AWS Lambda snapshot

aws_lambda_snapshot.js

// createSnapshots - Create snapshots from a list of volumes
// Include the AWS SDK and set the region
var AWS = require('aws-sdk');
AWS.config.region = 'us-east-1';

// New EC2 object
var ec2 = new AWS.EC2();

// Build a YYYYMMDD formatted current date string
var now = new Date();
var year = now.getFullYear();
var month = now.getMonth() + 1;
month = (month < 10 ? "0" : "") + month;
var day = now.getDate();
day = (day < 10 ? "0" : "") + day;
now = year + month + day;

// List of volumes stored in an array of strings
var volumes = ['vol-ebde6bf0',
    'vol-11454908',
    'vol-7525b939',
    'vol-6e26c322',
    'vol-64b5b529',
    'vol-4d2c3400'
];

// Epmty array to hod the new snapshot IDs
var snapshots = [];

var i = 0;
exports.createSnapshots = function(event, context) {
    for (index = 0; index < volumes.length; ++index) {
        var params = {
            VolumeId: volumes[index],
            Description: now + " daily Snapshot for " + volumes[index],
            DryRun: false
        };

        ec2.createSnapshot(params, function(err, data) {
            if (err) console.log(err, err.stack); // an error occurred
            else { // successful response
                console.log("Created snapshot request for %s", data.VolumeId);
                console.log(data);
                snapshots.push(data.SnapshotId);
                if (i == (volumes.length - 1)) {
                    for (numsnaps = 0; numsnaps < snapshots.length; ++numsnaps) {
                        console.log("Snapshot %s pending", snapshots[numsnaps]);
                    }
                    context.done();
                } else ++i;
            }
        });
    }
};