Beyond Kubernetes - Knative, riff, and Spring Cloud Function

Beyond Kubernetes Managing Applications and Functions with Knative, riff, and
Spring Cloud Functions Eric Bottard @ebottard Pivotal Ray Tsang @saturnism Google

@saturnism @gcpcloud / @ebottard @pivotal / @projectriff @knativeproject @kubernetesio Ray
Tsang Developer Advocate Google Cloud Platform Spring Cloud GCP cloud.spring.io/spring-cloud-gcp/ JHipster, JDeferred Java Champion @saturnism | saturnism.me

@saturnism @gcpcloud / @ebottard @pivotal / @projectriff @knativeproject @kubernetesio Eric
Bottard Sr Software Engineer Pivotal Spring Cloud DataFlow cloud.spring.io/spring-cloud-dataflow/ Project riff https://projectriff.io/ @ebottard

@saturnism @gcpcloud / @ebottard @pivotal / @projectriff @knativeproject @kubernetesio Kubernetes
- Looking under the hood Knative - Why and How riff - A FaaS on top of Knative Serving - via a manual deployment Build - via riff function create Eventing - via riff function chaining Spring Cloud Function - platform agnostic functions End to End - everything we've learned Things We'll Cover

@saturnism @gcpcloud / @ebottard @pivotal / @projectriff @knativeproject @kubernetesio apiVersion:
app/v1 kind: Deployment metadata: name: helloworld ... spec: replicas: 2 template: ... spec: containers: - name: helloworld image: saturnism/helloworld:v1

@saturnism @gcpcloud / @ebottard @pivotal / @projectriff @knativeproject @kubernetesio web
browsers Scheduler kubectl web browsers scheduler Kubelet Kubelet Kubelet Kubelet Config file Kubernetes Master Container Image

@saturnism @gcpcloud / @ebottard @pivotal / @projectriff @knativeproject @kubernetesio Let's
See It

@saturnism @gcpcloud / @ebottard @pivotal / @projectriff @knativeproject @kubernetesio Deployment

@saturnism @gcpcloud / @ebottard @pivotal / @projectriff @knativeproject @kubernetesio ReplicaSet
Deployment

@saturnism @gcpcloud / @ebottard @pivotal / @projectriff @knativeproject @kubernetesio Pod
ReplicaSet Deployment Pod

apiVersion: app/v1 kind: Deployment metdatdata: name: nginx spec: replicas: 2 template: ... spec: containers: - name: nginx image: nginx

Deployment Controller apiVersion: app/v1 kind: Deployment metdatdata: name: nginx spec: replicas: 2 template: ... spec: containers: - name: nginx image: nginx

Deployment Deployment Controller Create apiVersion: app/v1 kind: ReplicaSet metadata: name: nginx-1234 spec: replicas: 2 template: ... spec: containers: - name: nginx image: nginx

Deployment Deployment Controller Replication Controller Create apiVersion: app/v1 kind: ReplicaSet metadata: name: nginx-1234 spec: replicas: 2 template: ... spec: containers: - name: nginx image: nginx

ReplicaSet Deployment Deployment Controller apiVersion: app/v1 kind: Pod metadata: name: nginx-1234-k5jv spec: ... containers: - name: nginx image: nginx Replication Controller Create Create Pod apiVersion: app/v1 kind: Pod metadata: name: nginx-1234-q7jd spec: ... containers: - name: nginx image: nginx

ReplicaSet Deployment Deployment Controller Replication Controller Create Create Scheduler Pod apiVersion: app/v1 kind: Pod metadata: name: nginx-1234-k5jv spec: ... containers: - name: nginx image: nginx apiVersion: app/v1 kind: Pod metadata: name: nginx-1234-q7jd spec: ... containers: - name: nginx image: nginx

ReplicaSet Deployment Deployment Controller Replication Controller Create Create Scheduler Assign to Node Pod apiVersion: app/v1 kind: Pod metadata: name: nginx-1234-k5jv spec: ... containers: - name: nginx image: nginx nodeName: node-1 apiVersion: app/v1 kind: Pod metadata: name: nginx-1234-q7jd spec: ... containers: - name: nginx image: nginx nodeName: node-2

ReplicaSet Deployment Deployment Controller Replication Controller Create Create Scheduler Assign to Node Pod Kubelet apiVersion: app/v1 kind: Pod metadata: name: nginx-1234-k5jv spec: ... containers: - name: nginx image: nginx nodeName: node-1 apiVersion: app/v1 kind: Pod metadata: name: nginx-1234-q7jd spec: ... containers: - name: nginx image: nginx nodeName: node-2

ReplicaSet Deployment Deployment Controller Replication Controller Create Create Scheduler Assign to Node Pod Kubelet Start the container! apiVersion: app/v1 kind: Pod metadata: name: nginx-1234-k5jv spec: ... containers: - name: nginx image: nginx nodeName: node-1 status: ... apiVersion: app/v1 kind: Pod metadata: name: nginx-1234-q7jd spec: ... containers: - name: nginx image: nginx nodeName: node-2 status: ...

ReplicaSet Deployment Deployment Controller Replication Controller Create Create Scheduler Assign to Node Pod Kubelet Update Status Start the container! apiVersion: app/v1 kind: Pod metadata: name: nginx-1234-k5jv spec: ... containers: - name: nginx image: nginx nodeName: node-1 status: ... apiVersion: app/v1 kind: Pod metadata: name: nginx-1234-q7jd spec: ... containers: - name: nginx image: nginx nodeName: node-2 status: ...

ReplicaSet Deployment Pod

@saturnism @gcpcloud / @ebottard @pivotal / @projectriff @knativeproject @kubernetesio You
can write your own Resource & Controller!

apiextensions.k8s.io/v1beta1 kind: CustomResourceDefinition metadata: name: gameservers.stable.agones.dev spec: group: stable.agones.dev version: v1alpha1 scope: Namespaced names: kind: GameServer plural: gameservers shortNames: - gs singular: gameserver Custom Resource Definition https://github.com/GoogleCloudPlatform/agones

apiextensions.k8s.io/v1beta1 kind: CustomResourceDefinition metadata: name: gameservers.stable.agones.dev spec: group: stable.agones.dev version: v1alpha1 scope: Namespaced names: kind: GameServer plural: gameservers shortNames: - gs singular: gameserver Custom Resource Definition apiVersion: apiextensions.k8s.io/v1beta1 kind: CustomResourceDefinition metadata: name: gameservers.stable.agones.dev spec: group: stable.agones.dev version: v1alpha1 scope: Namespaced names: ... validation: openAPIV3Schema: required: - spec properties: spec: required: - template ... With Validation

"stable.agones.dev/v1alpha1" kind: GameServer metadata: name: "simple-udp" spec: ports: - name: default portPolicy: "dynamic" containerPort: 7654 template: spec: containers: - name: simple-udp image: gcr.io/agones-images/udp-server:0.4 Custom Resource

"stable.agones.dev/v1alpha1" kind: GameServer metadata: name: "simple-udp" spec: ports: - name: default portPolicy: "dynamic" containerPort: 7654 template: spec: containers: - name: simple-udp image: gcr.io/agones-images/udp-server:0.4 Custom Resource Controller Game Server Controller

"stable.agones.dev/v1alpha1" kind: GameServer metadata: name: "simple-udp" spec: ports: - name: default portPolicy: "dynamic" containerPort: 7654 template: spec: containers: - name: simple-udp image: gcr.io/agones-images/udp-server:0.4 Custom Resource Controller Game Server Controller Deployment Create

"stable.agones.dev/v1alpha1" kind: GameServer metadata: name: "simple-udp" spec: ports: - name: default portPolicy: "dynamic" containerPort: 7654 template: spec: containers: - name: simple-udp image: gcr.io/agones-images/udp-server:0.4 Custom Resource Controller Game Server Controller ReplicaSet Deployment Create

"stable.agones.dev/v1alpha1" kind: GameServer metadata: name: "simple-udp" spec: ports: - name: default portPolicy: "dynamic" containerPort: 7654 template: spec: containers: - name: simple-udp image: gcr.io/agones-images/udp-server:0.4 Custom Resource Controller Game Server Controller Pod ReplicaSet Deployment Pod Create

@saturnism @gcpcloud / @ebottard @pivotal / @projectriff @knativeproject @kubernetesio Knative

@saturnism @gcpcloud / @ebottard @pivotal / @projectriff @knativeproject @kubernetesio Zero
to Kubernetes Kubernetes Write code Build docker image Upload image to registry Deploy with Deployment Expose to the internet HTTP Load Balancing Scale workload

@saturnism @gcpcloud / @ebottard @pivotal / @projectriff @knativeproject @kubernetesio Higher
Level Abstraction Kubernetes Write code Build docker image Upload image to registry Deploy with Deployment Expose to the internet HTTP Load Balancing Scale workload Would Be Nice... Write code :D Deploy!

@saturnism @gcpcloud / @ebottard @pivotal / @projectriff @knativeproject @kubernetesio Building
higher level abstraction

@saturnism @gcpcloud / @ebottard @pivotal / @projectriff @knativeproject @kubernetesio Introducing
Knative Kubernetes-based building blocks for serverless workloads

@saturnism @gcpcloud / @ebottard @pivotal / @projectriff @knativeproject @kubernetesio •
Set of primitives (Build, Events, Serving) • Solves for modern development patterns • Implements learnings from Google, partners • Ingredient or platform for OSS FaaS frameworks github.com/knative Introducing Knative Kubernetes-based building blocks for serverless workloads

@saturnism @gcpcloud / @ebottard @pivotal / @projectriff @knativeproject @kubernetesio The
Knative stack Kubernetes Platform

Knative stack Kubernetes Platform Istio Service Mesh

Knative stack Kubernetes Platform Istio Service Mesh Build Primitives Serving Events

is ... native

@saturnism @gcpcloud / @ebottard @pivotal / @projectriff @knativeproject @kubernetesio riff

@saturnism @gcpcloud / @ebottard @pivotal / @projectriff @knativeproject @kubernetesio Event
driven Function as a Service Opinionated experience built atop Knative, Kubernetes and Istio Functions practice Inversion of Control No servers, ports or HTTP, just your logic Pick your language runtime: Java/Spring JavaScript/Node executable commands more from the community riff is for functions

on Knative Community-driven ecosystem of Sources, Channels, Functions, Invokers, BuildTemplates, etc. Kubernetes BuildTemplates Channels CLI Invokers CLI Invokers Build Topics

@saturnism @gcpcloud / @ebottard @pivotal / @projectriff @knativeproject @kubernetesio Target
Audience(s)

Serving

Knative Serving project provides middleware primitives that enable: Automatic scaling up and down to zero Routing and network programming for Istio components Point-in-time snapshots of deployed code and configurations Knative Serving

Serving defines principled objects Knative defines primitives with clear separation of concerns So far, we used Service, a lite version of Knative objects spec: container: image: gcr.io/knative-samples/simple-app:latest env: - name: SIMPLE_MSG value: "Hello GCP Next 2018!" Service

Serving defines principled objects Knative defines primitives with clear separation of concerns Configuration Current/desired state for your application Code & configuration (separated, ala 12 factor) Configuration Service

Serving defines principled objects Knative defines primitives with clear separation of concerns Configuration Current/desired state for your application Code & configuration (separated, ala 12 factor) Revision Point in time snapshots for your code and configuration Revision Configuration Service

Serving defines principled objects Revision Knative defines primitives with clear separation of concerns Configuration Current/desired state for your application Code & configuration (separated, ala 12 factor) Revision Point in time snapshots for your code and configuration Route Maps traffic to a revisions Supports fractional, named routing Route Configuration Service

@saturnism @gcpcloud / @ebottard @pivotal / @projectriff @knativeproject @kubernetesio Revision
Route Configuration Knative Service

Route Configuration Knative Service Deployment Kubernetes Service

Route Configuration Knative Service ReplicaSet Deployment Kubernetes Service

Route Configuration Knative Service Pod ReplicaSet Deployment Pod Kubernetes Service

Route Configuration Knative Service Pod ReplicaSet Deployment Pod Istio Virtual Service Kubernetes Service

@saturnism @gcpcloud / @ebottard @pivotal / @projectriff @knativeproject @kubernetesio ServiceCRD
- creates route and configuration, for either latest or pinned revision RouteCRD - maps a network endpoint to one or more revisions, enabling traffic policy management across revisions ConfigurationCRD - mutable desired state for your deployment, with each modification creating a new revision RevisionCRD - immutable point-in-time snapshot for each modification made to the workload code/config Knative Serving CRDs

@saturnism @gcpcloud / @ebottard @pivotal / @projectriff @knativeproject @kubernetesio Demo:
Deploying and updating live service Blue-green deployment model Route 100% Revision 0001 Configuration kind: Route ... spec: traffic: - revisionName: blue-green-00001 percent: 100

@saturnism @gcpcloud / @ebottard @pivotal / @projectriff @knativeproject @kubernetesio Blue-green
deployment model kind: Route ... spec: traffic: - revisionName: blue-green-00001 percent: 100 - revisionName: blue-green-00002 percent: 0 name: v2 Deploy updated version of the service • Blue continues to take 100% of traffic • Named route (v2) to green version Revision 00002 Route 100% Revision 00001 0% v2 Configuration Configuration

deployment model Update service configuration • Send % of traffic to green • Still have explicit v2 route kind: Route ... spec: traffic: - revisionName: blue-green-00001 percent: 50 - revisionName: blue-green-00002 percent: 50 name: v2 Revision 00002 Route 98% Revision 00001 2% (Experiment) Configuration Configuration

deployment model Update service configuration • Incrementally add %, until all traffic is on green • Keep explicit named route to blue Secured with RBAC-based ACL kind: Route ... spec: traffic: - revisionName: blue-green-00001 percent: 0 name: v1 - revisionName: blue-green-00002 percent: 100 Revision 00002 Route 0% v1 Revision 00001 100% Configuration Configuration

Build

@saturnism @gcpcloud / @ebottard @pivotal / @projectriff @knativeproject @kubernetesio A
Build is a custom resource in Knative that allows you to define a process that runs to completion and can provide status. For example, fetch, build, and package your code by using a Knative Build that communicates whether the process succeeds. A Knative Build runs on-cluster [...] to build the source code of your apps into container images, which you can then run on Knative serving. Knative Build https://github.com/knative/docs/tree/master/build

@saturnism @gcpcloud / @ebottard @pivotal / @projectriff @knativeproject @kubernetesio a
BuildCRD = specific instance of a process made of steps runs a sequence of images, aka Builders a BuildTemplateCRD = a recipe for instantiating BuildsCRD. accepts parameters runs under a given ServiceAccount can hold credentials Key Concepts of Knative Build

Build - Plenty to Choose From

@saturnism @gcpcloud / @ebottard @pivotal / @projectriff @knativeproject @kubernetesio DEMO

@saturnism @gcpcloud / @ebottard @pivotal / @projectriff @knativeproject @kubernetesio Square.js
module.exports = x => x ** 2;

@saturnism @gcpcloud / @ebottard @pivotal / @projectriff @knativeproject @kubernetesio W
A I T ⏯ ⏪

Eventing

Events is a system which is designed to address a common need for cloud native development: 1. Services are loosely coupled during development and deployed independently on a variety of platforms (Kubernetes, VMs, SaaS or FaaS). 2. A producer can generate events before a consumer is listening, and a consumer can express an interest in an event or class of events that is not yet being produced. 3. Services can be connected to create new applications without modifying producer or consumer. With the ability to select a specific subset of events from a particular producer Knative Eventing https://github.com/knative/docs/tree/master/eventing

@saturnism @gcpcloud / @ebottard @pivotal / @projectriff @knativeproject @kubernetesio ChannelCRD
is a network endpoint which receives (and optionally persists) events using a Bus-specific implementation. SubscriptionCRD connects events received on a Channel to an interested target, represented as a DNS name. There may be multiple Subscriptions on a single channel. Bus* defines the adaptation layers needed to implement channels and subscriptions using a specific persistence strategy (such as delivery of events to a Kafka topic). Knative Eventing Also: Sources, Flows source channel function flow subscription

Loosely Coupled Example square

Loosely Coupled Example square correlator riff service create correlator --image projectriff/correlator:fats

Loosely Coupled Example numbers square correlator riff channel create numbers --cluster-bus stub

Loosely Coupled Example numbers square correlator squares riff channel create squares --cluster-bus stub

subscription create --channel numbers --subscriber square --reply-to squares A Loosely Coupled Example numbers square correlator squares

Loosely Coupled Example numbers square greet correlator squares riff function create command greet \ --image gcr.io/$GCP_PROJECT/riff-sample-greet \ --git-repo https://github.com/projectriff-samples/command-hello \ --artifact greet.sh \ --verbose

Loosely Coupled Example numbers square replies greet correlator squares riff channel create replies --cluster-bus stub

subscription create -c squares -s greet -r replies A Loosely Coupled Example numbers square replies greet correlator squares

subscription create -c replies -s correlator A Loosely Coupled Example numbers square replies greet correlator squares

Loosely Coupled Example numbers square replies greet correlator squares /numbers

@saturnism @gcpcloud / @ebottard @pivotal / @projectriff @knativeproject @kubernetesio DEMO

is extensible Knative is a platform for platforms Serving scale to/from zero. Route traffic Build optionally build from source Eventing decouple workloads in space / time riff is a FaaS on top of Knative Let's Recap

@saturnism @gcpcloud / @ebottard @pivotal / @projectriff @knativeproject @kubernetesio Spring
Cloud Function

@saturnism @gcpcloud / @ebottard @pivotal / @projectriff @knativeproject @kubernetesio Working
with Spring Cloud Function Serverless Functions the Spring way • Promote the implementation of business logic via functions • Abstract away the target runtime ◦ Supports multiple Function as a Service platform • Support a uniform programming model across serverless providers ◦ Run standalone (locally or in a PaaS). • Enable Spring Boot features on serverless providers ◦ Auto-configuration ◦ Dependency injection ◦ Metrics

serverless function by itself is ... • kind of pointless ... we need a way to deploy it and to invoke it • include the function in an app • invoke it via a standalone invoker app • deploy it to a FaaS

function package com.springdeveloper.demo.functionapp; import java.util.function.Function; public class Upper implements Function<String, String> { public String apply(String name) { return name.toUpperCase(); } }

function invoker package com.springdeveloper.demo.functionapp; import java.util.function.Function; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.context.annotation.Bean; @SpringBootApplication public class FunctionAppApplication { @Bean public Function<String, String> uppercase() { return s -> s.toUpperCase(); } public static void main(String[] args) { SpringApplication.run(FunctionAppApplication.class, args); } }

@saturnism @gcpcloud / @ebottard @pivotal / @projectriff @knativeproject @kubernetesio Let's
build something...

@saturnism @gcpcloud / @ebottard @pivotal / @projectriff @knativeproject @kubernetesio Spring
Cloud GCP Goals Provide integration between GCP services and Spring Meet developers where they are Cut down on boilerplate code +

@saturnism @gcpcloud / @ebottard @pivotal / @projectriff @knativeproject @kubernetesio Feature
GCP Service Spring Framework Authentication Auto credential discovery. Service Accounts. Configuration Cloud Runtime Config Spring Cloud Config Messaging Cloud Pub/Sub Spring Integration Spring Cloud Stream Spring Dataflow Database Cloud SQL Cloud Spanner Spring Data Spring Data Spanner Storage Cloud Storage Spring Resource Logging Stackdriver Logging Logback Trace Stackdriver Trace Spring Cloud Sleuth

@saturnism @gcpcloud / @ebottard @pivotal / @projectriff @knativeproject @kubernetesio Vision
API • Analyze what's inside of an image • Feature detection such as ◦ labels (is there a cat?) ◦ text extraction ◦ facial features and emotion ◦ Landmarks ◦ Logos ◦ safe search ◦ ...

Basics Knative - Why and How riff - A FaaS on top of Knative Serving - via a manual deployment Build - via riff function create Eventing - via riff function chaining End to End - everything we've learned Things We Saw

@saturnism @gcpcloud / @ebottard @pivotal / @projectriff @knativeproject @kubernetesio Thanks!
Give it a try! Project riff projectriff.io Install, Samples, Docs github.com/knative/docs Spring Cloud Function, Knative, Riff Code Lab bit.ly/spring-riff-lab Want to contribute? knative/docs/community Have questions? knative.slack.com

Beyond Kubernetes - Knative, riff, and Spring C...

Beyond Kubernetes - Knative, riff, and Spring Cloud Function

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