Knative in Action

Knative in Action
brief contents
contents
foreword
preface
acknowledgements
about this book
	Who should read this book?
	How this book is organized: A roadmap
	About the code
	liveBook discussion forum
	Other online resources
about the author
about the cover illustration
1 Introduction
	1.1 What is Knative?
		1.1.1 Deploying, upgrading, and routing
		1.1.2 Autoscaling
		1.1.3 Eventing
	1.2 So what?
	1.3 Where Knative shines
		1.3.1 Workloads with unpredictable, latency-insensitive demand
		1.3.2 Stitching together events from multiple sources
		1.3.3 Decomposing monoliths in small increments
	1.4 It’s a hit
		1.4.1 Trouble in paradise
	1.5 Changing things
	1.6 What’s in the Knative box?
		1.6.1 Serving
		1.6.2 Eventing
		1.6.3 Serving and Eventing
	1.7 Keeping things under control
		1.7.1 Loops
		1.7.2 Loops within loops
	1.8 Are you ready?
	Summary
	References
2 Introducing Knative Serving
	2.1 A walkthrough
		2.1.1 Your first deployment
		2.1.2 Your second deployment
		2.1.3 Conditions
		2.1.4 What does Active mean?
		2.1.5 Changing the image
		2.1.6 Splitting traffic
	2.2 Serving components
		2.2.1 The controller and reconcilers
		2.2.2 The Webhook
		2.2.3 Networking controllers
		2.2.4 Autoscaler, Activator, and Queue-Proxy
	Summary
	References
3 Configurations and Revisions
	3.1 Those who cannot remember the past are condemned to redeploy it
	3.2 The bedtime story version of the history of deployment as a concept
		3.2.1 The Blue/Green deployment
		3.2.2 The Canary deployment
		3.2.3 Progressive deployment
		3.2.4 Back to the future
	3.3 The anatomy of Configurations
		3.3.1 Configuration status
		3.3.2 Taking it all in with kubectl describe
	3.4 The anatomy of Revisions
		3.4.1 Revision basics
		3.4.2 Container basics
		3.4.3 Container images
		3.4.4 The command
		3.4.5 The environment, directly
		3.4.6 The environment, indirectly
		3.4.7 Configuration via files
		3.4.8 Probes
		3.4.9 Setting consumption limits
		3.4.10 Container concurrency
		3.4.11 Timeout seconds
	Summary
	References
4 Routes
	4.1 Using kn to work with Routes
	4.2 The anatomy of Routes
	4.3 The anatomy of TrafficTargets
		4.3.1 configurationName and revisionName
		4.3.2 latestRevision
		4.3.3 tag
	Summary
5 Autoscaling
	5.1 The autoscaling problem
	5.2 Autoscaling when there are zero instances
		5.2.1 The Autoscaler panics
	5.3 Autoscaling when there are one or a few instances
	5.4 Autoscaling when there are many instances
	5.5 A little theory
		5.5.1 Control
		5.5.2 Queueing
	5.6 The actual calculation
		5.6.1 To panic, or not to panic, that is the question
	5.7 Configuring autoscaling
		5.7.1 How settings get applied
		5.7.2 Setting scaling limits
		5.7.3 Setting scaling rates
		5.7.4 Setting target values
		5.7.5 Setting decision intervals
		5.7.6 Setting window size
		5.7.7 Setting the panic threshold
		5.7.8 Setting the target burst capacity
		5.7.9 Other autoscalers
	5.8 A cautionary note
	Summary
	References
6 Introduction to Eventing
	6.1 The road to CloudEvents
	6.2 The anatomy of CloudEvents
		6.2.1 Required attributes
		6.2.2 Optional attributes
		6.2.3 Extension attributes
	6.3 A word about event formats and protocol bindings
		6.3.1 Structured content mode
		6.3.2 Binary content mode
		6.3.3 Batched content mode
	6.4 A walkthrough
	6.5 The basic architecture of Eventing
		6.5.1 Messaging
		6.5.2 Eventing
		6.5.3 Sources
		6.5.4 Flows
		6.5.5 Duck types
	Summary
	References
7 Sources and Sinks
	7.1 Sources
		7.1.1 The anatomy of Sources
		7.1.2 Using kn to work with Sources
	7.2 The Sink
	7.3 The mysterious SinkBinding (and its sidekick, ContainerSource)
		7.3.1 Provisioning and binding are not the same
	7.4 Other Sources
	Summary
	References
8 Filtering and Flowing
	8.1 The Broker
	8.2 Filters
		8.2.1 Filtering on custom attributes
		8.2.2 Nice things that Eventing adds for you
	8.3 Sequences
		8.3.1 A walkthrough
	8.4 The anatomy of Sequences
		8.4.1 Step
		8.4.2 Reply
		8.4.3 ChannelTemplate and Channels
		8.4.4 Mixing Sequences and filters
	8.5 Parallels
		8.5.1 A walkthrough
	8.6 Dealing with failures
		8.6.1 Retries and backoffs
		8.6.2 Dead letters
		8.6.3 The bad news
	Summary
	References
9 From Conception to Production
	9.1 Turning your software into something runnable
		9.1.1 Always use digests
		9.1.2 Using Cloud Native Buildpacks (CNBs) and the pack tool
	9.2 Getting your software to somewhere it runs
	9.3 Knowing how your software is running
		9.3.1 Logs
		9.3.2 Metrics
		9.3.3 Traces
	Summary
	References
Appendix—Installing Knative for Development
	A.1 Installing kubectl and kn
	A.2 Installing Knative
index
	Numerics
	A
	B
	C
	D
	E
	F
	G
	H
	I
	J
	K
	L
	M
	N
	O
	P
	Q
	R
	S
	T
	U
	V
	W
	Y