start_bastion_server.js

var AWS = require('aws-sdk');
var ec2 = new AWS.EC2({apiVersion: '2015-10-26'});
exports.handler = function(event, context) {
  ec2.describeInstances({}, function(err, data) {
    if (err) {
      console.log(err, err.stack);
      context.done('error', err.stack);
      return;
    }
    var is_target = function(tags) {
      for (var n in tags) {
        if (tags[n].Key == 'Server' && tags[n].Value == 'bastion') {
          return true;
        }
      }
      return false;
    };
    var gips = [];
    var get_target = function(ids, instances) {
      for (var i = 0; i < instances.length; i++) {
        var ins = instances[i];
        if (is_target(ins.Tags)) {
          if (ins.State.Name === 'running') {
            console.log("running (instanceId: " + ins.InstanceId + "[" + ins.PublicIpAddress + "])");
            gips.push(ins.PublicIpAddress);
          } else {
            console.log("starting (instanceId: " + ins.InstanceId + "])");
            ids.push(ins.InstanceId);
          }
        }
      }
    };
    var ids = [];
    for (var i = 0; i < data.Reservations.length; i++) {
      get_target(ids, data.Reservations[i].Instances);
    }
    if (ids.length === 0) {
      context.done(null, {"ip": gips.join(','), "message": "no instance to start."});
      return;
    }
    ec2.startInstances({InstanceIds: ids}, function(err, data) {
      if (err) {
        console.log(err, err.stack);
        context.done('error', err.stack);
        return;
      }
      console.log(data);
      context.done(null, {"ip": gips.join(','), "message": "started instance(instanceId: " + ids.join(',') + ")"});
    });
  });
};