This document discusses running serverless functions on a Kubernetes cluster set up on bare metal servers. It covers shopping for hardware, setting up the Kubernetes cluster, and deploying functions using OpenFaas. Setting up Kubernetes on bare metal allows experimenting safely without cloud costs but has drawbacks like complexity and lack of Arm64 container images. The document promotes owning a home Kubernetes cluster for fun and increased server utilization.

1. Serverless on Bare-metal
Kubernetes
Sercan Değirmenci
May 2018

2. Functions on Bare-metal
Kubernetes
Sercan Değirmenci
May 2018

3. Sercan
•Co-Founder and CTO of Otsimo
•Backend, Frontend, Game
Development, ML, DevOps
•github.com/sercand

4. Agenda
•Shopping
•Cluster Setup
•Functions

5. Motivation
• Owning a Home Cluster is fun
• Safe experiment
• Increase Server Utilization

6. Shopping

7. Board
Raspberry PI 3 Odroid Asus
Pine 64 Good Old x86 Qualcomm

8. Arm on Server

9. Shopping List
• 5x Raspberry PI
• 5x Usb Cable + 5x Power Cable
• 5x Ethernet
• 5x Micro SD Card 16gb
• Ethernet Switch + Router
• HDD
• Anker 60W 6 usb Power Adaptor
RPI 3
Anker 60W Power
Switch
HDD

11. What went wrong
•Micro SD card broken
•100Mbit Ethernet Speed
•Arm64 Docker Images

12. Cables
•Micro USB
•Y USB
•Anker

13. Cluster Setup

14. Orchestration

15. is Boring

16. Feature History
Stable Version
beta/Deployment alpha/Petset
alpha/RBAC beta/RBAC
beta/Statefulset
beta/Job
beta/PodAutoscaler
Federation
Kubeadm
CRI
CustomResourceDefinitions
Stabilize
Everything
CSI
Etcd3
Kube-dns
CoreDNS
Ubuntu 16.04 Systemd
Helm

17. Kubernetes On Cloud
Google GKE
gcloud container clusters create --num-nodes=3 abc
Azure AKS
az aks create --resource-group abc --name abc --node-count 3
kops create cluster—node-count=3 abc
Aws with Kops, soon EKS

18. Container Runtime
Virtlet

19. Docker History
docker run
docker run runc
docker run runc
http
http
http Grpc

20. What is the Difference
Kubelet runcGrpc
Kubelet runcGrpc
Kubelet runcGrpc
Kubelet runc
Grpc

21. Why Docker
•Image Format
•Runtime
•Networking
•Image Registry

22. MASTER
Kubernetes on Bare-Metal
kubelet
kube-proxy
kube-api-server
kube-controller-manager
kube-scheduler
etcd3
NODE
kubelet
kube-proxy
NODE
kubelet
kube-proxy

23. Kubernetes on Bare-Metal
Master
apt install kubeadm docker-ce
kubeadm init
Node
apt install kubeadm docker-ce
kubeadm join master-ip:6443 —-token …

24. Networking
Calico Open-V Switch
kubectl apply -f kube-flannel.yml

25. Storage
NFS

26. Kubernetes Demo

27. Drawbacks
•Kubernetes becomes
complicated day by day
•Image build not solved yet
•

28. Functions

29. Functions on Cloud

30. Functions on
Kubernetes

31. 10023
openfaas/faas
2166
iron-io/functions
3147
apache/incubator-
openwhisk
2456
kubeless/kubeless
2759
fnproject/fn
3262
fission/fission

33. OpenFaas Demo

34. Drawbacks
•OpenFaas not production
ready
•UX not great
•Arm64 images not updates
very often

35. Thank You
Q & A

36. We are Hiring
sercan@otsimo.com