describeInstances

'use strict';
console.log('Loading function');

let AWS = require('aws-sdk'); 
let ec2 = new AWS.EC2();

function describeEC2(){
    var params = {
        Filters: [
            {
                Name: 'availability-zone',
                Values: [
                    'ap-northeast-1a',
                ]
            },
        ]
    };

    ec2.describeInstances().promise().then(function(data) {
    // 成功
        console.log('InstanceId:', data.Reservations[0].Instances[0].InstanceId);
        return data;
    }).catch(function (error) {
        // 失敗
        console.log(error);
    });
}

exports.handler = (event, context, callback) => {
    console.log('[START]lambda function');
    var data = describeEC2();
    console.log('InstanceId2:', data.Reservations[0].Instances[0].InstanceId);
};