Need for scale, the Serverless way

Take advantage of both the capabilities of Azure Kubernetes Service and the management value and cost benefit of Azure Container Instances. Use Virtual Nodes to keep up with application demands and scale workloads instantly without the need to add more nodes to the cluster.

Transcript

1. Need for scale, the serverless way Ahmed Nada Lead Consultant @readify a_nada
2. Hi, I’m Ahmed… aka Nada history.com mygc.com.au a_nada anadaz ahnada
3. Takeaways 1. Serverless option to scale Kubernetes and how it works. 2. Readiness for production @a_nada
4. Kubernetes Master Node Worker Node Worker Node
5. Azure Kubernetes Service (AKS) Master Node Worker Node Worker Node Azure Customer
6. ACI • Fast provisioning of containers. • Only pay per second for execution time. • No need to provision virtual machines. @a_nada
8. Why don’t we have both!
9. Enter Virtual Nodes
10. How to enable Virtual Nodes?
12. az aks enable-addons --resource-group rg-azbc --name aks-azbc --addons virtual-node --subnet-name sbnt-virtual-node
13. Virtual Nodes Node A Virtual Node AKS Kubelet Proxy P P P ACI P P kubectl
14. Demo 1
15. Virtual Kubelet @a_nada • Open source project started by Microsoft. • Donated to CNCF • Cloud providers support virtual-kubelet.io
16. Kubelet Is the primary “node agent” that runs on each node to manage pods.
17. Kubelet Node A Node B Master Node Kubelet Proxy P P P Kubelet Proxy P P scheduler api-server controller kubectl
18. Virtual Kubelet Node A Virtual Node AKS Kubelet Proxy P P P ACI P P kubectl
19. github.com/virtual-kubelet/
20. Provider interface
21. Providers • Alibaba Cloud Elastic Container Instance (ECI) • AWS Fargate • Azure Batch • Azure Container Instances (ACI) • Kubernetes Container Runtime Interface (CRI) • Huawei Cloud Container Instance (CCI) • HashiCorp Nomad • OpenStack Zun • vSphere Integrated Containers (VIC) @a_nada
22. Assign Pods to Node • nodeSelector • Affinity and anti-affinity • Taints and Tolerations @a_nada
23. kubectl taint nodes node1 os=linux:NoSchedule tolerations: - key: "os" operator: "Equal" value: "linux" effect: "NoSchedule" tolerations: - key: “virtual-kubelet" operator: “Exists" effect: "NoSchedule"
24. Demo 2
25. Windows-based containers • By joining Windows nodes to a Linux-based cluster, release of Kubernetes 1.14 • Using Virtual Kubelet @a_nada
26. Demo 3
27. Is it ready for production?
28. Still a preview feature
29. Limitations • Liveness and readiness probes • VNet peering • Init containers • Host aliases support • DaemonSets will not deploy pods to the virtual node @a_nada
30. Summary 1. Serverless option to scale Kubernetes. 2. Virtual Kubelet 3. Windows containers with AKS @a_nada
31. Resources @a_nada • aka.ms/VirtualNode • github.com/virtual-kubelet • virtual-kubelet.io • Community #virtual-kubelet at slack.k8s.io • aka.ms/learnkubernetes
32. a_nada Thank You anadaz ahnada