Cloud Native Event-Driven Applications on LKE

for more information visit http://salaboy.com and http://github.com/salaboy/orchestrating-cloud-events

Software

1
Cloud Native Event-Driven
Applications done right
Linode Webinar - 29/10/2020

2
@Salaboy
@Camunda / @ZeebeHQ / @LearnK8s
http://salaboy.com
Mauricio Salatino

4
Disclaimer
Live, Remote, WebSockets, Kubernetes,
Knative, Cloud Events, Docker, Java, my
laptop, what can possibly go wrong?

5
Once Upon a Time …
Tickets Website
Instructions/Source Code: https://github.com/salaboy/orchestrating-cloud-events/

6
Considerations
More Buyers than Actual Tickets
Huge spike in demand at sale time
Time Sensitive Reservations

7
How would you go
about
implementing
such system?

11
Tickets Website Architecture
https://learnk8s.io/kubernetes-long-lived-connections
https://github.com/salaboy/orchestrating-cloud-events

15
CI/CD
https://www.linode.com/event/learnk8s-lab-ci-cd-for-kubernetes-with-jenkins-x/

16
Packaging and
Dependency Management
> helm list
> helm repo list

17
Knative Serving.
Knative Eventing.
Universal subscrip/on, delivery, and
management of events.
Run serverless containers on Kubernetes with
ease, Kna/ve takes care of the details of
networking, autoscaling (even to zero), and
revision tracking.
> kubectl get ksvc
> kubectl get ns

18
But what about
Service to Service
interactions and
payload format?

19
Async Messaging
Cloud Provider
Specific

21
➡ Standard Envelope for sharing events
➡ Quite simple spec, but quite useful
➡ Bindings for:
➡ HTTP, AMQP, KaLa , MQTT , NATS , Avro
What?
http://cloudevents.io

23
Tickets Website (Knative)
> kubectl get broker

24
Tickets Website (Knative)
> kubectl get triggers

25
Now imagine..
10 K Users at the same time
60 K messages floating around

28
➡The sequence of events maNer
➡How do you deal with changes in this sequence?
➡It is hard to see where things are at a given /me
➡It is hard to ﬁgure out what to do when things go
wrong
Is it working? How?

29
Zeebe
Workflow Engine
• Microservices and Events Orchestration
• Available as
• SaaS (console.cloud.camunda.io)
• On-Prem (helm.zeebe.io)@ZeebeHQ
http://zeebe.io

38
Take Aways
•Cloud Native Patterns are important, use them
to choose wisely which tools do you adopt
•Build decoupled architectures where each
service/team can evolve independently
•Make sure that you promote collaboration
between technical and non-technical teams
•Tap into Open Source communities for best
practices

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