book

Knative in Action

Name: Knative in Action
Author: Jacques Chester
ISBN: 9781617296642

by Jacques Chester

March 2021

Intermediate to advanced

272 pages

7h 48m

English

Manning Publications

Audiobook available

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inside front cover
Knative in Action
Copyright
dedication
contents
front matter
forewordprefaceacknowledgementsabout this bookWho should read this book?How this book is organized: A roadmapAbout the codeliveBook discussion forumOther online resourcesabout the authorabout the cover illustration
1 Introduction
1.1 What is Knative?1.1.1 Deploying, upgrading, and routing1.1.2 Autoscaling1.1.3 Eventing1.2 So what?1.3 Where Knative shines1.3.1 Workloads with unpredictable, latency-insensitive demand1.3.2 Stitching together events from multiple sources1.3.3 Decomposing monoliths in small increments1.4 It’s a hit1.4.1 Trouble in paradise1.5 Changing things1.6 What’s in the Knative box?1.6.1 Serving1.6.2 Eventing1.6.3 Serving and Eventing1.7 Keeping things under control1.7.1 Loops1.7.2 Loops within loops1.8 Are you ready?SummaryReferences
2 Introducing Knative Serving
2.1 A walkthrough2.1.1 Your first deployment2.1.2 Your second deployment2.1.3 Conditions2.1.4 What does Active mean?2.1.5 Changing the image2.1.6 Splitting traffic2.2 Serving components2.2.1 The controller and reconcilers2.2.2 The Webhook2.2.3 Networking controllers2.2.4 Autoscaler, Activator, and Queue-ProxySummaryReferences
3 Configurations and Revisions
3.1 Those who cannot remember the past are condemned to redeploy it3.2 The bedtime story version of the history of deployment as a concept3.2.1 The Blue/Green deployment3.2.2 The Canary deployment3.2.3 Progressive deployment3.2.4 Back to the future3.3 The anatomy of Configurations3.3.1 Configuration status3.3.2 Taking it all in with kubectl describe3.4 The anatomy of Revisions3.4.1 Revision basics3.4.2 Container basics3.4.3 Container images3.4.4 The command3.4.5 The environment, directly3.4.6 The environment, indirectly3.4.7 Configuration via files3.4.8 Probes3.4.9 Setting consumption limits3.4.10 Container concurrency3.4.11 Timeout secondsSummaryReferences
4 Routes
4.1 Using kn to work with Routes4.2 The anatomy of Routes4.3 The anatomy of TrafficTargets4.3.1 configurationName and revisionName4.3.2 latestRevision4.3.3 tagSummary

5 Autoscaling
5.1 The autoscaling problem5.2 Autoscaling when there are zero instances5.2.1 The Autoscaler panics5.3 Autoscaling when there are one or a few instances5.4 Autoscaling when there are many instances5.5 A little theory5.5.1 Control5.5.2 Queueing5.6 The actual calculation5.6.1 To panic, or not to panic, that is the question5.7 Configuring autoscaling5.7.1 How settings get applied5.7.2 Setting scaling limits5.7.3 Setting scaling rates5.7.4 Setting target values5.7.5 Setting decision intervals5.7.6 Setting window size5.7.7 Setting the panic threshold5.7.8 Setting the target burst capacity5.7.9 Other autoscalers5.8 A cautionary noteSummaryReferences
6 Introduction to Eventing
6.1 The road to CloudEvents6.2 The anatomy of CloudEvents6.2.1 Required attributes6.2.2 Optional attributes6.2.3 Extension attributes6.3 A word about event formats and protocol bindings6.3.1 Structured content mode6.3.2 Binary content mode6.3.3 Batched content mode6.4 A walkthrough6.5 The basic architecture of Eventing6.5.1 Messaging6.5.2 Eventing6.5.3 Sources6.5.4 Flows6.5.5 Duck typesSummaryReferences
7 Sources and Sinks
7.1 Sources7.1.1 The anatomy of Sources7.1.2 Using kn to work with Sources7.2 The Sink7.3 The mysterious SinkBinding (and its sidekick, ContainerSource)7.3.1 Provisioning and binding are not the same7.4 Other SourcesSummaryReferences
8 Filtering and Flowing
8.1 The Broker8.2 Filters8.2.1 Filtering on custom attributes8.2.2 Nice things that Eventing adds for you8.3 Sequences8.3.1 A walkthrough8.4 The anatomy of Sequences8.4.1 Step8.4.2 Reply8.4.3 ChannelTemplate and Channels8.4.4 Mixing Sequences and filters8.5 Parallels8.5.1 A walkthrough8.6 Dealing with failures8.6.1 Retries and backoffs8.6.2 Dead letters8.6.3 The bad newsSummaryReferences
9 From Conception to Production
9.1 Turning your software into something runnable9.1.1 Always use digests9.1.2 Using Cloud Native Buildpacks (CNBs) and the pack tool9.2 Getting your software to somewhere it runs9.3 Knowing how your software is running9.3.1 Logs9.3.2 Metrics9.3.3 TracesSummaryReferences
appendix. Installing Knative for Development
A.1 Installing kubectl and knA.2 Installing Knative
index
inside back cover

Content preview from Knative in Action

3 Configurations and Revisions

This chapter covers

A brief history of deployments
The anatomy of Configurations
The anatomy of Revisions

My focus in this chapter is to provide a guided tour of Serving’s dynamic duo, Configuration and Revision. This separation into two concepts isn’t for the mere joy of complexity. To explain the motivation, I’ll first give a fictionalized account of the history of software deployment, starting somewhere in the late Triassic period up to the current, slightly more advanced era of Thought Leadership.

After the history lesson, I’ll start with Configurations. These are the main way you describe your software and your intentions to Knative Serving. The coverage of Configurations is necessarily brief because Configurations ...

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Knative in Action

by Jacques Chester

3 Configurations and Revisions

Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.