Building a Raspberry Pi cluster with Kubernetes, OpenFaaS and .NET
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The document details the process of building a Raspberry Pi (RPI) Kubernetes cluster to run .NET Core applications using OpenFaaS. It discusses the benefits of self-hosting a cloud environment, key Kubernetes concepts, and practical configurations for deploying serverless functions. Additionally, it emphasizes the community's involvement and provides insights into software and hardware considerations for setting up the cluster.
![Multi-Arch Cross
Compilation
Build in a container
Publish to specific
CPU Arch
Use correct runtime
FROM microsoft/dotnet:2.0-sdk as builder
RUN mkdir -p /root/src/function
WORKDIR /root/src/function
COPY ./function/Function.csproj .
WORKDIR /root/src/
COPY ./root.csproj .
RUN dotnet restore ./root.csproj
COPY . .
RUN dotnet publish -c release -o published -r linux-arm
ADD https://github.com/openfaas/faas/releases/download/0.6.1/fwatchdog-armhf
/usr/bin/fwatchdog
RUN chmod +x /usr/bin/fwatchdog
FROM microsoft/dotnet:2.0.0-runtime-stretch-arm32v7
WORKDIR /root/
COPY --from=builder /root/src/published .
COPY --from=builder /usr/bin/fwatchdog /
ENV fprocess="dotnet ./root.dll"
EXPOSE 8080
CMD ["/fwatchdog"]](https://image.slidesharecdn.com/kubernetesandopenfaasand-180119112233/85/Building-a-Raspberry-Pi-cluster-with-Kubernetes-OpenFaaS-and-NET-39-320.jpg)
Building a Raspberry Pi cluster with Kubernetes, OpenFaaS and .NET
- 1. Building a Raspberry Pi Kubernetes Cluster and Running .NET Core with OpenFaaS Alex Ellis @alexellisuk Scott Hanselman @shanselman
- 2. Agenda Why build an RPi cluster? What counts as Cloud? Top community clusters Practicalities of ARM & .NET Core Intro to Kubernetes & Serverless Demos
- 3. Why build your own cluster?
- 4. ● It’s the CLOUD in your HOUSE! ● Be your own boss - you’re root, you make the rules ● UNIX heritage ● Direct access to hardware
- 5. Let’s back up. What does The Cloud™ look like?
- 6. $ See it? Can you visualize the cloud now?
- 10. How about now?
- 11. Alex’s first RPi cluster Featured in Linux User Developer Magazine Had to build Docker from source Original “Swarm” project from Docker 29 MARCH 2016
- 12. We made a podcast
- 13. The community did something awesome!
- 17. People LOVE building their own Cloud
- 18. In summary
- 19. Who needs an orchestrator anyway?
- 22. Lightweight “chroot”/sandbox Densely pack applications Immutable - same everywhere Next-gen workflow - Build/ship/run Docker Hub & store Docker brings:
- 23. container Docker container docker run -d -p 80:80 --restart=always --name=nginx-deployment nginx:1.7.9
- 24. Declarative deployments Configuration - YAML Programmable API Service discovery High availability (HA) Elastic capacity Security & extensibility Orchestration add:
- 25. container Deployment Kubernetes Deployment container Pod Pod apiVersion: apps/v1beta1 kind: Deployment metadata: name: nginx-deployment spec: replicas: 3 template: metadata: labels: app: nginx spec: containers: - name: nginx image: nginx:1.7.9 ports: - containerPort: 80
- 26. Kubernetes is an orchestrator Here are the building blocks
- 27. Zine by Julia Evans
- 28. Zine by Julia Evans
- 29. No: Accelerated gaming Bitcoin mining Windows binaries Skynet What can I do with my Pi (ARM) cluster? Yes: You can run server software Python MPI (traditional multi-processing) A blog or website, i.e. ASP.NET, Node.js, PHP etc
- 33. OpenFaaS - Serverless Functions Made Simple ● Community project ● Developer-first experience ○ UI & CLI ● 9k GitHub stars ● Award winning ● Thriving community ● Easiest way to run your own FaaS or functions
- 34. OpenFaaS Demo
- 35. Want to know more? blog.alexellis.io - launched 2015 Around 100 blog posts on Docker, Kubernetes, ARM and IoT Coding in Go, community and DevOps
- 36. What about the software? Pick an OS ● Raspbian (Debian-based) ● Hypriot (Raspbian-based) ● Ubuntu (Debian-based) Something completely different: Resin Configure each node manually Or automate with Ansible But avoid duplicating SD cards Be aware not all Docker images support ARM
- 37. Let’s talk about CPU architecture
- 38. .NET Core Best option for modern microservices in C#, ASP.NET also available Natively targets: Linux, Windows and Mac Runtime support for ARM (Raspberry Pi) Official Docker images are available from Microsoft ... .NET Core + Kubernetes
- 39. Multi-Arch Cross Compilation Build in a container Publish to specific CPU Arch Use correct runtime FROM microsoft/dotnet:2.0-sdk as builder RUN mkdir -p /root/src/function WORKDIR /root/src/function COPY ./function/Function.csproj . WORKDIR /root/src/ COPY ./root.csproj . RUN dotnet restore ./root.csproj COPY . . RUN dotnet publish -c release -o published -r linux-arm ADD https://github.com/openfaas/faas/releases/download/0.6.1/fwatchdog-armhf /usr/bin/fwatchdog RUN chmod +x /usr/bin/fwatchdog FROM microsoft/dotnet:2.0.0-runtime-stretch-arm32v7 WORKDIR /root/ COPY --from=builder /root/src/published . COPY --from=builder /usr/bin/fwatchdog / ENV fprocess="dotnet ./root.dll" EXPOSE 8080 CMD ["/fwatchdog"]
- 40. RPi Cluster Build Consideration ● Raspberry Pis like 3A+ Reliable Power ○ Anker makes a 6 port USB Charger. One plug powers the whole cluster! ○ Get a Raspberry Pi multi-layer case enclosure ○ Or build one with LEGO! ● Use flat and short Ethernet Cables. Wired >Wireless ○ Get cables of varied length. Use the minimum
- 41. Networking Challenges ● Wired networking is best. ● BlackBox makes a nice 8-port USB-Powered Hub ○ Any one of the Pis can power the Hub itself! ○ Hub sits on top of the Pi stack with magnets ● Hardest part: For portability, get a router. ○ Ideally the cluster will have either static IPs or reliable DHCP leases
- 43. BitScope blade What if we could build Skynet?
- 44. In summary ● Build your own RPi cluster ● Learn Kubernetes ● Try .NET Core ● Deploy OpenFaaS Any questions?
- 45. Thank you! @shanselman @alexellisuk http://hanselman.com http://alexellis.io