gistfile1.js

function test(){
  ec2.describeInstances(params, function(err, data) {
    if (err) console.log(err, err.stack); // an error occurred
    else     return data;           // successful response
  });
}


  app.get('/', function(req, res){
    var data = test()
    console.log(data);
    res.render('home', { data: data} );
  });

var server = app.listen(3000, function() {
  console.log('Listening on port %d', server.address().port);
});