KubeCon Keynote 2016- Distributed Systems Simplified on Kubernetes

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Demo https://github.com/philips/etcd-prometheus-operator-demo

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Brandon Philips @brandonphilips | [email protected] | coreos.com Distributed Systems Simplified Using Kubernetes

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Overview Scaling Stateless Apps

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ReplicaSet

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ReplicaSet

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Overview Scaling Complex Apps

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$ kubectl run db --image=quay.io/my/db Creating a Database is Easy on Kubernetes

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● Resize/Upgrade - coordination for availability ● Reconfigure - tedious generation / templating ● Backup - requires coordination on instances ● Healing - observe and act for recovery Managing a Distributed Database is Harder

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Idea: Extend Kubernetes

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$ cat my-db-cluster.yaml spec: clusterSize: 3 readReplicas: 2 version: v4.0.1 The Dream

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Introducing Operators

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etcd Overview ● Introduced in 2013 by CoreOS ● Primary datastore of Kubernetes ● Auto-leader election for availability

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$ cat etcd-cluster.yaml spec: clusterSize: 3 version: v3.1.0 etcd Operator Resource

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etcd Operator

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etcd Operator Open-source github.com/coreos/etcd-operator

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Kubernetes self-hosting etcd Easy HA Setups on Kubernetes Automated backup to object store Chaos Monkey Testing for 1.0 etcd Operator - Future Work

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Prometheus Operator ● Operates Prometheus on k8s ● Handles common tasks: ○ Create/Destroy ○ Monitor Configuration ○ Services Targets via Labels ● Configured by resources

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Prometheus Operator Also Open-source github.com/coreos/prometheus-operator

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● Read more at coreos.com/blog ● Try out these new Operators ● Build and Discuss other Operators (redis, postgres, etc) Next Steps

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Thank you! Brandon Philips @brandonphilips | [email protected] | tectonic.com We’re hiring in all departments! Email: [email protected] Positions: coreos.com/ careers