1
00:00:00,220 --> 00:00:02,660
‫Okay so let's have a look under the hood

2
00:00:02,660 --> 00:00:04,940
‫at how Elastic Beanstalk works.

3
00:00:04,940 --> 00:00:07,556
‫So under the hood, Beanstalk relies on something

4
00:00:07,556 --> 00:00:10,310
‫called CloudFormation, and we'll see CloudFormation

5
00:00:10,310 --> 00:00:12,381
‫in this course later on, but as a sneak peak,

6
00:00:12,381 --> 00:00:16,004
‫CloudFormation is used to provision other AWS services

7
00:00:16,004 --> 00:00:19,170
‫so we have our infrastructure as code.

8
00:00:19,170 --> 00:00:21,769
‫So Elastic Beanstalk is using CloudFormation

9
00:00:21,769 --> 00:00:25,250
‫as it's basis to do a lot of it's operations.

10
00:00:25,250 --> 00:00:27,180
‫So why would I tell you this?

11
00:00:27,180 --> 00:00:29,930
‫Well the use case is that using the CloudFormation resources

12
00:00:29,930 --> 00:00:33,110
‫in your .ebextensions folder that we just saw before,

13
00:00:33,110 --> 00:00:34,970
‫you can provision anything you want.

14
00:00:34,970 --> 00:00:37,880
‫So you can provision an ElastiCache, an S3 bucket,

15
00:00:37,880 --> 00:00:40,600
‫an DynamoDB table, whatever you want and that you'll

16
00:00:40,600 --> 00:00:41,830
‫see in this course.

17
00:00:41,830 --> 00:00:44,230
‫So the beautiful thing is that Elastic Beanstalk,

18
00:00:44,230 --> 00:00:46,330
‫even though the UI only allows you to configurate

19
00:00:46,330 --> 00:00:50,343
‫a few things, with EB extensions and CloudFormation,

20
00:00:50,343 --> 00:00:53,943
‫you can configure anything you want in your AWS.

21
00:00:53,943 --> 00:00:56,960
‫So let's have a sneak peek into it to see how

22
00:00:56,960 --> 00:01:00,380
‫CloudFormation was used during this session.

23
00:01:00,380 --> 00:01:02,140
‫So I'm here in Beanstalk and we have

24
00:01:02,140 --> 00:01:04,528
‫our application with two environments.

25
00:01:04,528 --> 00:01:08,490
‫So now I'm going to go to CloudFormation and show you

26
00:01:08,490 --> 00:01:10,320
‫what happens behind the scene.

27
00:01:10,320 --> 00:01:13,690
‫So in CloudFormation I can see I have two stacks,

28
00:01:13,690 --> 00:01:14,980
‫don't worry about this one,

29
00:01:14,980 --> 00:01:19,240
‫I have two stacks called eb-e stack and eb-e stacks

30
00:01:19,240 --> 00:01:20,630
‫and so they are different.

31
00:01:20,630 --> 00:01:23,910
‫So the first stack is actually, we can have a look here,

32
00:01:23,910 --> 00:01:26,490
‫for -en and this one is for -prod.

33
00:01:26,490 --> 00:01:29,230
‫So let's make it very simple let's look at the -en one.

34
00:01:29,230 --> 00:01:32,190
‫So if I click on the stack, it corresponds to a

35
00:01:32,190 --> 00:01:34,490
‫CloudFormation template and you can have a look

36
00:01:34,490 --> 00:01:36,430
‫by clicking on template and this would show you

37
00:01:36,430 --> 00:01:37,610
‫the entire template.

38
00:01:37,610 --> 00:01:39,110
‫Now you don't need to know how to read this right now,

39
00:01:39,110 --> 00:01:41,670
‫don't worry we'll learn about it later in this course.

40
00:01:41,670 --> 00:01:44,203
‫But the cool thing is that if you go to resources

41
00:01:44,203 --> 00:01:46,631
‫it shows you everything this CloudFormation stack

42
00:01:46,631 --> 00:01:48,460
‫has created for us.

43
00:01:48,460 --> 00:01:51,870
‫So as we can see, it has created an autoscaling group,

44
00:01:51,870 --> 00:01:54,820
‫an autoscaling group launch configuration,

45
00:01:54,820 --> 00:01:58,130
‫there was a Elastic IP, so EIP.

46
00:01:58,130 --> 00:02:01,393
‫There was as well as EC2 security group,

47
00:02:01,393 --> 00:02:03,810
‫and there was wait conditions

48
00:02:03,810 --> 00:02:05,520
‫that we can simply ignore for now.

49
00:02:05,520 --> 00:02:08,140
‫And then if I go to the other stack, so the -prod stack,

50
00:02:08,140 --> 00:02:10,200
‫this time they created 16 resources.

51
00:02:10,200 --> 00:02:11,910
‫So we have an autoscaling group,

52
00:02:11,910 --> 00:02:15,830
‫a launch configuration, a scaling policy, right here,

53
00:02:15,830 --> 00:02:18,560
‫another scaling policy, we can simply ignore this.

54
00:02:18,560 --> 00:02:21,000
‫So CloudFormation, a CloudWatch alarms, another

55
00:02:21,000 --> 00:02:24,083
‫CloudWatch alarm, this is used for the scaling policies.

56
00:02:24,083 --> 00:02:27,866
‫And then EC2 security group, another security group.

57
00:02:27,866 --> 00:02:31,640
‫And finally and elastic load balancer

58
00:02:31,640 --> 00:02:34,700
‫alongside listener rules and a target group.

59
00:02:34,700 --> 00:02:36,648
‫So CloudFormation was used behind the scenes

60
00:02:36,648 --> 00:02:38,930
‫to provision our Elastic Beanstalks.

61
00:02:38,930 --> 00:02:40,700
‫Now we don't need to touch anything in CloudFormation,

62
00:02:40,700 --> 00:02:43,340
‫but just so you know using CloudFormation you could deploy

63
00:02:43,340 --> 00:02:46,800
‫Elasticache, or DynamoDB, or S3 buckets.

64
00:02:46,800 --> 00:02:51,000
‫And so that would allow us to expand our Elastic Beanstalk

65
00:02:51,000 --> 00:02:53,510
‫applications to include anything we wanted.

66
00:02:53,510 --> 00:02:56,210
‫That's it for this Halil review, I hoped you liked it,