WEBVTT 00:00.600 --> 00:04.000 In this lab, we'll get introduced to deployments. 00:04.567 --> 00:05.567 Let us begin. 00:05.693 --> 00:09.053 The first question is, how many pods exist on the system? 00:09.413 --> 00:12.023 Let's run kubectl get pods command. 00:12.893 --> 00:14.573 We see there are no pods. 00:17.843 --> 00:21.983 The next one is to identify the number of replica sets. 00:23.393 --> 00:24.518 There are none. 00:24.833 --> 00:26.258 The answer is zero. 00:29.963 --> 00:35.423 Now, it's the number of deployments, so get deployments. 00:37.853 --> 00:39.353 That's zero as well. 00:41.423 --> 00:42.513 It's a clean environment. 00:42.593 --> 00:46.233 There are no pods, no replica sets, or deployments at the moment, 00:46.313 --> 00:48.243 but some changes have been made. 00:48.323 --> 00:52.283 We'll now check the deployments again. 00:53.723 --> 00:55.493 There is one deployment. 00:57.323 --> 00:59.011 Okay, so the answer is one. 01:03.413 --> 01:06.063 Now, how many replica sets exist on the system? 01:06.143 --> 01:08.706 Now, we know that there's one deployment, 01:09.353 --> 01:11.666 you do not know how many replica set. 01:12.293 --> 01:15.783 Let's just run the get Rs command again 01:15.863 --> 01:18.063 to check the number of replica sets. 01:18.143 --> 01:19.683 That's one replica set. 01:19.763 --> 01:22.853 Basically, the deployment called frontend deployment 01:23.326 --> 01:30.326 has now created a replica set named frontend deployment, dash, some numbers. 01:31.403 --> 01:36.203 That's the name of the replica set that the deployment has created. 01:36.743 --> 01:39.563 Then let's also check the number of pods now. 01:41.483 --> 01:42.963 There are four pods. 01:43.043 --> 01:44.613 Basically, that's what we're trying to understand here. 01:44.693 --> 01:47.373 There was nothing before, but when we created a deployment, 01:47.453 --> 01:52.223 it's created a replica set, and then it's also created four pods. 01:57.923 --> 02:01.193 Now, out of all the existing pods, how many are ready? 02:01.313 --> 02:06.483 If you look at the status here, out of four pods, zero already. 02:06.563 --> 02:07.913 Let's select zero. 02:12.143 --> 02:16.253 What is the image used to create the pods and the new deployment? 02:17.663 --> 02:22.073 Let's take a look at one of the pods in a bit more detail. 02:23.363 --> 02:24.863 Describe pod 02:27.113 --> 02:28.613 frontend deployment. 02:29.843 --> 02:32.873 Maybe we'll just pick one of the pod. 02:35.513 --> 02:39.483 We see the image used is BusyBox 888. 02:39.563 --> 02:40.913 Let's select that. 02:41.963 --> 02:44.133 Now, I know that there's a little bit of repetition 02:44.213 --> 02:46.403 between different exercises here, 02:46.583 --> 02:51.653 but this is mainly to get you familiar with some of these commands, 02:51.893 --> 02:54.423 the get commands and the describe commands. 02:54.503 --> 02:59.453 I promise that we have more fun stuff coming up in the upcoming labs. 03:00.173 --> 03:01.861 We're just getting started. 03:02.903 --> 03:05.283 Why do you think the deployment is not ready? 03:05.363 --> 03:07.043 As before, we know that 03:07.467 --> 03:11.367 it's because the image BusyBox 888 does not exist. 03:11.609 --> 03:12.959 Let's select that. 03:16.493 --> 03:19.653 The next task is to create a new deployment 03:19.733 --> 03:22.673 using the deployment definition, one file in root. 03:23.843 --> 03:25.493 We're already in root. 03:27.293 --> 03:28.943 Let's check this file. 03:29.273 --> 03:32.993 Let's try to create the deployment using the file. 03:36.983 --> 03:37.983 It didn't go. 03:38.663 --> 03:41.423 It didn't go through, so there is some error. 03:41.813 --> 03:46.763 It says, "No kind deployment is registered for version apps/v1." 03:47.393 --> 03:49.073 If we look at the file, 03:53.603 --> 03:56.287 we see that the API version is app/v1, 03:56.367 --> 03:59.523 which seems to be correct, but the kind is deployment, 03:59.603 --> 04:03.323 which is also right, but the issue is that it's case sensitive. 04:03.653 --> 04:08.993 The first character has to be a capital letter. 04:09.293 --> 04:11.573 That's the standard for kind. 04:12.983 --> 04:17.613 The reason we have these exercises is just to help you understand 04:17.693 --> 04:24.623 and learn how to know what the issue is when you come across these errors. 04:25.373 --> 04:28.893 Oftentimes, you'll face these errors because of these typos 04:28.973 --> 04:34.853 or words not being spelled correctly or not in the right case. 04:35.153 --> 04:39.473 You should know what those mean when you see these errors. 04:40.433 --> 04:44.453 There are possibilities that you may mix up the API version or kind. 04:45.113 --> 04:47.463 We don't want to spend a lot of time 04:47.543 --> 04:52.983 during the exam just not knowing what those are. 04:53.063 --> 04:56.453 That's the reason for these exercises. 04:57.000 --> 04:58.575 I've just fixed that. 04:59.873 --> 05:02.513 Let's proceed with the creation. 05:05.400 --> 05:06.750 That went through. 05:08.513 --> 05:13.193 The final task is to create a new deployment with the below attributes. 05:13.373 --> 05:16.983 We have the name, we have the replicas, and we have the image. 05:17.063 --> 05:21.143 To create an object, we know we could run the kubectl create command. 05:21.773 --> 05:24.063 This time we want to create a deployment. 05:24.143 --> 05:27.323 Let's take a look at the help for that. 05:27.833 --> 05:29.163 We see there are different options. 05:29.243 --> 05:33.203 You can create a deployment, specify a name with an image. 05:33.833 --> 05:35.163 We have a name and we have an image. 05:35.243 --> 05:37.713 We also want to specify the number of replicas. 05:37.793 --> 05:40.223 There is a command just for that. 05:40.913 --> 05:43.233 We have the name, the image, and the replicas. 05:43.313 --> 05:45.213 That's what we're going to follow. 05:45.293 --> 05:49.100 Run the kubectl create deployment command 05:50.333 --> 05:55.193 and specify the name, which is httpd-frontend. 06:06.233 --> 06:08.723 The image is-- 06:13.613 --> 06:16.153 It's good to create a practice of just copying and pasting 06:16.233 --> 06:19.383 from the question as that will also help you with 06:19.463 --> 06:26.303 the exam if you're learning this for the purpose of giving the exam. 06:26.903 --> 06:28.966 The replicas is the number three. 06:32.483 --> 06:37.373 Also make it a practice, always verify if what you did is right. 06:37.633 --> 06:39.058 Kubectl get deploy. 06:40.253 --> 06:42.953 We have the httpd frontend deployment. 06:43.193 --> 06:44.873 We also want to make sure 06:49.313 --> 06:51.188 that it goes to a ready state. 06:54.863 --> 06:56.753 Three out of three already. 06:59.603 --> 07:00.653 Check my work. 07:01.823 --> 07:02.587 Okay. 07:02.667 --> 07:03.667 That's done. 07:04.313 --> 07:06.023 That's the end of this lab.