1 00:00:00,670 --> 00:00:05,770 Hello and welcome to this lecture. In this lecture we talk about the different choices available 2 00:00:05,770 --> 00:00:11,440 for the infrastructure hosting a Kubernetes cluster. In the previous lecture we discussed about the various 3 00:00:11,440 --> 00:00:13,870 options we have in deploying a kubernetes cluster. 4 00:00:13,900 --> 00:00:17,140 Let's look at it in a bit more detail here. 5 00:00:17,170 --> 00:00:22,570 Kubernetes can be deployed on various systems in different ways. Starting with your laptops, to physical 6 00:00:22,570 --> 00:00:26,660 or virtual servers within an organization as well as those in the cloud. 7 00:00:26,860 --> 00:00:31,750 Depending on your requirements your cloud ecosystem and the kind of applications you wish to deploy 8 00:00:32,140 --> 00:00:36,070 you may choose one of these solutions. On a laptop or a local machine, 9 00:00:36,070 --> 00:00:38,130 There are a number of ways to get started. 10 00:00:38,140 --> 00:00:43,540 First of all on a supported Linux machine you can get started with installing the binaries manually 11 00:00:43,570 --> 00:00:45,550 and setting up a local cluster. 12 00:00:45,550 --> 00:00:48,890 However that is too tedious especially if you are just getting started. 13 00:00:49,300 --> 00:00:55,140 So relying on a solution that automates all that will help in setting up a cluster in a matter of minutes. 14 00:00:55,270 --> 00:00:58,810 We will look at some of those solutions in a bit. On Windows 15 00:00:58,810 --> 00:01:04,240 on the other hand, you cannot setup kubernetes natively as there are no windows binaries. 16 00:01:04,300 --> 00:01:10,780 You must rely on a virtualization software like Hyper-V or Vmware workstation or VirtualBox to create 17 00:01:10,810 --> 00:01:13,950 Linux VMs on which you can run kubernetes. 18 00:01:13,960 --> 00:01:19,570 There are also solutions available to run kubernetes components as docker containers on windows VMs. 19 00:01:19,900 --> 00:01:26,920 But remember, even then the docker images are Linux based and under the hoods they run on a small Linux OS 20 00:01:26,950 --> 00:01:31,500 created by Hyper-V for running Linux docker containers. 21 00:01:31,540 --> 00:01:36,040 So what are some of the solutions available to easily get started with kubernetes on a local machine? 22 00:01:36,450 --> 00:01:42,310 Minikube, deploys a single node cluster easily. It relies on one of the virtualization software like Oracle 23 00:01:42,310 --> 00:01:47,350 Virtualbox to create virtual machines that run the kubernetes cluster components. 24 00:01:47,380 --> 00:01:52,330 We have seen this in the beginners course. The kubeadm tool can be used to deploy a single node or a 25 00:01:52,330 --> 00:01:53,480 multi node cluster 26 00:01:53,560 --> 00:01:59,950 real quick before this you must provision the required hosts with supported configuration yourself. 27 00:02:00,010 --> 00:02:05,530 So the different between the first two and kubeadm is that the first two provisions a VM with supported 28 00:02:05,530 --> 00:02:12,910 configuration by itself, whereas kubeadm expects the VMs provisioned already. At the same time it allows 29 00:02:12,910 --> 00:02:18,280 for deploying multi-node clusters, whereas the former doesn’t. Again deploying a kubernetes cluster 30 00:02:18,280 --> 00:02:24,670 locally on a laptop is usually for learning, testing and development purposes. For production purposes, 31 00:02:24,670 --> 00:02:30,430 there are many ways to get started with a kubernetes cluster. Both in a private or a public cloud environment. 32 00:02:30,460 --> 00:02:37,330 I would categorize them as Turnkey solutions or Hosted or managed solutions. Turnkey solutions are where 33 00:02:37,330 --> 00:02:43,210 you provision the required VMs and use some kind of tools or scripts to configure kubernetes cluster 34 00:02:43,330 --> 00:02:44,040 on them. 35 00:02:44,140 --> 00:02:49,630 At the end of the day you are responsible for maintaining those VMs, and patching them and creating,upgrading 36 00:02:49,630 --> 00:02:56,200 them etc. But cluster management and maintenance are mostly made easy using these tools and scripts. 37 00:02:56,380 --> 00:03:03,970 For example deploying a kubernetes cluster on AWS using the KOPS tool. Hosted solutions are more like Kubernetes 38 00:03:04,030 --> 00:03:09,760 as a service solution, where the cluster along with the required VMs are deployed by the provider and 39 00:03:09,760 --> 00:03:13,220 kubernetes is configured by them by the provider. 40 00:03:13,240 --> 00:03:15,210 The VMs are maintained by the provider. 41 00:03:15,220 --> 00:03:21,040 For example, Google Container Engine lets you deploy a kubernetes cluster in a matter of minutes, without 42 00:03:21,040 --> 00:03:27,620 you having to perform any configuration by yourself. Let us look at some of the Turnkey solutions. 43 00:03:27,620 --> 00:03:31,010 OpenShift is a popular on-prem kubernetes platform 44 00:03:31,050 --> 00:03:36,680 by RedHat. For those of you who may not be familiar, OpenShift is an open source container application 45 00:03:36,680 --> 00:03:39,700 platform and is built on top of kubernetes. 46 00:03:39,770 --> 00:03:45,920 It provides a set of additional tools and a nice GUI to create and manage kubernetes constructs and 47 00:03:45,950 --> 00:03:49,640 easily integrate with CI/CD pipelines etc. 48 00:03:49,910 --> 00:03:53,000 We have an OpenShift for beginners course in our catalog. 49 00:03:53,070 --> 00:03:55,190 Check it out if you are interested! 50 00:03:55,190 --> 00:04:00,740 Cloud Foundry Container Runtime is an open-source project from Cloud Foundry that helps in deploying 51 00:04:00,740 --> 00:04:06,540 and managing highly available kubernetes clusters using their open-source tool called BOSH. 52 00:04:06,560 --> 00:04:11,930 f you wish to leverage your existing Vmware environment for kubernetes, then the Vmware Cloud 53 00:04:12,130 --> 00:04:15,910 PKS solution is one that should be evaluated. 54 00:04:16,070 --> 00:04:21,440 Vagrant provides a set of useful scripts to deploy a Kubernetes cluster on different cloud service 55 00:04:21,440 --> 00:04:22,880 providers. 56 00:04:22,880 --> 00:04:29,000 All of these solutions makes it easy to deploy and manage a cobra that is cluster privately within your 57 00:04:29,000 --> 00:04:30,090 organization. 58 00:04:30,110 --> 00:04:34,720 You must have a few Virtual Machines with supported configurations in place. 59 00:04:34,760 --> 00:04:38,470 These are few of the many kubernetes certified solutions. 60 00:04:38,570 --> 00:04:44,420 Well there are many more, so check them out in the kubernetes documentation page. Let us look at some 61 00:04:44,420 --> 00:04:50,180 of the hosted solutions. Google Container Engine is a very popular kubernetes as a service offering 62 00:04:50,270 --> 00:04:55,640 on Google Cloud Platform. Openshift online is an offering from RedHat where you can gain access to a fully 63 00:04:55,640 --> 00:04:57,910 functional kubernetes cluster online. 64 00:04:58,460 --> 00:05:04,770 Azure has Azure Kubernetes Service. And finally Amazon Elastic Container Service for Kubernetes 65 00:05:04,820 --> 00:05:09,910 is Amazon’s hosted kubernetes offering. Again, these are just some of the solutions 66 00:05:09,950 --> 00:05:12,710 there are many more. So what is our choice? 67 00:05:12,710 --> 00:05:17,870 In our case since this is for learning purposes and considering the fact that some of you may not have 68 00:05:17,870 --> 00:05:24,620 access to a public cloud account and since most of you mentioned in the poll we sent out that you prefer 69 00:05:24,650 --> 00:05:27,000 a local setup with Virtualbox, 70 00:05:27,080 --> 00:05:33,470 we chose to deploy a local kubernetes cluster from scratch on our local system by creating several 71 00:05:33,470 --> 00:05:35,520 virtual machines on VirtualBox. 72 00:05:36,350 --> 00:05:43,280 So our design now has 3 nodes, 1 master, 2 worker, to be deployed on a laptop with Virtual Machines 73 00:05:43,280 --> 00:05:45,630 provisioned on VirtualBox. 74 00:05:45,920 --> 00:05:47,810 Well that's it for this lecture. 75 00:05:47,810 --> 00:05:52,190 Check out the reference page to read more about many more such solutions.