The document discusses using Docker Desktop and Telepresence to enable "remocal" development of microservice systems. Telepresence proxies a local machine into a Kubernetes cluster, allowing fast feedback by running code changes directly in the cluster. The Docker Desktop extension for Telepresence integrates this capability, allowing developers to use local tools while their code runs on Kubernetes. This enables a smooth development workflow for building and testing microservice applications in Kubernetes.

1. Building Microservice Systems
Without Cooking Your Laptop
Going “Remocal” with Docker, Telepresence & Kubernetes
Daniel Bryant
@danielbryantuk
Felipe Cruz
@felipecruz

2. @danielbryantuk | @felipecruz
tl;dr
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• The inner development loop can be painful with microservices & Kubernetes
• Docker Desktop enables your development journey to cloud native
• Telepresence “proxies” your local machine into the cluster, increasing fast feedback
• Docker Desktop Extension for Telepresence enables “remocal” development
• Telepresence supports several workflows to make you more productive

3. @danielbryantuk | @felipecruz
@danielbryantuk
3
Daniel Bryant
@danielbryantuk
Ambassador Labs
Felipe Cruz
@felipecruz
Docker

4. @danielbryantuk | @felipecruz
Setting the Scene
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5. @danielbryantuk | @felipecruz
Inner and outer dev loops
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Hat tip to Mitch Denny (now 404): https://mitchdenny.com/the-inner-loop/
http://jorgemoral.es/posts/2020_03_17-develop_apps…

6. @danielbryantuk | @felipecruz
SOA: There’s just more stu
ff
(and dependencies)
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7. @danielbryantuk | @felipecruz
So, let’s run everything locally…
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8. @danielbryantuk | @felipecruz
Docker Desktop becomes your second IDE
Body Text
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9. @danielbryantuk | @felipecruz
But if you’re
successful…
Mo’ services,
mo’ problems
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10. @danielbryantuk | @felipecruz
tl;dr
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“My laptop only has 16GB
RAM and you’re asking it
to run Kubernetes and a
JVM and a database???”

11. @danielbryantuk | @felipecruz
Okay, let’s run everything remotely…
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12. @danielbryantuk | @felipecruz
Inner and outer dev loops with K8s
can be the same
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• Write code
• Build container
• Push to registry
• Deploy to cluster
• Test
And can be …. SLOW.

13. @danielbryantuk | @felipecruz
Automation can help…
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14. @danielbryantuk | @felipecruz
tl;dr
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But you want a really fast inner loop (no docker build/push) …

15. @danielbryantuk | @felipecruz
tl;dr
15 And you want to use your own tools.

16. @danielbryantuk | @felipecruz
tl;dr
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And you want to avoid the “works on my machine”
production vs local development debacle

17. @danielbryantuk | @felipecruz
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+

18. @danielbryantuk | @felipecruz
What are Docker Extensions?
Extend Docker Desktop
A way to add new functionality into
Docker Desktop
Improve your team workflows
Connect your favorite dev tools to your
application development and
deployment workflows
Distribution channel
for your tooling
A way for the community and partners
to reach million of developers
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19. @danielbryantuk | @felipecruz
What is Telepresence
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• “Fancy Kubernetes VPN for development”
• “kubectl port-forward on steroids”
• “kubectl proxy all-the-things”
• A network bridge between your laptop and the Kubernetes cluster

20. @danielbryantuk | @felipecruz
Demo Time!
20

21. @danielbryantuk | @felipecruz
Our Emoji-User Demo App $$$
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Web
Emoji
User
Ambassador
Edge Stack
(Ingress)
T
A
Traf
fi
c-
manager
User

22. @danielbryantuk | @felipecruz
Docker Desktop Extension for Telepresence
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getambassador.io/testing-with-telepresence-and-docker

23. @danielbryantuk | @felipecruz
Key scenarios
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24. @danielbryantuk | @felipecruz
Remocal development
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www.slideshare.net/dbryant_uk/jax-london-22-debugging-microservices-remocally-in-kubernetes-with-telepresence

25. @danielbryantuk | @felipecruz
Testing Microservices: What to use, when
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Mocks Service virtualization Remocal
Unit tests ✅
Integration tests ✅ ✅
Component tests ✅ ✅ ✅
End-to-end tests ✅ ✅
Poking around an
existing API
✅
Building an API ✅ ✅

26. @danielbryantuk | @felipecruz
Continuous Delivery
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https://learning.oreilly.com/library/view/continuous-delivery-in/9781491986011/ch01.html#idm140291459013360
https://www.youtube.com/watch?v=hJkhPP2OLA8&t=291s

27. @danielbryantuk | @felipecruz
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Continuous Delivery and build pipelines

28. @danielbryantuk | @felipecruz
Wrapping up
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29. @danielbryantuk | @felipecruz
Telepresence is a CNCF project, with a wide variety of users
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30. @danielbryantuk | @felipecruz
Conclusion
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• The inner development loop can be painful with microservices & Kubernetes
• Docker Desktop enables your development journey to cloud native
• Telepresence “proxies” your local machine into the cluster, increasing fast feedback
• Docker Desktop Extension for Telepresence enables “remocal” development
• Telepresence supports several workflows to make you more productive

31. @danielbryantuk | @felipecruz
Thank you! Questions?
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Sample code and extensions:
• github.com/ambassadorlabs/docker-extension-telepresence-java
• docs.docker.com/desktop/extensions/
Learn more:
• www.getambassador.io/kubernetes-learning-center/telepresence-docker-extension/
• hub.docker.com/extensions/ambassador/telepresence-docker-extension