Kubernetes 101 Google IO Talk

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Best Practices for Orchestrating the Cloud with Kubernetes Carter Morgan @_askcarter

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Photo © Annette Shaff via Canva.com #K8story

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monolith nginx hello nginx Microservices Monolith auth

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Use Containers Photo © ptnimages via Canva.com Best Practice

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Container Demo

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But that’s just one machine Discovery Scaling Security Monitoring Configuration Scheduling Health

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Automate and Monitor Photo © 3Dalia via Canva.com Best Practice

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Avoid Vendor Lock-in Photo © Michele Piacquadio via Canva.com Best Practice

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

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Velocity 1.0 1.1 1.2 v1.2: - 5k commits - +50% unique contributors Source: http://github.com/kubernetes/kubernetes

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1.2 • Deployments • DaemonSets • New UI • Simplified Deployments • Automated Cluster Management • Improved Scale 1.3 • Legacy application support • Cluster Federation • More nodes • In-cluster IAM • Scheduled jobs • Cluster autoscaling • Public cloud dashboard

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Community Companies Contributing Companies Using 1200+ external projects based on k8s 800+ unique contributors Top 0.01% of all Github projects

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Kubernetes Quick Demo

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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

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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

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

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

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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

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

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

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

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

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monolith nginx hello nginx Microservices Monolith auth

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Kubernetes Demo

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What about code updates? Photo © hjalmeida via Canva.com

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Deploy with care Photo © Green Jo via Canva.com Best Practice

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Rolling Update Node 1 Pod hello Pod hello Node Pod hello Node Pod hello Node Pod hello Service

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

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

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

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

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

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

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Rollout Node 1 Pod hello Pod hello Node Pod hello Node Node Service Pod goodbye Pod goodbye

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

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

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

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

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Rollout Demo

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Best Practices Recap The App: Use containers The Infra: Automate and Monitor The Infra: Avoid Lock-in The Wild: Deploy with Care

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DevOps Engineer Nanodegree Program Scalable Microservices with Kubernetes course