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Lab 2

Build a Kubernetes Application

Novices | ~ 1 hour
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Learn about building an application in Kubernetes

  • How to build container images
  • Running your application on Kubernetes
  • Tools to improve your workflow
  • Kubestr overview
Getting Started with Kubernetes

Prerequisites

Read Blog

Building a Kubernetes application

Thomas Keenan • Instructor • Mentor • Contributor

in K10, Data Protection, Kubernetes, Community

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Watch Video
Lab 2 Video Overview
Lab 2
Review Slides
Lab 2 Slides
Lab 2

Hands-On Lab #2

Build a Kubernetes Application

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Ratings and Reviews

4.7
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162 Ratings
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What's your experience? We'd love to know!
Shawn
Posted 1 day ago
Great for getting your feet wet

I liked the lab, but would have appreciated more detail around Helm charts and the interaction between the Docker CLI/Engine, containerd, and run-c.

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Anubhav Vardhan
Posted 1 day ago
E-Book download not working

The e-book download provided upon completing the lab gives a security warning on google-chrome.

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Duane
Posted 1 day ago
Basics

Kubestr would have been nice to have a better discussion of uses and more on output.

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pradeep sanjeevaraya
Posted 1 day ago
step by step details explained well with decent introduction

Allow to download the charts/resources to run local or for later reference

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Newin Atmarumeksa
Posted 1 day ago
Engaging, interactive, and fun way to learn building Kubernetes application

Great stuff!

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Colin
Posted 1 day ago
Really informative

Another great lab, learnt a lot from this one, especially how storage works in a kubernetes environment. Great job.

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Alberto
Posted 1 day ago
Containers' concepts, k8s management, persistance

I like how the topic is organized

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Vineeth A C
Posted 1 day ago
useful

labs are very useful

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Nishchay
Posted 1 day ago
Really Informative!!

This was my first time reading about Storage Classes and the labs did a great job teaching it to me thoroughly.

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Luis
Posted 1 day ago
Great place to learn about Kubernetes

I really like the hand's on labs

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Lab 2 background

This lab is for those who are new to building applications to run on Kubernetes or want a refresher. It covers:

  • How to build container images
  • How to run your application directly and locally on Kubernetes
  • Tools you can use to improve your workflow
  • How to manage manifests for deployment.
  • Kubestr, an open source collection of tools to discover, validate and evaluate your Kubernetes storage options.

Is there pre-work for the lab?

Yes. Be sure to complete reading and studying this blog, the video description of the work to be performed during the lab, and the accompanying slides.

What is the structure of the lab?

The lab consists of two sections, both of which are approximately 40 minutes long.  Your time may vary, depending on how quickly you pass either section.

Section 1 — Applications Background

This section will cover background topics and terminology for the relevance and use of applications in the Kubernetes world. Each topic will provide some review material on screen first, then pose a challenge question. You must answer the question correctly to proceed to the next section. You’ll learn:

  • The what how and why of container images
  • How containers relate to applications
  • Stateless applications
    • Short term apps that do not retain data regarding a transaction - (e.g. print services, microservices)
  • Stateful applications
    • Applications that typically use a database (e.g. MySQL) and process a read/write and thus retain information regarding each transaction involved
  • Options for running applications locally/remotely/other
  • Tools to help you build an application
  • What’s involved in managing manifests

Section 2 — Hands-on Commands - Build an application

This section will cover Kubernetes keyboard commands needed to set up and scale an application in Kubernetes. Specific commands covered include:

  • Discovering K8s storage
    • Kubectl get storage class
  • Choosing a data  service- MySql (stateful data services and volume focus)
    • Applying  use case (PetClinic) for MySql
  • Installing the app
  • Exploring the app
  • Using it as a service to expose the app
  • Running multiple instances of the app
  • Scaling your app
  • Performing a rolling update
  • Adding data
  • Exploring persistent volume/ volume claim

In the more advanced section of the hands-on portion, you’ll learn how to install Kubestr,  an open source collection of tools to discover, validate and evaluate your Kubernetes storage options. Kubestr can:

  • Identify various storage options present in a cluster
  • Validate if storage options are configured correctly
  • Evaluate storage using common benchmarking tools such as FIO

Here’s a summary of the steps we’ll take as we install Kubester during the lab:

1) Install Kubestr

  • Ensure that the Kubernetes context is set and the cluster is accessible through your terminal. (Does kubectl work?)
  • Download the latest release here.
  • Unpack the tool and make it an executable chmod +x kubestr.

2) Discover available storage options:

  • Run ./kubestr

3) Run an FIO test:

  • Run ./kubestr fio -s <storage class>
  • Additional options like —size and —fiofile can be specified.
  • For more information visit our fio page.

4) Check a CSI drivers snapshot and restore capabilities:

  • Run ./kubestr csicheck -s <storage class> -v <volume snapshot class>

5) Install another storage class and use Kubestr to compare the two (GCP storage classes).

6) Link to the Application Transformation lab later to produce a sequence/template.

How do I access Lab 2?

Go to Learning.Kasten.io to start your learning journey! Remember: you can pause during the lab and return to the same spot without losing your place.

All the best, enjoy!

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