When you build a serverless app, you either tie yourself to a cloud provider, or you end up building your own serverless stack. Knative provides a better choice. Knative extends Kubernetes to provide a set of middleware components (build, serving, events) for modern, source-centric, and container-based apps that can run anywhere. In this talk, we’ll see how we can use Knative primitives to build a serverless app that utilizes the Machine Learning magic of the cloud.

1. Serverless with Knative
Mete Atamel
Developer Advocate at Google
@meteatamel
github.com/meteatamel/knative-tutorial

2. Confidential & Proprietary
bit.ly/knative-survey

3. Introduction to Knative

4. Confidential & Proprietary
What is Knative?
Kubernetes based
open source building
blocks for serverless

5. Confidential & Proprietary
Ideal Serverless
No servers Idiomatic Event-driven Portable

6. Confidential & Proprietary
Kubernetes
Service
Pods
Each pod containers
one or more containers
Nodes
Role: frontend
Role: frontend Role: frontend Role: frontend
Replication
controller
Replicas: 3
Env: prod
microservice
labels
Service
communication
channel
Blueprint
“pod
template”
Env: prod Env: prod Env: prod registry
containers

7. Confidential & Proprietary
Developers want serverless
... just want to run their code.
... want to use their favorite
languages and dependencies.
... don't want to manage the
infrastructure.
Operators want Kubernetes
Kubernetes is great orchestrating
microservices
They love using GKE and not having to
do operations for Kubernetes.
Kubernetes is not the right abstraction
for their developers.

8. Confidential & Proprietary
Knative Project - github.com/knative
Set of components (serving, eventing, build)
Ingredients for Serverless
Solves for modern development patterns
Implements learnings from Google, partners

9. Knative stack
Build Serving
KubernetesPlatform
Products
Primitives Events ...
Serverless Containers on GCF GKE Serverless Add-on SAP Kyma
Pivotal Function Service IBM Cloud Functions Red Hat Cloud Functions
Pivotal riff OpenFaaS T-mobile Jazz
IstioService Mesh

10. Confidential & Proprietary
Knative Stack
Build Serving
KubernetesPlatform
Products
Primitives Events ...
Serverless Containers on GCF GKE Serverless Add-on SAP Kyma
Pivotal Function Service IBM Cloud Functions Red Hat Cloud Functions
Pivotal riff OpenFaaS T-mobile Jazz
IstioService Mesh
# Get a Kubernetes Cluster
$ gcloud container clusters create hello-knative
--cluster-version=latest
--num-nodes=3
--zone europe-west1-b
--scopes=service-control,service-management,compute-rw,storage-ro,cloud-platform,l
ogging-write,monitoring-write,pubsub,datastore
Creating cluster hello-knative...done.
NAME LOCATION MASTER_VERSION MASTER_IP MACHINE_TYPE NODE_VERSION NUM_NODES STATUS
Hello-knative europe-west1-b 1.10.7-gke.6 35.190.192.251 n1-standard-1 1.10.7-gke.6 4 RUNNING
# Create Cluster Role Binding
$ kubectl create clusterrolebinding cluster-admin-binding
--clusterrole=cluster-admin
--user=$(gcloud config get-value core/account)
clusterrolebinding "cluster-admin-binding" created

11. Confidential & Proprietary
Knative Stack
Build Serving
KubernetesPlatform
Products
Primitives Events ...
Serverless Containers on GCF GKE Serverless Add-on SAP Kyma
Pivotal Function Service IBM Cloud Functions Red Hat Cloud Functions
Pivotal riff OpenFaaS T-mobile Jazz
IstioService Mesh
# Install Istio
$ kubectl apply
-f https://github.com/knative/serving/releases/download/v0.3.0/istio-crds.yaml &&
kubectl apply
-f https://github.com/knative/serving/releases/download/v0.3.0/istio.yaml
# Install Knative Serving, Build, Eventing
$ kubectl apply
-f https://github.com/knative/serving/releases/download/v0.3.0/serving.yaml
-f https://github.com/knative/build/releases/download/v0.3.0/release.yaml
-f https://github.com/knative/eventing/releases/download/v0.3.0/release.yaml
-f https://github.com/knative/eventing-sources/releases/download/v0.3.0/release.yaml
-f https://github.com/knative/serving/releases/download/v0.3.0/monitoring.yaml

12. Knative Serving

13. Confidential & Proprietary
Knative Serving
What is it?
Rapid deployment and autoscaling
of serverless containers.
Seamlessly scale up and down
Built-in traffic splitting between
revisions
Integrates networking and service
mesh automatically
Pluggable
Connect to your own logging
and monitoring platform, or use
the built-in system
Auto-scaler can be tuned or
swapped out for custom code

14. Confidential & Proprietary
Knative Serving Primitives
Knative Service
High level abstraction for the application
Configuration
Current/desired state of an application
Code & configuration separated (a la 12-factor)
Revision
Point in time snapshots for your code and configuration
Route
Maps traffic to revisions

15. Knative Eventing

16. Confidential & Proprietary
Knative Eventing
What is it?
For loosely coupled, event-driven
services
Declaratively bind between event
producers and Knative services
Scales from just few events to live
streams
Custom event pipelines to connect
with your own existing systems
Event type
Flow
Event
source
Event type
Event type
Event
consumer(s)
KubernetesEventSource
GitHubSource
GcpPubSubSource
AwsSqsSource
ContainerSource
CronJobSource

17. Confidential & Proprietary
Knative Eventing

18. Confidential & Proprietary
Integrate Cloud Storage to Vision API
Cloud Storage
Bucket
Cloud Storage -> Cloud PubSub -> Knative Eventing -> Knative Servicing -> Vision API
Cloud PubSub
Topic
Knative Eventing
Channel
Knative Serving
GKE
Cloud Vision API
Labels

19. Knative Build

20. Confidential & Proprietary
Knative Build
What is it?
Go from source code to container
images on repositories
Build pipelines can have multiple
steps and can push to different
registries
Builds run in containers in the
cluster. No need for Docker locally
Primitives
Build: Represents an in-cluster
build job with 1 or more steps
BuildTemplate: A set of ordered
and parameterized build steps.
Builder: A container in a Build
step that performs an action
(eg. build)
ServiceAccount: For
authentication with DockerHub
etc.

21. Confidential & Proprietary
Thank you!
@meteatamel
github.com/meteatamel/knative-tutorial
github.com/knative
cloud.google.com/knative