Your App Is Alive

Health Checks In Kubernetes

Created by Michelle Noorali @michellenoorali

What?

What does it look like?

In general

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In Kubernetes Land...

Introducing Puffy

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Share Puffy with the world!

• Write a manfiest (Kubernetes definition in a yaml file)
• Reference Docker image in Manifest
• Use Kubectl (cli tool) to manage/inspect cluster
• Prerequisites
  • Running Kubernetes Cluster on Google Container Engine (GCE)
  • Docker image of app stored on DockerHub
    • DockerHub = image registry = place to store images
    • Other image registries: Quay.io & Google Container Registry (GCR)

Puffy Repo

Dockerfile

Makefile

Pod Manifest File

Demo

Puffy is Alive

Let's make sure Puffy is OK.

Two Probes walk into a coffeeshop...

Wait. What is this probe thing?

Back to the probes...

Define a Liveness Probe in the Pod Manifest

Apply the changes in the Pod Manifest to the cluster

FAIL

Oops

Add /healthz

Bring Puffy Back!

Now for something more interesting...

More complex set up. App with data store that also calls to an external service.

Puffy's Career Change

Breaking news! Puffy has joined a boy band called Many Directions.

Puffy's world.

• Puffy is a go web app
• Relies on seatgeek for information on where One Direction (the competition) is performing
• On startup, Puffy pulls in all of One Direction's latest album songs to perform

Many Directions Repo

Manifests with a Readiness Probe

Demo Many Directions

Summary!

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Themes

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Reveal.configure({ backgroundTransition: 'zoom' })

Background Transitions

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<section data-background-transition="zoom">

Pretty Code

function linkify( selector ) {
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Marvelous List

• No order here
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Fantastic Ordered List

Tabular Tables

Clever Quotes

These guys come in two forms, inline: “The nice thing about standards is that there are so many to choose from” and block:

Intergalactic Interconnections

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Speaker View

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Press the S key to try it out.

Export to PDF

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Global State

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State Events

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Take a Moment

Press B or . on your keyboard to pause the presentation. This is helpful when you're on stage and want to take distracting slides off the screen.

Much more

• Right-to-left support
• Extensive JavaScript API
• Auto-progression
• Parallax backgrounds
• Custom keyboard bindings

THE END

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