What's new in Kubernetes 1.3

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What’s New in K8s 1.3 Carter Morgan @_askcarter @_askcarter

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Background: 3 Hurdles @_askcarter

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

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

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The Wild Where are my machines? How do I update? @_askcarter

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Kubernetes Open Source Container Automation Framework • Open API • Based on Google’s experiences @_askcarter

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3 Claims @_askcarter

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How does k8s hold up? @_askcarter

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Kubernetes Pre 1.3 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 (already had a lot) @_askcarter

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monolith nginx hello nginx Microservices Monolith auth @_askcarter

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Container Based Photo © ptnimages via Canva.com @_askcarter

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Pods Logical Application • One or more containers and volumes • Shared namespaces • One IP per pod Pod nginx monolith NFS iSCSI GCE 10.1.0.100 @_askcarter

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

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Labels selector: version=v1 Pod nginx monolith Pod nginx monolith labels: version: v1 track: stable labels: version: v1 track: test @_askcarter

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Labels selector: track=stable Pod nginx monolith Pod nginx monolith labels: version: v1 track: stable labels: version: v1 track: test @_askcarter

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Services Persistent IPs for Pods • Uses Labels to Target Pods • Internal or External IPs Pod nginx monolith Pod nginx monolith Service 10.8.244.100 10.1.0.2 10.1.0.1 @_askcarter

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Deployments Drive current state towards desired state Node 1 Pod app: hello replicas: 1 hello Node 2 @_askcarter

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Deployments Drive current state towards desired state Node 1 Pod app: hello replicas: 2 hello Node 2 Pod hello @_askcarter

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Deployments Drive current state towards desired state Node 1 Pod app: hello replicas: 2 hello Node 2 @_askcarter

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Deployments Drive current state towards desired state Node 1 Pod app: hello replicas: 2 hello Node 2 Pod hello @_askcarter

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Rolling Update Node 1 Pod hello Pod hello Node Pod hello Node Pod hello Node Pod hello Service @_askcarter

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Rolling Update Node 1 Pod hello Pod hello Node Pod hello Node Pod hello Node Pod hello Service Pod goodbye @_askcarter

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Rolling Update Node 1 Pod hello Pod hello Node Pod hello Node Pod hello Node Pod hello Service Pod goodbye @_askcarter

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Rolling Update Node 1 Pod hello Pod hello Node Pod hello Node Pod hello Node Pod hello Service Pod goodbye @_askcarter

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Rolling Update Node 1 Pod hello Pod hello Node Pod hello Node Node Pod hello Service Pod goodbye Pod goodbye @_askcarter

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Rolling Update Node 1 Pod hello Pod hello Node Pod hello Node Node Pod hello Service Pod goodbye Pod goodbye @_askcarter

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Rolling Update Node 1 Pod hello Pod hello Node Pod hello Node Node Pod hello Service Pod goodbye Pod goodbye @_askcarter

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Rolling Update Node 1 Pod hello Pod hello Node Pod hello Node Node Service Pod goodbye Pod goodbye @_askcarter

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Rolling Update Node 1 Pod hello Pod hello Node Pod hello Node Node Service Pod goodbye Pod goodbye Pod goodbye @_askcarter

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Rolling Update Node 1 Pod hello Pod hello Node Pod hello Node Node Service Pod goodbye Pod goodbye Pod goodbye @_askcarter

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Rolling Update Node 1 Pod hello Pod hello Node Pod hello Node Node Service Pod goodbye Pod goodbye Pod goodbye @_askcarter

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Rolling Update Node 1 Pod hello Pod hello Node Node Node Service Pod goodbye Pod goodbye Pod goodbye @_askcarter

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3 Claims: revisited @_askcarter

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Kubernetes 1.3 @_askcarter

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Kubernetes 1.3 @_askcarter

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Kubernetes 1.3 Init containers (alpha) Fixed PDs Cluster Federation (alpha) Optional HTTP2 Pod 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) @_askcarter

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Cluster Federation Manage clusters across region and providers @_askcarter

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

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Job: Work Queue with Pod Per Work Item @_askcarter

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Init Containers Sequential Pod Initialization @_askcarter Pod Init 1 monolith NFS 10.1.0.100 Init 2 Init 3

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Init Container: register pod to external service @_askcarter

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Init Container: clone a git repo into a volume @_askcarter

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Pet Sets Pods with ego Pods are fungible, stateless? Pets are Pods with: 1. Stable hostname 2. A unique name 3. Stable storage @_askcarter

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Pet Sets Pods with ego @_askcarter

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PetSet: example manifest @_askcarter

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PetSet: headless service @_askcarter

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Bonus @_askcarter

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

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minikube github.com/kubernetes/minikube @_askcarter

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Kube UI kubernetes.io/docs/user-guide/ui/ @_askcarter

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Thing I learned (making this talk) (making this talk) @_askcarter

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Recap @_askcarter

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3 Hurdles The App The Infra The Wild @_askcarter

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3 Claims Planet Scale Never Outgrow Run Anywhere @_askcarter

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

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Scalable Microservice with Kubernetes @_askcarter

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Carter Morgan @_askcarter Learn more here! http://blog.kubernetes.io/2016/07/kubernetes-1.3-bridging-cloud-native-and-enterprise-workloads.html @_askcarter