AWS Lambda function to identify ec2 instances without an owner tag

lambda-monkey

console.log('Loading function');

var AWS = require('aws-sdk');  
AWS.config.region = 'us-east-1';

exports.handler = function(event, context) {  
    console.log("\n\nLoading handler\n\n");
    var ec2 = new AWS.EC2();
    var with_owner = {};
    var without_owner = {};
    ec2.describeInstances({}, function(err, data) {
        if(err) {
            console.error(err.toString());
        } else { 
            for(var r=0,rlen=data.Reservations.length; r<rlen; r++) {
                var reservation = data.Reservations[r];
                for(var i=0,ilen=reservation.Instances.length; i<ilen; ++i) {
                    var instance = reservation.Instances[i];
 
                    var name = '';
                    for(var t=0,tlen=instance.Tags.length; t<tlen; ++t) {
                        if(instance.Tags[t].Key === 'Name') {
                            name = instance.Tags[t].Value;
                        }
                        if(instance.Tags[t].Key === 'owner') {
                            params = {};
                            params.Name = name;
                            params.State = instance.State.Name;
                            params.Owner = instance.Tags[t].Value;
                            var ID = instance.InstanceId;
                            with_owner[ID] = params;
                        } else {
                            params = {};
                            params.Name = name;
                            params.State = instance.State.Name;
                            var ID = instance.InstanceId;
                            without_owner[ID] = params;
                        }
                    }
                }
            }
        }
        console.log('WITH OWNER:')
        console.log(JSON.stringify(with_owner)+'\n\n')
        console.log('WITHOUT OWNER:')
        console.log(JSON.stringify(without_owner)+'\n\n')
        context.done(null, 'Function Finished!');  
    });
};