This document provides an overview of service mesh and serverless technologies. It discusses the evolution of microservices and how service mesh addresses needs like service discovery, routing and monitoring. It introduces concepts like sidecars and shows the architecture of Istio service mesh. It then defines serverless computing and discusses how the Knative project implements a serverless platform on Kubernetes. It shows examples of using Knative to deploy serverless applications on OpenShift and highlights the roadmap for integrating technologies like Tekton.

1. Service Mesh
Serverless
Overview
OpenShift Meetup - Tokyo
October 18th, 2019
Maria Bracho
OpenShift Product Manager
@mariabracho
1

2. Service Mesh
2

3. 3
Distributed Architecture
Service ServiceService
Service ServiceService
Service ServiceService

4. 4
Microservices Evolution
Service
Config
Svc Discovery
Routing
Circuit Breaker
Tracing
Service
Platform
Container Platform
(+ Service Mesh)
...2014 2018

5. 5
● Two or more containers deployed to same pod
● Share
○ Same
■ Namespace
■ Pod IP
○ Shared lifecycle
● Used to enhance the co-located containers
● Istio Proxy (L7 Proxy)
○ Proxy all network traffic in and out of the app
container
Source: http://blog.kubernetes.io/2015/06/the-distributed-system-toolkit-patterns.html
Sidecars
POD
SERVICE A
Istio Proxy

6. Control Plane
6
POD
ENVOY
SERVICE
POD
ENVOY
SERVICE
POD
ENVOY
SERVICE
Pilot Mixer Auth
Service Mesh Architecture
Applies security, route rules,
policies and reports traffic
telemetry at the pod level
Jaeger
Data Plane

7. 7
Service Mesh Ecosystem
Observe Observe
Secure
ControlConnect
Jaeger
Kiali Grafana
Prometheus
Istio

8. 8
Enhanced Visualization of Cluster Traffic
With Kiali
Visualization of what
Matters most:
● Application Topology
● Traffic throughput
● Error Rates
● Service Latency
● Service Versioning

9. 9
Convenient Overviews of Individual Services

10. 10
Guided
Configuration of
Traffic Policies

11. 11
Distributed Services With
Red Hat Openshift Service Mesh
INFRA
INFRA OPS
SERVICE
OPS
SERVICE
ANY
INFRASTRUCTURE
OpenShift Container Platform
(Enterprise Kubernetes)
Amazon Web Services Microsoft Azure Google CloudOpenStackDatacenterLaptop
OpenShift Service Mesh
(Istio + Jaeger + Kiali)
ANY
APPLICATION
Service
CONTAINER
Service
CONTAINER
Service
CONTAINER
Service
CONTAINER
Service
CONTAINER

12. Key Features
● A dedicated network for service to service
communications
● Observability and distributed tracing
● Policy-driven security
● Routing rules & chaos engineering
● Powerful visualization & monitoring
● Will be available via OperatorHub
12
Generally Available
In OCP 4.2
OpenShift Service Mesh

13. Serverless
13

14. Serverless Defined
SERVERLESS
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“computing execution model that depends
on services to manage server-side logic
and state where business logic run in
stateless, event-triggered compute linux
containers"
event
action
result$

15. 15
"Function as a
Service (FaaS) is
serverless in the
same way a square
is a rectangle"
Serverless > Functions
Serverless > Microservices
Serverless > Containers
SERVERLESS MARKET

16. 16

17. CLOUD NATIVE DEVELOPMENT MARKET
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18. CLOUD NATIVE DEVELOPMENT MARKET
18

19. CLOUD NATIVE DEVELOPMENT MARKET
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20. Microservices, Functions and Apps + Events
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MicroservicesFunctions Apps
Containers
Infrastructure & Scheduling
Containers
Infrastructure & Scheduling
Events
Infrastructure

21. First Principles
MODERN APPLICATIONS
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Distributed
Secure
API Centric
Event Driven
Multi-cloud Scalable
Polyglot
Java
.Net
Core
Node.js
Python
Go
Lang
Disposable

22. Serverless & Knative
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23. Companies
contributing to Knative
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Source:
https://knative.teststats.cncf.io/d/8/dashboards?refresh=15m&orgId=1

24. What is Knative ?
OPENSHIFT SERVERLESS
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SERVING
An event-driven model that
serves the container with
your application and can
"scale to zero".
EVENTING
Common infrastructure for
consuming and producing
events that will stimulate
applications.

25. Community
Operators
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26. 26
Productized Operator

27. User Experience
CLI
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More details at https://github.com/knative/client/tree/master/docs
kn service create hello --image gcr.io/knative-samples/helloworld-go --env NAME=value
Service 'hello' successfully created in namespace 'default'.
kn service get hello
NAME DOMAIN GENERATION AGE CONDITIONS READY
REASON
hello hello.default.example.com 1 3m5s 3 OK / 3 True
Other commands available: update, replace, get, describe
Options: --limits-cpu 100m --limits-memory 1024m

28. NEXT WAVE OF DEVELOPER TOOLS
apiVersion: apps/v1
kind: Deployment
metadata:
name: frontend
labels:
app: guestbook
spec:
selector:
matchLabels:
app: guestbook
tier: frontend
replicas: 1
template:
metadata:
labels:
app: guestbook
tier: frontend
spec:
containers:
- image: markusthoemmes/guestbook
name: guestbook
resources:
requests:
cpu: 100m
memory: 100Mi
env:
- name: GET_HOSTS_FROM
value: dns
ports:
- containerPort: 80
apiVersion: serving.knative.dev/v1alpha1
kind: Service
metadata:
name: frontend
spec:
template:
metadata:
labels:
app: guestbook
tier: frontend
spec:
containers:
- image: markusthoemmes/guestbook
resources:
requests:
cpu: 100m
memory: 100Mi
env:
- name: GET_HOSTS_FROM
value: dns
ports:
- containerPort: 80
---
apiVersion: v1
kind: Service
metadata:
name: frontend-service
labels:
app: guestbook
tier: frontend
spec:
ports:
- port: 80
selector:
app: guestbook
tier: frontend
---
apiVersion: route.openshift.io/v1
kind: Route
metadata:
name: frontend-route
spec:
to:
kind: Service
name: frontend-service
Kubernetes Knative
22 lines53 lines
"Lift & Shift" to Serverless
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29. Knative v0.7.1 (v1alpha1)
Kafka event source
Installation docs
Metering
Logging & Monitoring
Developer Console (UI)
29
OpenShift Serverless
Roadmap
Sep 2019
Knative v0.7.0 (v1alpha)
Operators-based Install
Domain config & Ingress
CLI (kn) for Serving
Camel-K event source
Tech Preview 2
Feb 2020
Dev Preview 0.7
June 2019
General Availability
Knative v0.9.0 (v1beta1)
Tekton Integration (Pipelines)
VS Code Plugins
CLI (kn) for Eventing
Support for GPU workloads
Rolling Updates (using OLM)
App Migration ("Knatify")
Tech Preview 1
Nov 2019
Knative Eventing (TP)
Developer Console (Eventing)
Advanced Metering (Cost)
Functions Catalog (Kscout)
Program for ISV Event Sources
Camel-K productization

30. CALL TO ACTION
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What Next?
● Learn more about Knative, Camel-K, Strimzi, et al.
● Kick the tires on OCP 4.2 via OperatorHub
● Run the demo
● Hack the demo and create your own apps!
Additional Resources
https://openshift.com/learn/topics/serverless
http://bit.ly/knative-tutorial
https://github.com/markito/kqr-pay/tree/camel-k
Tech Preview 4.2

31. CONFIDENTIAL Designator
Where do I go to learn more about Red Hat and Serverless?
OPTIONAL SECTION MARKER OR TITLE
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OpenShift Serverless
Build and deploy serverless applications
using an event-driven infrastructure on Red
Hat® OpenShift®
Tutorial
Get started with your serverless journey
Knative Blog series
Knative: Serving your Serverless Services

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