Flatcar Container Linux Tech demos, 22 May 2020

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From YouTube: CoreOS to Flatcar Container Linux migration demo

Description

Flatcar Container Linux is a drop-in replacement for CoreOS Container Linux. In this demonstration, ww show how to update an existing CoreOS node to Flatcar Container Linux and how to use the Kinvolk Update Server to manage updates.

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Right so on this mo, I want to show a couple of things. First, is this update.

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From korres container linens to flat tire container linux, that any was.

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Mentioned him before and I'll also take it, take the opportunity to showcase the.

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Kim book update server, so the first thing I'm going to do is I'm going to.

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Logging in to an instance that I prepared before of the king bhagavate,.

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Server, so this is what a company that has the managed service good seat so.

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Let's go to webinar demo and that the first thing that appears here is the.

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Github authentication, so we use all to authenticate into the instance. So you.

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Need to be added to a group to to be able to log in thankfully, I'm added to.

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This particular group, so I'm going to sign in and yeah I'm gonna vary by.

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Myself, because security is pretty important to us just a second there. We.

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Go and now I'm going to authorize the application yet to authenticate these.

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Yeah and that's it so I'm logging in to the king for grab a server service so.

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You see here one application, which is like a container linux. You could have.

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Several other applications that you see amok oracle, but let's focus on patrick.

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Continue links here and here on the right you can see some activity panel.

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Where you see all the relevant events that happened in the past, you see that.

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The some instance get updated and something just has some errors, so here.

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You can have an overview of what is happening, but let's get in and inside.

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The application itself we have these groups than any was mentioning before we.

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Have production alpha groups group which is yeah just to showcase how you would.

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Like to run some alpha institute in production and we're productions, table.

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Group, which is where all your instances will should be running- and you see here.

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That we have two instances so here on the right side of the screen. You see.

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Three machines and two on the top are already running platform.

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Like the container limits- and there are members of this group.

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B37 to which is the production, stable group and there's one instance on the at.

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The bottom that's running: korres, container linux and yeah the server.

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Doesn't know about it so, as any was mentioning in these groups.

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You can configure several things and things like yeah. What channel the group.

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Should be following, if you want update only in office hours and how many.

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Updates you wanna do every minute, so this allows you to you know fast.

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Finely grained control how you feel it should be at the point to your clusters.

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So, let's get in the one of these groups, the production stable, the one that has.

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Instances and here used to be yeah several graphics, so first you can see.

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The overall have a progress of the group, so in this case the two instances are.

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Running just completed the update, so yeah, nothing, I think, fancy here, but you.

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Could see how the update is downloading or what percentage of instances are.

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Downloading updates: what percentage of instances have.

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Installed, updates and yeah things like that and then have some charts here so.

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You can see in the last 24 hours or so what's the breakdown of versions in this.

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Group, in this case, they're all running stable, two, two, four: seven: six: zero. As.

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Seen here, but if you have several versions running in your cluster, you.

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Could see the breakdown, then we have another graphic that shows the status in.

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It in the past 24 hours or so, and this is the operations that happened in.

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Descent, so it would click here. We can see that yeah at this point in time.

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Between 6:00 and 10:00 p.m. yesterday, some updates, we ran it. Some of these.

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Were downloading, you saw some errors, so it gives you an a nice visualization of.

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What happened in the recent past your clusters, all right.

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So what I'm going to do now is I'm going to take this instance at the bottom.

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That's still running horizontally notes and I'm going to update it to faster.

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Signing into this group here yeah, so I have a script. I've written.

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It's a doing some things. First of all, you see that it takes a separate.

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Parameter the the group id and yeah this is so you can put this group here and.

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And the instance will join the group, then it downloads the official public.

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Key for the updates on flatter container linux and mount it in a right place and.

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As I said, this is just so the instance can trust of the update. This is good and.

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Trust it then we're studying the group to this.

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Group id that you neji patterson parameter and then this is the important.

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Part we point the update serve the update service to the server. That's.

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Running the team folk update service, so this url here and with v1 / update and.

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Then we set the instance version to 0.00. This is so we force an update so.

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Otherwise, it was all colony update. The two versions are newer than the one.

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That's running, and in this case it's going to be the same because we're we.

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Released what we have the same version as substring contain limits chorus.

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Integrity, so let's just run it with this group id and that's it. So it's all set.

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Now the next step is that we're going to force an update, we could wait for 45.

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Minutes or so so the machine doesn't automatically but yeah in the interest.

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Of times this just force it and there we go so this will query the server the.

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Server replies a there's, a there's, an update available here and it's this.

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Version so in a minute it will start downloading this update and yeah after.

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That it will apply it, and when you reboot, you will have a platform.

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Continuing this morning, so while this is downloading, let's do.

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Something else too, so, let's move one of the instances that were in the.

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Production, stable group 2 alpha, so let's pick this, for example, and to do this you.

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Just have to change this file here and instead of using this book id, let's use.

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This per buddy alpha one and then you just force on a date or wait until the.

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Instance, updates itself and yeah. It should get the alpha version from the.

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Server, as you can see here, there's an update available. It's two three one.

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Seven, oh one, as you can see here in it alpha channel and it will proceed to.

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Download it in the meantime, you can see here that the graph changed a bit the.

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Graphics, so that now that's 50% instance complete 50%, downloading and yeah. You.

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Can also see the instances they're assigned there and yeah. You can see that.

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The time line, which is also needed to see when things happened in a particular.

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Instance, let's go back to alpha in the other group we have, there is downloading.

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And yeah this will take some time, but eventually you'll end up with two.

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Instances are running stable and one instance that is, that is running alpha.

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And yeah: let's wait some seconds, and so you can show you the alarming screen.

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With the flatter container, linux message: okay, so this is this one finalized, so.

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Let's pretty good, and after we log in you should see yeah.

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Right logging now can just not boot it yet, but you can try again and there you.

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Go like a linear, cycling fault. This is the group, the stable group- and this is.

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The version that's running in the meantime the alpha instance finished.

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Downloading so this got updated and now same thing. I can reboot and wait a bit.

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So we can, you know that the update was downloaded and since the instance didn't.

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Query the server after it's been updated. The server doesn't know that it's.

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Already updated so, let's force another update here and the server will reply.

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Again, there's no update, but this is the way that the server knows that the.

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Machine was updated successfully, so if we refresh here all are complete now, we.

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Can logging into the instance we move to the alpha group and it's there again.

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Flatcar, but this time it's running 2 3, 1 701, as the alpha channel, shows and again.

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We can force an update, so the server knows that the machine is is good and.

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Then the update was successful and refreshing shows it. That's complete and.

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You can see here how it was running yeah. This represents actually version zero.

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And now it's fine to three 17.0 one so yeah great.

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That's pretty much it for my site.