable, I suppose. My assumption that it's a typo sure isn't working yet; but it sure seems strange (and obnoxious) to create a folder beneath C:\Users not directly related to a Windows login.

GG2 Over a year ago

I forgot this page gives the directory in the way I'd expect: aws.amazon.com/developers/getting-started/nodejs

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