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‫For Kubernetes, it's a series of

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‫different containers. We've talked about that. On top of

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‫that, you have a command line tool that's

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‫not necessarily bundled with those containers that run on

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‫the server. So, you've got some more parts than Docker

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‫would normally have, and there's different ways to set this

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‫up. In fact, there's tons and tons of ways to install

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‫Docker. There's lots of distribution.

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‫There's lots of installer tools.

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‫Each way will be slightly different and package different

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‫containers. Largely there's going to be the same four

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‫or five containers that you have to deal with. We're really

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‫focused just on learning right now.

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‫So, I want to get you the local setup, the

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‫easiest way for you to use. There's certain other things

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‫that I look at, too, for the best way to install is, what

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‫is RAM utilization and is it easy to turn off?

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‫Because these are things where you've got a lot of

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‫containers running in the background. You may not want

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‫those to always be running. You know, how is it easy?

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‫Is it easy to reset it?

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‫Is it easy to use with my local system?

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‫Rather than just always having to refer to some foreign

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‫endpoint somewhere else. With Docker

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‫Desktop, if you have Docker Desktop, that's

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‫the best way to go. That's the easiest install of all

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‫Kubernetes. If you have Docker Desktop, just use that.

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‫If you have Docker Toolbox, then you're probably going to

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‫want to use minikube, which is very similar to the Docker

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‫Machine command line, which is what makes Docker Toolbox

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‫work. We'll talk about that in a minute.

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‫If you're someone who's got Linux on your desktop or you

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‫just want to do this natively in a Linux VM you've already

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‫created, either on your machine or on the Internet, then

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‫the easiest way there to probably set it up for learning

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‫purposes is Microk8s.

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‫It's made by Ubuntu, but you can install it on a

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‫lot of different distributions. It's not specific to just

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‫Ubuntu. If you're just not at

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‫a place where you can install Kubernetes, or you don't want

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‫to create a cloud VM or whatever, and you just want to

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‫learn it in a browser, that's fine too.

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‫There's two good options one of them is play-with-k8s,

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‫which is made by the same group as

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‫play-with-docker. Then there's katacoda.

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‫Katacoda is very similar.

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‫In fact, if you looked at both of these tools, they look

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‫like they do the same thing.

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‫The slight difference there is that the

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‫play-with-k8s requires that you actually install the

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‫cluster and set it up.

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‫Katacoda already provides the setup for you.

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‫It's, I think, a better tool to learn with

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‫because it doesn't require you to worry about installation,

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‫which you might just wait later to learn how to do that and

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‫just focus on how it works, what the command lines look

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‫like, and stuff like that. If you had to choose between one

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‫or the other, look at the resources of this lecture for

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‫the link to the katacoda playground.

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‫For me, I would prefer Docker Desktop because

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‫it provides me several things out-of-the-box. One, it's a checkbox

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‫to install Kubernetes on my existing Docker setup.

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‫Whatever the Linux VM is on Mac or Windows, it's

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‫going to automatically add the Kubernetes setup to that.

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‫Then it's also going to install the kubectl command

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‫line on my local machine, whether it's Mac or Windows, and

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‫make sure that version is the right version to match to the

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‫server. In fact, if using Docker Desktop Enterprise, which

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‫is a new paid offering from Docker, they

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‫actually allow you to swap between different versions of

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‫Kubernetes on the fly in case you're maybe in

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‫an Enterprise environment that is specific to different

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‫clusters running different versions, and you want to test

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‫different versions locally very easily. Most of us won't

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‫need to do that. So, the free version of Docker Desktop

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‫works just fine like you use in the rest of this course.

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‫The other nice little thing there is that Kubernetes uses

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‫up a decent amount of resources on your machine.

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‫Docker is already using resources so it's sometimes

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‫a little tight to also running Kubernetes on top of that

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‫and then get the rest of your work done.

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‫So, Docker Desktop provides

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‫a quick little checkbox in the menus to allow you to

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‫disable the Kubernetes part of the cluster while still

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‫leaving Docker running.

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‫That's a neat option because sometimes I just want Docker

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‫and I don't need Kubernetes.

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‫All right. Next up, if you're a Docker Toolbox person,

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‫minikube is the closest replacement to that.

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‫It doesn't even need Docker Toolbox to

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‫be installed, so you could totally just run this

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‫separately.

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‫It's very similar in the way that Docker Toolbox works.

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‫I think for those of you using Toolbox, this

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‫will be a similar experience. You would download the

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‫installer on Windows for the minikube

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‫binary and it would install that.

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‫You could just download the binary directly from GitHub or

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‫you could just download the installer.

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‫I kind of like the installer just because that's the

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‫Windows way of installing things.

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‫You can also get it off Chocolatey, if you're into that.

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‫Regardless of which method you get it downloaded, it's a

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‫single binary, and once you get it there, you just type

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‫minikube start. That assumes you have BirtualBox installed,

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‫which if you have Docker Toolbox, VirtualBox would

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‫have been installed already. The nice thing is, is this

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‫uses that same virtualization backend by default.

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‫The other thing is that the commands of it are very similar

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‫to Docker Machine as well. You start.

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‫You can remove a machine.

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‫You can reboot the machine. You can do all those typical

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‫things like you could with Docker Toolbox.

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‫But the one gap here is that it doesn't install the

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‫Kubernetes command line that you would most often use,

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‫kubectl, which is what we're going to use throughout the

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‫rest of this section.

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‫So, you're going to have to go and install that separately,

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‫which is just its own single binary.

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‫There's multiple ways to install it.

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‫In fact, when the minikube is finished setting up,

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‫it will give you a URL that you can go find the

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‫instructions on how to do that.

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‫All of this really shouldn't take you very long.

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‫All in all, it's really just VirtualBox and a couple of

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‫executables on your machine and away you'll go.

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‫You'll have the VM running. It'll have kubectl on your on

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‫your Windows machine that talks to that VM, and then you're

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‫ready to start. For those of you that are on Linux

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‫as your host OS, or you just installed your own

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‫Linux VM, or maybe using a Linux VM in the cloud, the

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‫easiest way I think to get Kubernetes running on that

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‫machine is to use Microk8s, which is

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‫from Canonical, the company that makes Ubuntu, but

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‫it works on any Linux distribution, I think.

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‫I checked the list and it was pretty comprehensive.

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‫It installs using Snap.

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‫If you're not familiar with Snap, it's a different type of

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‫installation technology, but does the same thing is

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‫apt-get or Yum.

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‫You just have to get Snap installed first.

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‫If you don't already have it, you can just type snap and if

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‫it says it can't find the program, then you know you don't

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‫have Snap installed.

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‫You can probably find Snap in apt-get

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‫or Yum. Once you have that, you would use a Snap command

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‫to install the Microk8s.

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‫Once you've done that, it will do everything else for you.

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‫It will install all the different master roles.

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‫It will automatically install the correct version of

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‫kubectl. It gives you a nice set of commands to

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‫manage the Kubernetes system with

153
00:06:39,450 --> 00:06:42,839
‫microk8s.something. You can do microk8s.enable

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‫and other different commands. If you just type microk8s.

155
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‫and hit your Tab key a couple of times, you'll see

156
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‫it list out all the various options.

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00:06:50,490 --> 00:06:52,940
‫It's easy to manage that, even uninstall it pretty

158
00:06:53,580 --> 00:06:55,260
‫quickly if you don't want Kubernetes anymore.

159
00:06:55,770 --> 00:06:57,719
‫The one quirk with this one is it doesn't give you the

160
00:06:57,720 --> 00:06:59,407
‫default kubectl out-of-the-box.

161
00:07:00,060 --> 00:07:02,879
‫I think that's to keep it from conflicting with...maybe if

162
00:07:02,880 --> 00:07:05,526
‫you have kubectl already installed, it gives you a new

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00:07:06,060 --> 00:07:07,744
‫command that is the microk8s.kubectl.

164
00:07:09,480 --> 00:07:12,119
‫What I recommend is if using Bash or Zsh is

165
00:07:12,810 --> 00:07:15,749
‫to go in to your profile that automatically runs

166
00:07:15,780 --> 00:07:18,689
‫every time you log in and simply add an alias

167
00:07:18,960 --> 00:07:22,139
‫so that you can type kubectl and it will control

168
00:07:22,320 --> 00:07:24,917
‫this cluster. As we go through the examples with that

169
00:07:24,930 --> 00:07:27,599
‫command line, I don't want you to keep forgetting that oh

170
00:07:27,600 --> 00:07:30,050
‫yeah, on my machine, I have to type microk8s.kubectl,

171
00:07:31,260 --> 00:07:33,660
‫right. So, you definitely want to make that alias.

172
00:07:33,690 --> 00:07:36,600
‫I always do that. A little tip there is I actually

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00:07:36,900 --> 00:07:40,110
‫just make my alias the letter K, so I didn't have to type

174
00:07:40,350 --> 00:07:43,139
‫kubectl. I can just type K and then something else,

175
00:07:43,300 --> 00:07:46,439
‫right. You could do that as well instead of the full word

176
00:07:47,130 --> 00:07:49,019
‫kubectl. That's maybe something you do later once you've

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‫got all this stuff down.