CODEWITHSUNDEEP
node.jsamazon-ec2aws-sdk
another geek
another geek

Reputation: 361

Use AWS JS SDK in node to describe all ec2 instances

I've been using AWS JS SDK in node and I wanted to describe my existing ec2 istances in all the regions, but I get an empty reservation[]. I tried to specify a region using AWS.config.update{} and it worked as expected and it returned the instances, but this is what I want. I want to query AWS for all my instances, without specifying a region. Is there a simple way!? ( I'm using my smartphone to ask this question, I can't access my computer right now).

Thank you for your help.

Upvotes: 1

Views: 2737

Answers (2)

Neo
Neo

Reputation: 1392

According to Amazon Web Services docs,

For example, if you need to access Amazon EC2 objects in multiple regions, create an EC2 service object for each region and then set the region configuration of each service object accordingly.

var ec2_regionA = new AWS.EC2({region: 'ap-southeast-2', maxRetries: 15, apiVersion: '2014-10-01'});
var ec2_regionB = new AWS.EC2({region: 'us-east-1', maxRetries: 15, apiVersion: '2014-10-01'});

My implementation, 

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

var EC2Objects = [
    new AWS.EC2({apiVersion: '2016-11-15',region: 'us-east-1'}),      //N. Virginia
    new AWS.EC2({apiVersion: '2016-11-15',region: 'us-east-2'}),      //Ohio
    new AWS.EC2({apiVersion: '2016-11-15',region: 'us-west-1'}),      //N. California
    new AWS.EC2({apiVersion: '2016-11-15',region: 'us-west-2'}),      //Oregon
    new AWS.EC2({apiVersion: '2016-11-15',region: 'ca-central-1'}),   //Canada (Central)
    new AWS.EC2({apiVersion: '2016-11-15',region: 'eu-west-1'}),      //Ireland
    new AWS.EC2({apiVersion: '2016-11-15',region: 'eu-central-1'}),   //Frankfurt
    new AWS.EC2({apiVersion: '2016-11-15',region: 'eu-west-2'}),      //London
    new AWS.EC2({apiVersion: '2016-11-15',region: 'ap-northeast-1'}), //Tokyo
    new AWS.EC2({apiVersion: '2016-11-15',region: 'ap-northeast-2'}), //Seoul
    new AWS.EC2({apiVersion: '2016-11-15',region: 'ap-southeast-1'}), //Singapore
    new AWS.EC2({apiVersion: '2016-11-15',region: 'ap-southeast-2'}), //Syndney
    new AWS.EC2({apiVersion: '2016-11-15',region: 'ap-south-1'}),     //Mumbai
    new AWS.EC2({apiVersion: '2016-11-15',region: 'sa-east-1'})       //Sao Paulo
];

var instances = [];
listEc2();

function listEc2(){
    var params = {};
    for(var i=0; i<EC2Objects.length; i++){
        EC2Objects[i].describeInstances(params, function(err, data) {
            if (err) console.log(err, err.stack); // an error occurred
            else     ec2ListBuilderCallback(data);           // successful response
        });
    }
}

function ec2ListBuilderCallback(data){
    instances.push(data); 
    if(instances.length == EC2Objects.length){
        console.log(JSON.stringify(instances));
    }
}

OUTPUT:

[{"Reservations":[]},{"Reservations":[{"ReservationId":"r-0e7c0a2e3cf30944c","Groups":[],"Instances":[{"InstanceId":"i-0391f0e44b04675ad","ImageId":"ami-0b33d91d","State":{"Code":16,"Name":"running"}],{"Reservations":[]},{"Reservations":[]},{"Reservations":[]},{"Reservations":[]},{"Reservations":[]},{"Reservations":[]},{"Reservations":[]},{"Reservations":[]},{"Reservations":[]},{"Reservations":[]},{"Reservations":[]},{"Reservations":[]}]

I cut off the output for the region I am using because it was really long.

Upvotes: 3

Mark B
Mark B

Reputation: 200562

You have to loop through each region, and make the call once for each region. The API is region specific, you can't get the list of all EC2 instances in all regions in a single API call.

Upvotes: 1

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