1 00:00:02,290 --> 00:00:04,910 Now when you have a look at this big picture 2 00:00:04,910 --> 00:00:08,100 at this Kubernetes architecture 3 00:00:08,100 --> 00:00:09,570 which you in the end will set up 4 00:00:09,570 --> 00:00:12,320 and with which Kubernetes will help you, 5 00:00:12,320 --> 00:00:16,380 there is an important differentiation to make. 6 00:00:16,380 --> 00:00:20,250 There are certain things Kubernetes will do for you, 7 00:00:20,250 --> 00:00:24,430 but there also are aspects and things you need to do 8 00:00:24,430 --> 00:00:28,130 in advance in order to then use Kubernetes. 9 00:00:28,130 --> 00:00:31,090 So you need to provide a certain environment 10 00:00:31,090 --> 00:00:33,250 in which Kubernetes is able to run. 11 00:00:33,250 --> 00:00:36,980 And the very important thing you as the developer 12 00:00:36,980 --> 00:00:39,490 or as the administrator have to do, 13 00:00:39,490 --> 00:00:43,270 is you have to create and set up the cluster 14 00:00:43,270 --> 00:00:45,840 and the worker nodes and the master node 15 00:00:45,840 --> 00:00:50,440 on which Kubernetes is then installed and does its thing. 16 00:00:50,440 --> 00:00:52,190 You have to do that. 17 00:00:52,190 --> 00:00:55,830 You have to install all the Kubernetes software 18 00:00:55,830 --> 00:00:57,140 on these nodes. 19 00:00:57,140 --> 00:01:01,050 So on these machines which are part of your cluster. 20 00:01:01,050 --> 00:01:04,970 And you have to configure all these things Kubernetes needs. 21 00:01:04,970 --> 00:01:07,820 Depending on the cloud provider you might be using, 22 00:01:07,820 --> 00:01:11,180 you also might need to set up extra resources 23 00:01:11,180 --> 00:01:14,160 your Kubernetes cluster might need eventually. 24 00:01:14,160 --> 00:01:18,780 Like a load balancer or certain filesystems services. 25 00:01:18,780 --> 00:01:20,250 And we're going to have a look at that 26 00:01:20,250 --> 00:01:22,240 throughout the next sections, of course. 27 00:01:22,240 --> 00:01:24,050 I will show you how to set up 28 00:01:24,050 --> 00:01:27,730 both a local testing environment on your local machine, 29 00:01:27,730 --> 00:01:29,120 as well as to set up 30 00:01:29,120 --> 00:01:32,880 the required resources on AWS as an example. 31 00:01:32,880 --> 00:01:34,320 You just have to be aware 32 00:01:34,320 --> 00:01:38,690 of the fact that you need to prepare the cluster. 33 00:01:38,690 --> 00:01:41,670 But even though this might sound very challenging right now, 34 00:01:41,670 --> 00:01:43,720 you will learn throughout this course 35 00:01:43,720 --> 00:01:45,720 that it's actually quite easy. 36 00:01:45,720 --> 00:01:48,430 Because both for local development 37 00:01:48,430 --> 00:01:51,950 as well as with AWS as an example, 38 00:01:51,950 --> 00:01:54,260 you get certain tools and services 39 00:01:54,260 --> 00:01:57,300 which make creating that cluster very important. 40 00:01:57,300 --> 00:02:00,410 It is important to understand though that Kubernetes 41 00:02:00,410 --> 00:02:03,043 will not set up these resources. 42 00:02:04,040 --> 00:02:07,650 Instead Kubernetes will use these resources. 43 00:02:07,650 --> 00:02:09,730 Once it is installed and set up, 44 00:02:09,730 --> 00:02:12,510 Kubernetes will manage these pods. 45 00:02:12,510 --> 00:02:16,820 So these things, these units, which contain your containers. 46 00:02:16,820 --> 00:02:20,130 It will create them, automatically distribute them 47 00:02:20,130 --> 00:02:23,070 to take advantage of the available resources. 48 00:02:23,070 --> 00:02:26,200 It will monitor and restart them if they fail. 49 00:02:26,200 --> 00:02:28,690 It will manage the running deployment. 50 00:02:28,690 --> 00:02:32,100 It will ensure that it runs smoothly and that it stays up 51 00:02:32,100 --> 00:02:34,880 and running, and it will manage all of that for you. 52 00:02:34,880 --> 00:02:37,410 It will start the containers for you. 53 00:02:37,410 --> 00:02:40,271 As I said earlier it's like Docker Compose, 54 00:02:40,271 --> 00:02:43,760 just for deploying your containers. 55 00:02:43,760 --> 00:02:47,030 Where Docker Compose kind of struggles with that, 56 00:02:47,030 --> 00:02:49,890 Kubernetes is really geared towards that. 57 00:02:49,890 --> 00:02:52,120 And therefore it will do all of that. 58 00:02:52,120 --> 00:02:54,210 But just as Docker Compose 59 00:02:54,210 --> 00:02:56,760 doesn't configure your local computer. 60 00:02:56,760 --> 00:02:58,850 It doesn't install Docker there. 61 00:02:58,850 --> 00:03:02,050 It doesn't set up your local computer at all. 62 00:03:02,050 --> 00:03:05,630 It just uses your local computer to then start containers 63 00:03:05,630 --> 00:03:08,630 just as Docker compose does that locally. 64 00:03:08,630 --> 00:03:10,892 Kubernetes also needs a certain environment 65 00:03:10,892 --> 00:03:13,870 to do that on remote machines. 66 00:03:13,870 --> 00:03:16,500 So that's an important differentiation to make. 67 00:03:16,500 --> 00:03:18,020 And I will show you both; 68 00:03:18,020 --> 00:03:20,420 how to set up a deployment with Kubernetes 69 00:03:20,420 --> 00:03:23,250 and how to configure it so that it does manage 70 00:03:23,250 --> 00:03:27,050 your containers for you, and how to set up a cluster. 71 00:03:27,050 --> 00:03:28,620 I just want you to be aware 72 00:03:28,620 --> 00:03:32,020 of the fact that this big picture which I'm showing you 73 00:03:32,020 --> 00:03:35,160 requires some work from your side as well. 74 00:03:35,160 --> 00:03:37,980 That Kubernetes will not create that cluster. 75 00:03:37,980 --> 00:03:39,900 It will just use it. 76 00:03:39,900 --> 00:03:41,570 But with that, let's dig deeper 77 00:03:41,570 --> 00:03:44,020 into the worker and monster notes to take a 78 00:03:44,020 --> 00:03:47,663 closer look at what exactly Kubernetes will do in there.