WEBVTT 00:06.040 --> 00:10.080 Hello and welcome to the Certified Kubernetes Administrators course. 00:10.090 --> 00:14.600 My name is Mumshad Mannambeth and I will be your instructor for this course. 00:14.650 --> 00:20.900 So about me, I am a Solutions Architect specializing on Cloud, Automation and DevOps Technologies. 00:21.120 --> 00:26.350 I have authored several Best Seller and Top Rated courses on technologies like Docker, 00:26.360 --> 00:32.840 Kubernetes and OpenShift as well as automation technologies like Ansible, Chef and Puppet. 00:32.860 --> 00:39.810 This course is the third installment in the series on Kubernetes and focuses on the Administrator Certification. 00:40.540 --> 00:43.230 Let's take a look at the structure of this course. 00:43.300 --> 00:49.320 We start with a series of lectures on various topics in Kubernetes, where we simplify complex concepts 00:49.500 --> 00:53.870 using illustration and animation and some fun analogies. 00:53.870 --> 00:58.390 We have optional quizzes that test your knowledge after each lecture. 00:58.390 --> 01:04.600 We have hundreds of practice questions that will help you practice what you learned on a real live environment 01:04.680 --> 01:05.800 right in your browser. 01:06.400 --> 01:08.890 Yes you don't need to have your own environment. 01:08.890 --> 01:14.800 We give you the required labs that are real and that can be accessed by you anywhere, anytime, 01:14.800 --> 01:19.540 And as many times as you want. The kubernetes certification is hands-on, 01:19.540 --> 01:25.030 So the practice test will give you enough experience and practice on getting ready for it. 01:25.030 --> 01:26.490 More on this coming soon. 01:27.830 --> 01:33.500 We also have a dedicated slack channel that you get exclusive access to where experts and other students 01:33.530 --> 01:38.810 gather to help you clear your doubts and get instant support on your queries. 01:38.810 --> 01:43.220 We will also discuss some tips and tricks throughout this course to help you crack the certification 01:43.220 --> 01:44.020 exam. 01:44.130 --> 01:50.180 And as always if you have any questions, you may reach out directly to us through our Q&A section or 01:50.230 --> 01:56.450 slack channel. Now, this is one of the course in the series on Kubernetes and focuses on getting 01:56.450 --> 02:02.420 the Kubernetes Administrators Certification. So having a basic understanding to some of the concepts 02:02.480 --> 02:08.900 and pre-requisites will help. Knowing basics of Docker, and some basics of kubernetes itself, such as 02:08.900 --> 02:15.620 pods, deployments and service and having a good understanding of the YAML language, setting up a basic 02:15.620 --> 02:19.880 lab environment using virtual box can all help in this journey. 02:19.880 --> 02:26.240 We do discuss setting up a kubernetes cluster in detail in this course and we also have online labs 02:26.240 --> 02:29.080 and practice tests for a lot of these concepts, 02:29.090 --> 02:35.720 but if you are an absolute beginner I highly recommend taking the Kubernetes for the Absolute Beginners 02:35.720 --> 02:42.420 course first which is a short quick introduction to some of the basic concepts. 02:42.530 --> 02:49.200 Let us now look at the Course Objectives. The objectives of this course are aligned to match the Certified Kubernetes 02:49.200 --> 02:51.870 administrators exam curriculum. 02:52.000 --> 02:57.770 We will discuss about details around the certification itself in one of the upcoming lectures before 02:57.770 --> 02:59.640 heading into any of these topics. 02:59.660 --> 03:04.980 However remember this is not just a course to clear the certification. 03:05.090 --> 03:11.090 We discussed a number of other related topics and the intent of this course is to get you to be good 03:11.180 --> 03:17.710 at installing configuring and troubleshooting kubernetes cluster. With the way the contents are organized 03:17.720 --> 03:21.880 In this course we do not start the course by building a cluster from scratch. 03:21.890 --> 03:26.600 We actually do it towards the end of the course in the Installation, Configuration and Validation 03:26.600 --> 03:27.510 section. 03:27.620 --> 03:33.020 You will be working on pre-built live clusters throughout the earlier sections in this course. 03:33.020 --> 03:35.080 And I think that makes sense. 03:35.090 --> 03:38.330 Think of this as learning to engineer and build a car. 03:38.330 --> 03:44.660 It would be much easier, if you have already driven a car, know how it works. If you know what the wheels are for, what 03:44.660 --> 03:48.820 the transmission is for, what the brakes are for and how to fill fuel etc. 03:48.890 --> 03:54.260 That way you would be able to relate those to the underlying concepts better when you learn them and 03:54.260 --> 03:59.960 that is why I think practicing on prebuilt clusters and learning the basic concepts first will help 03:59.960 --> 04:04.810 you understand how to build a cluster from scratch towards the end of this course. 04:04.940 --> 04:11.560 We start with the core concepts, where we look at the various components that form the Kubernetes architecture. 04:11.660 --> 04:15.460 We then discuss some of the API primitives. Here 04:15.560 --> 04:22.670 we mostly recap what we learned in the beginners course about PODs, ReplicaSets, Deployments, Namespaces 04:22.670 --> 04:23.960 etc.. 04:23.960 --> 04:29.120 We then look at services and other network primitives. In the next section. 04:29.120 --> 04:30.550 We look at scheduling. 04:30.590 --> 04:37.740 We start with Labels & Selectors, followed by daemon sets and how resource limits can affect pod placements. 04:37.760 --> 04:42.980 We look at ways of manually scheduling a pod and configuring multiple schedulers and how to view the 04:42.980 --> 04:46.460 scheduler events. In the logging and monitoring section 04:46.460 --> 04:52.580 we look at different ways of monitoring and logging the cluster of components as well as applications 04:52.580 --> 04:56.720 hosted on the cluster. In the Application Lifecycle Management section, 04:56.720 --> 05:02.540 We look at rolling updates and rollbacks and various ways of configuring applications, scaling applications 05:02.630 --> 05:08.930 and primitives necessary to create a self-healing application. In the cluster maintenance section, 05:08.930 --> 05:14.810 We look at the different options available to take down a node in the cluster for maintenance purposes. 05:14.810 --> 05:20.330 We then look at how software releases are organized in Kubernetes, followed by the cluster upgrade 05:20.330 --> 05:21.500 process. 05:21.500 --> 05:27.140 You will perform an upgrade to a live cluster yourself in the practice test without taking down the 05:27.140 --> 05:28.060 application. 05:28.080 --> 05:32.210 And finally we look at the different backup and restore methodologies. 05:32.210 --> 05:34.550 We then move to security. 05:34.610 --> 05:39.570 We start by looking at different ways of authenticating into the that as cluster. 05:39.590 --> 05:42.170 We take a good look at TLS certificates. 05:42.230 --> 05:48.110 We start all the way from the absolute basics of TLS certificates into how exactly a cluster can 05:48.110 --> 05:49.760 be secured with these. 05:49.850 --> 05:55.580 So there are many practice exercises around that. You will be asked to troubleshoot and fix issues related 05:55.580 --> 06:00.370 to certificates which I believe will give you confidence in working with certificates. 06:00.380 --> 06:03.170 We look at the new certificates API. 06:03.170 --> 06:08.680 We then look at role based access controls and attribute based access controls for authorization. 06:08.680 --> 06:13.160 We then look at network policies and security contacts in the networking section. 06:13.160 --> 06:16.930 We start with some optional networking prerequisite lectures. 06:16.940 --> 06:21.850 These will help you understand and troubleshoot networking in kubernetes is in-depth. 06:22.040 --> 06:28.850 So we start by understanding the basics of networking in Linux, basics of switching and routing and bridge 06:28.850 --> 06:30.500 networks in the Linux system. 06:30.500 --> 06:33.070 We try and understand the basics of DNS. 06:33.080 --> 06:39.290 What core DNS is. We then look at network name spaces and then relate those concepts to networking 06:39.290 --> 06:42.650 in Docker. We then start with networking in a kubernetes cluster, 06:42.680 --> 06:44.570 We look at CNI and what they are. 06:44.570 --> 06:48.460 We look at one of the CNI networks in depth and how it functions. 06:48.470 --> 06:53.810 We look at how service networking works under the hood. We then look at DNS and kubernetes cluster. 06:53.930 --> 06:56.030 And finally ingress networking. 06:56.180 --> 07:01.910 And of course this section is filled with practice exercises where you will practice viewing and gathering 07:01.970 --> 07:07.460 network information from a cluster, implementing network configurations and, troubleshooting network 07:07.460 --> 07:09.140 related issues in a cluster. 07:09.140 --> 07:14.750 We then look look at designing, installing, configuring and validating a kubernetes cluster from scratch. 07:14.840 --> 07:22.120 We understand how a High Availability cluster works, how an ETCD cluster works and the best practices 07:22.720 --> 07:25.140 in deploying an HA cluster. 07:25.920 --> 07:30.180 We look at two ways of bootstrapping the worker Node one the usual way and the other using the TLS 07:30.280 --> 07:31.970 bootstrap approach. 07:32.400 --> 07:38.160 We finally perform end-to-end tests on the cluster we deployed using the kubernetes testing infrastructure. 07:38.300 --> 07:39.130 With all of this 07:39.940 --> 07:44.170 you should have gained enough knowledge on how the various components work together in a kubernetes 07:44.220 --> 07:44.910 cluster. 07:45.250 --> 07:48.270 So troubleshooting piece should come to you naturally. 07:48.400 --> 07:55.980 We look at some techniques that can be followed while troubleshooting a cluster and applications running on them 07:56.120 --> 08:03.340 Again we have a number of practice tests where we give you a broken cluster and you troubleshoot and fix them 08:04.630 --> 08:08.960 Well that's a lot and we plan to add more relevant topics to this list going forward. 08:09.060 --> 08:15.900 Finally a word about practice tests. The kubernetes certification exam is a practical hands on exam 08:16.140 --> 08:22.620 so it is very important to practice what you learn which is why we have got a custom solution that will 08:22.630 --> 08:29.950 give you access to a real Kubernete environment right in your browser along with a quiz portal that 08:29.960 --> 08:35.660 provides fun and challenging problems for you to solve. You're required to gain a set of different skills 08:35.700 --> 08:41.650 working with kubernetes, such as how to look for information, how to troubleshoot issues. 08:41.850 --> 08:46.800 That is why we have questions where you will be asked to find information within an environment. 08:46.890 --> 08:52.560 You will also be asked to perform configuration tasks where you will be required to configure and deploy 08:52.620 --> 08:55.650 applications and services on the cluster. 08:55.660 --> 08:58.940 We will test your work and provide feedback instantly. 08:59.140 --> 09:03.900 We will occasionally make changes to the environment or break stuff and ask you to troubleshoot and 09:04.100 --> 09:05.100 fix them. 09:05.110 --> 09:10.830 These are common issues that one would face while working with kubernetes and these exercises will 09:10.840 --> 09:14.240 help you troubleshoot and fix issues quickly. 09:14.340 --> 09:18.930 When you see an error message you should be able to understand what that means and where to look for 09:18.930 --> 09:22.540 information related to that error message and how to fix it. 09:22.560 --> 09:28.530 One of the major challenges in a practical test like the one in the kubernetes certification is time 09:28.860 --> 09:35.770 even simple issues like a typo or an indentation error in a YAML file can take a beginner hours to fix 09:35.780 --> 09:41.550 This is why we have hundreds of such exercises in this course that will make you an expert and give 09:41.560 --> 09:44.920 you enough practice to help you clear the exam. 09:45.090 --> 09:46.990 Well, that's all for now, 09:47.040 --> 09:50.620 Thank you for enrolling and I'll see you in class.