What s New in K8s 1.3

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Janice Carpenter
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1 What s New in K8s 1.3 Carter Morgan

2 Background: 3 Hurdles

3 How do I write scalable apps? The App How do I package and distribute? What runtimes am I locked into?

4 Can I scale? The Infra Is it automatic? Am I locked in?

5 The Wild Where are my machines? How do I update?

6 Open Source Container Automation Framework Kubernetes Open API Based on Google s experiences

7 3 Claims

8 How does k8s hold up?

9 Kubernetes Pre 1.3 (already had a lot) Horizontal Scaling Automated Rollbacks Container Scheduling Resource Quotas and Limits Self-healing Service Discovery and Load Balancing Secret and Configuration Management Daemon Sets Secrets and Config Maps Deployments

10 Monolith auth monolith nginx nginx Microservices

11 Container Based Photo ptnimages via Canva.com

12 s Logical Application One or more containers and volumes Shared namespaces One IP per pod nginx monolith GCE iscsi NFS

13 Labels Arbitrary metadata attached to any API object Queryable by Selectors How Kubernetes does grouping nginx nginx monolith monolith labels: version: v1 track: stable labels: version: v1 track: test

14 Labels selector: version=v1 nginx nginx monolith monolith labels: version: v1 track: stable labels: version: v1 track: test

15 Labels selector: track=stable nginx nginx monolith monolith labels: version: v1 track: stable labels: version: v1 track: test

16 Services Persistent IPs for s Uses Labels to Target s Internal or External IPs Service nginx nginx monolith monolith

17 app: replicas: Deployments Drive current state towards desired state

18 app: replicas: Deployments Drive current state towards desired state

19 app: replicas: Deployments Drive current state towards desired state

20 app: replicas: Deployments Drive current state towards desired state

21 Service 1 Rolling Update

22 Service 1 Rolling Update goodbye

23 Service 1 Rolling Update goodbye

24 Service 1 Rolling Update goodbye

25 Service 1 goodbye Rolling Update goodbye

26 Service 1 goodbye Rolling Update goodbye

27 Service 1 goodbye Rolling Update goodbye

28 Service 1 goodbye Rolling Update goodbye

29 Service goodbye 1 goodbye Rolling Update goodbye

30 Service goodbye 1 goodbye Rolling Update goodbye

31 Service goodbye 1 goodbye Rolling Update goodbye

32 Service goodbye 1 goodbye Rolling Update goodbye

33 3 Claims: revisited

34 Kubernetes 1.3

35 Kubernetes 1.3

36 Kubernetes 1.3 Init containers (alpha) Fixed PDs Cluster Federation (alpha) Optional HTTP2 Level QoS Policy Tls secrets kubectl set command UI Jobs RBAC (alpha, experimental) Garbage Collector (alpha) Pet Sets rkt Container runtime Network policies (and more)

37 Cluster Federation Manage clusters across region and providers

38 Jobs s *expected* to terminate Creates 1...n s and ensures that a certain number of them run to completion 3 types: non-parallel, fixed count parallel, and parallel with a work queue

39 Job: Work Queue with Per Work Item

40 Init 1 Init Containers Sequential Initialization Init 2 Init 3 monolith NFS

41 Init Container: register pod to external service

42 Init Container: clone a git repo into a volume

43 s are fungible, stateless? Pet Sets s with ego Pets are s with: Stable hostname A unique name Stable storage

44 Pet Sets s with ego

45 PetSet: example manifest

46 PetSet: headless service

47 Bonus

48 Google Container Engine (GKE) Cluster autoscaling (beta) IAM support Local SSD Container-VM Images (beta) pools

49 minikube github.com/kubernetes/minikube

50 Kube UI kubernetes.io/docs/user-guide/ui/

51 Thing I learned (making this talk) (making this talk)

52 Recap

53 The App 3 Hurdles The Infra The Wild

54 Planet Scale 3 Claims Never Outgrow Run Anywhere

55 Planet Scale - SLA 2000 nodes Kubernetes 1.3 Never Outgrow - minikube to prod Run Anywhere - Cluster Federation

56 Scalable Microservice with Kubernetes

57 Learn more here! Carter Morgan

What s New in K8s 1.3

What s New in K8s 1.3 Carter Morgan Background: 3 Hurdles How do I write scalable apps? The App How do I package and distribute? What runtimes am I locked into? Can I scale? The Infra Is it automatic?