// AWS SDK object instance
var AWS = require('aws-sdk');

// The names of the EC2 instances that we wish to stop.
// Servers need to have a "Tag" with the name of "Name" and the value is as
// included in the list below.
var instanceNames = ['YourServerName1', 'YourServerName2', 'YourServerName3'];


// node.js event handler declaration
exports.handler = function(event, context) {
    // AWS EC2 object instance
    var ec2 = new AWS.EC2({region: 'eu-west-1'});
    var instanceIds = { InstanceIds: []};
    var params = {
      Filters: [
        {
          Name: 'tag:Name',
          Values: instanceNames
        }
      ]
    };

    ec2.describeInstances(params, function (err, data) {
        if (err) return console.error(err.message);
        var result = data;
        for(var i = 0; i < result.Reservations.length; ++i) {
            for(var j = 0; j < result.Reservations[i].Instances.length; ++j) {
                instanceIds.InstanceIds.push(result.Reservations[i].Instances[j].InstanceId);
            }
        }
        console.log(JSON.stringify(instanceIds));
        
        // call AWS API to start list of instances
        ec2.startInstances(instanceIds, function (err, data) {
            if (err) {
                // log failed with stack trace
                console.log(err, err.stack); 
            } else {
                // successful response
                console.log(JSON.stringify(data)); 
            }
     
            // report back
            context.done(err,data);
        });
    });
};

// AWS SDK object instance
var AWS = require('aws-sdk');

// The names of the EC2 instances that we wish to stop.
// Servers need to have a "Tag" with the name of "Name" and the value is as
// included in the list below.
var instanceNames = ['YourServerName1', 'YourServerName2', 'YourServerName3'];

// node.js event handler declaration
exports.handler = function(event, context) {
    // AWS EC2 object instance
    var ec2 = new AWS.EC2({region: 'eu-west-1'});
    var instanceIds = { InstanceIds: []};
    var params = {
      Filters: [
        {
          Name: 'tag:Name',
          Values: instanceNames
        }
      ]
    };

    ec2.describeInstances(params, function (err, data) {
        if (err) return console.error(err.message);
        var result = data;
        for(var i = 0; i < result.Reservations.length; ++i) {
            for(var j = 0; j < result.Reservations[i].Instances.length; ++j) {
                instanceIds.InstanceIds.push(result.Reservations[i].Instances[j].InstanceId);
            }
        }
        console.log(JSON.stringify(instanceIds));
        
        // call AWS API to stop list of instances
        ec2.stopInstances(instanceIds, function (err, data) {
            if (err) {
                // log failed with stack trace
                console.log(err, err.stack); 
            } else {
                // successful response
                console.log(JSON.stringify(data)); 
            }
     
            // report back
            context.done(err,data);
        });
    });
};