Cloud Native Computing Foundation KubeCon + CloudNativeCon China 2018 (Shanghai), 21 Apr 2021

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From YouTube: Intro: SIG Apps - Janet Kuo, Google

Description

Join us for Kubernetes Forums Seoul, Sydney, Bengaluru and Delhi - learn more at kubecon.io

Don't miss KubeCon + CloudNativeCon 2020 events in Amsterdam March 30 - April 2, Shanghai July 28-30 and Boston November 17-20! Learn more at kubecon.io. The conference features presentations from developers and end users of Kubernetes, Prometheus, Envoy, and all of the other CNCF-hosted projects

Intro: SIG Apps - Janet Kuo, Google

In this Kubernetes SIG Apps Intro session, you will learn about the areas of our focus, what we are working on currently, and how you can get involved. Veteran SIG Apps members will be on hand to help answer questions.

To learn more click here: https://sched.co/FuLH

A

Hello, everyone so, and in this session, I'm going to talk about give an introduction of sick, apps and I plan to do it in Chinese. So if you need the translation, then you should put it on.

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So today, I'm going to present see that my name is Janet cool, I'm software kenji, an engineer from Google.

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Also, the conference co-chair.

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These are our leads. They can't be here, I'm, sorry about that and I was become behalf of them and if you want to maybe chat with them a little bit, you could find their contact. Information here have their IDs here and before we officially start I would like to ask if there's anyone here knows anything about Singapore has ever attended our meeting. Please raise up your hand only one, okay good, so you are exactly my target audience today. So, first of all, what's see gaps well, it means a special interest group.

B

It's like within our cabinet organization. We have several groups each responsible for a code.

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Example, we have C capped and we have also the Box assigned.

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Us so the gaps, obviously we're responsible for applications, for example, if you want to deploy or upgrade any application on Cuba naughty.

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The user experience in AP are related to it our responsibilities. For example, we will be responsible for workloads API relevant to apps, for example, that deployments table set these api's.

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If you don't know about workflow api doesn't matter later, I will talk more about it and then other tools relevant to applications like applications. The Rd.

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Is like a custom resourced definition. It is an extended API to define what an app is and then with applications the Rd. You can show all the resources relevant to the app in your UI and all about its descriptions and, of course, you can do cascading relation directly through it.

B

And other tools helping you develop and manage your applications, for example, compose which could help you shift a darker profile to a Cuban, ite amo profile and we care about all the application developers and operators experienced. So if you have any problem in using them or you think you want to add some new features, we'll welcome you coming to us and.

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B

Your suggestions every week we would have them secret meeting.

B

It will be held at 9:00 a.m. PST, every Monday and I. Guess it's probably one a.m. in China or what.

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A.M. yeah, so maybe not that convenient for the Chinese participants, but it doesn't matter. We were to put the video recordings on youtuber and, of course you could contact us through slack channel. You know, Supernanny has a slight channel and at each meeting we, the the chair, would make some self introductions first of all and.

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Some announcements, for example, some big news recently and then make some surveys sometimes and release a survey results and those who are interested could apply in advance because lived on the tool or the app, and they want to make a demo to others or they think they want to add some new functions to kubernetes and we've designed a prototype and they want to sign up for a demo and the gap.

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Members will offer you the most in time feedbacks and, of course, we will have some scheduled discussion topics, for example, on how will we continue this API and what changes were going to make and, of course, you could register on the discussion. Topics included into the topics and the rest of the time will be for open and free discussion.

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Course I mentioned workloads API. So who knows about workloads? Api, please put up your hands. Okay, try.

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Apparently, it enables you to run your work clothes. Well, what is work-life? It is essentially your applications in different times. You have stateless or stateful workloads, for example, in the database in the apps, are the stateful once and for web servers. For example, they don't store any data, those are stateless or some batch workload. You know they are processed in batches, so they need to be done with batch workloads and.

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Have different types of API for you to use, for example, the first is for deployment, it is a stateless one.

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For example, you want to start three engines max and you want them to be scheduled to a certain node, and then you ask for three engine max for deployment and if one part disappears and the node also fails, then you need to start a new one and update the deployment.

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It will help you automatically update the part in the bottom.

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Then replica said.

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Is a like a deployment detail? It doesn't directly create parts it creates replica set for version management, for example, for the old version.

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Then it has a corresponding replica set to take care of it, and if your deployment is updated to a new version, it will create a new replica set and a new replica set well start new part, and then the deployment will gradually go down the old replica set, and this is the back to replica set and about a replication controller. It is very similar to replica set it's just in case a kind of old API.

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Know it has replaced by replicas that, and if you don't know about replication controller, you don't need to know about repeater set actually and then it's stateful set. What does that mean? It is like your data base, your distributed database. If you want to store data in the backstage, for example, Cassandra or zookeeper, it has three parts and maybe between each parts they want to know IDs of each other.

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The first one should be able to find the second and third one and behind each part, the.

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Relevant data should be stable and applications of this type needs a stateful set.

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To be applied on applications where you need to store some states and then it's job job is for batch processing. For example, you may give an order that I want to.

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An email to a million people, so that's loads of information, and you write it in the job and let it run and for each job it could run like 100 parts and each part would be deal where they're processing so job. It is just like a parallel processes to process a.

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Number of tasks at the same time and cron job is to, for example, you want to run a job every hour, and then you can use cron job in which you could set. How long you, how often you.

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Want a job to run and.

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For the implementation here it has a time schedule.

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It is like a time keeper and when that time comes, a job will be created and learn about daemon set.

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Set is to run a part on each node, for example, when you want to do matrix or collect metrics, or you want to save some logs and on each log, you could install a daemon set part to help you capture the log and save somewhere so applications similar to this. If you want to install something on to the node, you can use daemons net and what about the future of workloads? Api we've mentioned some api's.

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To review back a little bit, they're all stable, but as it means stable, it means all the api's. We have three stages alpha beta and then.

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A p I, it has v1.

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Like version 1 and it's state and for better like for cron job, it ISA better, so it it's version code is v1 better one. So you can see. Cron job is the only better among these and in the future we may want to add some necessary features. Necessary functions to up grade A to G.

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You do machine learning, you may create a large number of jobs at one time and later, who will delete well now in the system, there is no mechanism to delete them. You need to delete them manually and that's a big trouble so for also 1.12 I, designed a garbage collection feature which can help me delete, for example, other jobs when they finished running within one hour after they finish running.

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Ttl, maybe or you can select some other time, you can try this. It is still alpha and when they need your help to test and improve it.

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Next, another direction.

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Eastern sent.

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Just now for reaction team and said no.

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One function.

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C

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C

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Find whether we're to scheduled about Reza, oh there are three nodes: two of them are occupied and one is still vacant. There is another part coming in, then the scheduler will select replace it. The.

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Is locked in a vacant lot.

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One node with one part very.

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E

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Not need to be scheduled through the.

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Actually use the new features, so the theme is that.

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Schedule can be scheduled through the default.

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Scheduler, the main.

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Reason we do this is to not a new feature so that.

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Much party can.

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Be sent their priorities, for example. Yes, we carry pods and one with a higher, then we'll schedule it first.

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Can also replace the no priority pump.

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With a high one.

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With that feature, we.

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A central scheduler.

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Each politician.

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Due to this feature, design in.

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Promote the teacher to better version, the next future.

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Storage aware scheduling.

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Are some storage.

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Underneath then,.

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You hold the storage position or boots within the same note,.

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C

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In 1.13, this feature will be stabilized because we're going to release 1.13 if you're interested you can follow.

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The story, storage,.

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A proposal but it to be implemented in the future. There.

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C

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Times when you upgrade it.

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Can be upgraded by each dong order if you want to specify.

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Don't want to go service disruption between each volumes.

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You can't define.

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Each song, how.

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Many disruptions are allowed.

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Or the maximum disruption.

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The new feature disruption budget.

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Say there are three parts, then in synchronization only I.

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Disruption can occur.

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It doesn't take into account topology, then. My proposal here is topology aware disruption budget, which means that's another parameter topology. What's on set.

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Closed API in Cooper needs or.

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Know then I will talk about some tools and.

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You wanna know how.

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The project synapse.

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You don't know what it is, you can imagine it as he go behind.

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A package manager just.

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You want to be still app.

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So it's a similar.

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Effort to download the application package, for example, if.

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Don't want to rather Yama file. You can use how.

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Originally, these are projecting signals.

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Has turn of CN CF project.

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One part of health.

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Package of hell misquoted, charts you can think of as.

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D

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Application, if.

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You're interested in charts you're welcome to attend their meetings.

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Has held every other Tuesday but I'm not quite sure, the exact time.

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You're interested to take part in the development please.

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Link all you have any questions you can raise in this.

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Other Tuesday.

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If you look for.

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To github someone.

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Will provide the repository or you can look like your own depository to restore all the charts and.

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Package and if.

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Others would like to install them. They can't Disick making repository and search for the chart.

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Way, every time when you search you need to look for your repository in which chart and the next repose over is that all of these search features can be integrated so that you could only search once somewhere. I. Look for the apps in the whole repository next cube, apps, which is.

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Ui of hall charts.

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Can search for charts, install them and update them up take kubernetes.

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Application finally,.

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Application CRD: you briefly mentioned that it helps you.

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Works to define what all features are there in.

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Whole app package.

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Example, the sap is.

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Its name yeah and can.

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You deploy Minot's directions.

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Other jobs, then.

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The three features it can't be packaged within an app and you can define by abdication CR.

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Discuss some, you recommended apples.

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Are some recommended.

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Your application for.

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To write gamma file, my sequel, for example, application name equals.

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Label as the name of the application to put in the ammo.

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Everyone every want to use the same label.

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All of the tools can be easily integrated.

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Is my last light.

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About so many tools, we have other ecosystem projects.

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For example, compose as.

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I said it translates a darker color file into Cooper Nate's, resourceful.

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Monocular, it's.

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Also, a whole new chart with no.

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C

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See help charm posit rate.

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Support for Amazon, s3 or.

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I'm not quite sure whether you can use Google Cloud storage, but Amazon s3 is.

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If you have Fortuna carbonates file.

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C

That it's very.

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Long to include a lot of stuff, so catch.

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A simple, easy and decorative layer to define your mo coat. There are only three to four lines.

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Automatically transfer to llamo file, but it cannot cover only use case. The basic ones then matter controller. It's a framework before.

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All of these controllers and carbonates provide you.

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There's a controller behind.

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Deployment controller.

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What to do with the project, for example,.

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Off the cassette great pops.

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Up or scale up or scale down the.

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Is what the controller does.

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Cooper needs if I want to write a controller.

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C

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C

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Behind the controller they're, not a complicated project, logics.

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You also need to write enough Florence for urban age to go. Neither controller integrate all the complicated.

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You need to do is put in your the.

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Important project.

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Of the implementations behind all of the complicated details are our natal and all of the business logic can be written in either any.

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It's like a web book.

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Just enjoyed it to you, the meta controller and it worked out all the equipment. Active parts.

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Don't need to know much about Copan AIDS implementation. You can write your own control.

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It to our back.

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C

Developed from our community, you can't.

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Define? Who can't access order to or back.

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If you were a cluster and me you can set each one on.

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Me know, which is.

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Quite troublesome, this tool, charts, API server, ordered.

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Into the articles, it reads all of the API server audio box and translate to our back rules.

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Birds not not be official.

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In her bikini there.

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Are the way around you can generally the rules.

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From this, the.

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Next feature is Nestle: it's the kubernetes monitoring tool.

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C

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Developed by Microsoft and.

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Makes it easier to Butte kinetics application.

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Even you don't need to install covalence scaffold developed by Google. Also, an open source tool facilitates continuous development for various.

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Where CSE on.

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Tools, Google s, it's the company's native open-source cervelas tool and we still have mainly our chores to come.

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You're very satisfied with your project and suitable for future state gaps. You can tell us to put it in its pasta gaps so that any other people can see it and any feedbacks or if.

B

You want to adopt other tools. We also welcome your.

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B

D

Your feedback so.

B

This is my presentation, any question.

B

In addition to.

B

Others are still in the a stage so later for their future. How will they be further developed? Well, ok. Your question is like for workloads, API.

C

B

Of them are stable and what's their next step. Well now, if you observe carefully cavalettis, you may find that it is getting more mature.

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B

Current guiding role is: if we are going to add some more new features, we would not add them to kubernetes call like the application CRD. We plan that you added to kubernetes call, but the results. After the discussion with the community, we decided to make it external extension first and then, if it is popular enough, we will add it to that to the latest call as a feature and in the future for other API. They will not be the same first of make them stable and if we are going to add them.

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B

C

B

Format of extension, but of course, for the existing API. So maybe there are some mud effects, for example, for certain appointments if they don't make sense to some extent, we may improve them and then upgrade them to be to.

C

B

Other question.

B

Do you have any attempt to standardize the building of applications in the community.

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We have problems.

C

B

Like form the hammer or chart, we have different ways to achieve that. So if there are any attempt to turn them offenders back because nowadays most approaches are more Microsoft specific. So do you have any idea.

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B

This respect, what for our for us for see gaps, although we host some other ecosystem project, but our principle is like we would loft back up any other solution, even though it is a Google solution, it's not that everybody should adopt it. We hope all the community members could make use of versatile tools and then tell us which one is the best which one they like the most.

B

Maybe they can offer us some suggestions to integrate to towards into one, but we normally don't directly tell you which one is about to which we standardized any other question.

B

B

But I know you may come across some problems in running demon fans, even though it is our idea, GA API. So if there any consideration to improve it, for example, when you upgrade a demon set.

B

It may encounter some obstacles.

B

I've asked these questions in the community before but I've got no answer yet I mean Reggio is shoot, but I could not reproduce the bot well, which version of kubernetes were you using in 1.9, I, suppose I looked at the code and I?

B

Yes, it's might be a result of the design. Maybe later we can talk in private, okay, so time is running out. If you have any other question, you could come directly to me later.