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From YouTube: knative on Gloo

Description

Deploying Knative using Gloo as Service Mesh

For more info, see https://flaviof.com/knative/

Content Timestamps:
[00:10]: github (https://github.com/flavio-fernandes/knative_demo)
[00:47]: control VM provisioning
[00:59]: creating k8 cluster
[01:06]: knative basics
[01:40]: kubernetes, service mesh and knative basics
[01:50]: solo.io Gloo
[02:05]: the main parts of knative
[02:24]: knative serving
[02:38]: starting Gloo (and service mesh)
[03:01]: set dynamic dns to public ip via postman
[03:07]: push docker image to google cloud (to serve w/out building first)
[03:17]: top section shows default namespace in k8 cluster
[03:25]: deployment w/out knative comparison
[04:15]: deploying same app using knative yaml
[05:03]: k-svc, route, configuration
[05:36]: forcing restart
[05:52]: blue and green demo using knative
[07:48]: deploy from source via knative
[08:04]: config secrets to push build images
[08:34]: build section in yaml for knative
[08:53]: tweak source code example
[09:06]: building image stages
[09:32]: using image just built
[09:44]: deploying another revision of same app
[10:13]: cleanup time
[10:21]: some of the tools used
[10:26]: the end

A

Hello, I'm, Claudia and I'm gonna show you K native, which is a platform type of service mesh. To give you some really nice and handy way of deploying services, I'm, just gonna start off by doing a clone, okay other one, which is just a little hat, which I'll show you in a second start virtual machine when I got into this machine. Show you this little bass app that you can hit and get a bunch of information about. We ask delays to make it take longer to reply.

A

If you want to make it longer and boom mistakes me make a crash this app fort from Shiva. So thank you see before that. I just focus on PFE, probably found elsewhere. So everything I've done here is really taken from somebody and collage together, take a look, okay, bacon file and it's just all the provisioning and there's a bunch of things that are ready, install project but I. Don't really have a good burn a nice cluster yet, which is what I'm about to do here and that's gonna, take a few minutes.

A

So, while that's happening, let me show you this slice here in kubernetes. You can have this right up, you push it to some source control somewhere. Do the image for it push that image somewhere then write an IMO file to represent your climate and then worry about services and how you can export to that once it's running to the outside world and then launch it in the K native way. You basically have a much simpler path. You right away, push it to the source, control that source control or we're automatically building it.

A

Also one yellow file. You can you this service not only encompass how you want the app to behave but deal with revisions and you with the whole serviceability of it. You have kubernetes and you have the operators and they have service mesh, which gives you all the things that you run on kubernetes get taken care of. You can use Sto or in this case, for this demo I'm, actually using glue from solo tile, which simplifies service mesh and it's the same platform that a native is built upon.

A

So it doesn't really care that is tasty Roku underneath it, but at the end they have developers were able to push build and deploy that you have three pieces que native one is serving the other.

A

One is building like I'm showing here and the other one is eventing I'm not gonna cover eventi much in this video, but you can kind of have an idea that eventing pretty much relies on the build and the service which are building blocks for providing server lists and within serving you have these three major pieces, the service and routes in a configuration. Don't confuse this service with kubernetes a service. Let's go back to a workflow here, but I have a cluster.

A

Save, always call these bits into a file install the service Massie's to a group like I was talking earlier. Oh that's, bad! This is the piece that you give us the service match for this demo. Playing kubernetes would have to default. The public in the system now that we have glue and glue is running its own namespace.

A

We also have the K native serving now I do have a public IP address which I can use to get into my cluster from the outside and I'm, using postman link that to my own domain cake so say that and then push that up to my registry right, which you can weaken here there is yep, it's pushed it it's there so now, I can deploy things and kubernetes and refer to this image.

A

Oop just show you what's in my default, namespace right now: it's not even a real spark, which is the only way of doing it right. So if you had a two part of it, you have a deployment part. You have a service part I'm, not even doing the part that does the load balancing. So this is just to be exported internet communicates it. You see the to that because make it more complete. We also create a load balance by which I'll just do it extra a year.

A

We'll do that and then we will export it and another public address I can get to from its fur. Giggles I'm gonna create another pod here in my mission in just a minute or two back. So this is me hitting this from their money. Doesn't one of those two pods I get a number of hits it's going up, based on which one is getting hit and then have a different, so yeah, that's all good! You just get out of here clean this mess up all right, you're gonna tip you even idea.

A

So this is what we did. We just did right and this is accomplishing the same thing to K major. So this is the entire Yama file and don't get confused. Like I said the service, we encompasses the two parts that was mentioning earlier entity, routing configuration you know, touch wanna put to that. Could we do the next demo? We got service, auto scaling built-in. We can get things like scale to zero. So if an app is not being hit or not running for a while, it would go away.

A

The service remains, but the pod stops running. So you get all that nice and this I was scaling for free and started here. So you can see camel. Does my cluster you see here, every image wants to deploy, gets a revision number, what I call external name, so this kind of routes to the proper revision based on whatever who just to show you the various pieces at play. Here we have a memo on creating service and eternally clean. A bit is actually creating a route in a configuration to determine what to do for that service.

A

At this point, I should be able to actually hit that the target, and you should look at this. This comes from I.

A

Can also take this to my post inside so here.

A

I can do the boom keep an eye here for the restart you see that we hit and then we start no problem scaling apps coming down. All that can be specified in signing CM file clean, is up and prepare over the next piece of this talk, which is the blue, green asana canary deployment.

A

Instead of having a service, imagine having a configuration in a row, so we can more time so I'm actually operating at this level this time around, because I need a little control over how I wanted to route traffic and how I want the images are broken it up into two and that's what this part it's just time that I just created.

A

Surely you see that there are no K native services, but we have we have running on bring one to make this thing kind of fun. That means little spin loop here, which is Carl get on that part and right now all we have is the blue 100%. So there's not much more else. I can go so, let's eat a green okay and we'll show you what that looks. Like change the image to green and I added a new revision under the route section, but I made it 0%.

A

So even though it's there enemy has that explicit, named house name that uh-oh exercise in a second everything is to being a representative look because I have an explicit way of getting to that route. I can actually go in, but if I explicitly go to vtune, I will bypass the route and get the green.

A

So that's the part. That's kind of interesting with the rats show me the tip, speed something speed, changing everything that was 115 in 0 to 15. So now it should start seeing some greens and blues here and then, if I wanted to I can just go on % ring which, as you imagine, changing the blue to zero, making the green under person so yeah percent again, and that's that or they bring in good part of this demo. So let's clean this up now final part- or this talked I- wanted to show you in this field.

A

This would apply. Can you build template capability for this demo I'm using mechanical? There are a couple of choices and go it's very simple. The field templates, because I did that now you'll see a new Andrew name space. Here we turned on the capability for me to build. I need to push this build in to knock her out so for that I need to give it. Some sequence show you these pieces here.

A

So this is what a secret would look like, and then you create a service account and then, if you were to just do it bill what template you using pointed to the source, the branch where the source is anywhere, you want to put built image. You know doctor I owe you know it's how to do that, because he has information on my user and at this point let me show you what's different soon.

A

They wanted me to very explicitly tell me what the images to do native to where you're actually telling, where code is section here that didn't exist in full version, one exists in there and then I'm changing the target. So this is a commit entirely right here. Actually, I want to change the source code to prove you that I'm not checking you, but that I'm just gonna go here. Okay, I'm, not a bug and I want to lose the same.

A

So save this all right, just punch it don't you do what's gonna happen here, it's kind of fun. Okay, the first thing gonna see is a pot was created in my name space and he sees them to these stages stage. One is pulling the image stage. Two is building and at stage three would be to push that image to the right place can actually see what happened to clarity, the pot is and how they build, succeeded or not, and the image they got created.

A

The kinko tobacco hub see that clanking me just feel so seconds ago latest take look at say we good that's the lease we added target. Now, if you wanted to, you could change you back. So let's say I want to go back to the image that we had in there for one so I just do that. Apply that and you guys feel version to being populated here. Look we're right! You'll see! You know I'm back to initial image once again. No back, do you see a revision three happening here?

A

No, it's same just thing is this happens. Maybe the other ones will be scaling down to zero because they're not gonna use. So it's not it's. Not some people just grow forever. Go back here, take one more version, just for the fun of it. Let's see one more reading it that's about it. Look. This is custom here we are done just go back here. I just want to make mention and all the apps that used to produce this. Thank you very much.