Operator Hub and your Kubernetes Cluster

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With the Operator Lifecycle Manager Operator Hub and your Kubernetes Cluster Josh Wood Developer Advocate, Red Hat [email protected] – @joshixisjosh9 – joshix.com 1

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2 Why should you care about Operators?

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3 Any application in any system must be installed, configured, managed and upgraded over time Patching is critical to security

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“Anything that isn’t automated is slowing you down” 4

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5 What is Kubernetes? An open source orchestration system for managing containerized workloads across a cluster of nodes.

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6 Kubernetes Object Definitions kind: Pod apiVersion: v1 metadata: name: example-app spec: containers: - name: example image: quay.io/my/app:v1.2.0 [...]

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Kubernetes is a declarative platform 7

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8 Scaling stateless apps: easy

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9 $ kubectl scale deploy/staticweb --replicas=3

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10 scale up count=1 desired=3 ReplicaSet

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11 start count=3 desired=3 ReplicaSet

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12 What about apps that store data?

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13 Deploying a database is easy

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14 $ kubectl create deployment db --image=quay.io/my/db

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15 Running a database over time is harder

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16 ● Resize/Upgrade ● Reconfigure ● Backup ● Healing

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17 If only Kubernetes knew...

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18 1. Application-specific custom controllers 2. Custom resource definitions (CRD) Extending the Kubernetes API

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19 Custom Resource Developer / Kubernetes User Deployments StatefulSets Autoscalers Secrets Conﬁg maps PersistentVolume How Does an Operator Work? K8s API kind: ProductionReadyDatabase apiVersion: database .example.com/v1alpha1 metadata: name: my-important -database spec: connectionPoolSize: 300 readReplicas: 2 version: v4.0.1 Custom Kubernetes Controller Watch Events Reconciliation + Custom Resource Deﬁnition Kubernetes Operator Native Kubernetes Resources

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20 Custom Resource (CR) kind: ProductionReadyDatabase apiVersion: database.example.com/v1alpha1 metadata: name: my-production-ready-database spec: clusterSize: 3 readReplicas: 2 version: v4.0.1 [...]

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23 Operators are automated software managers that manage the entire lifecycle of Kubernetes applications

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Value of Operators 24 Improve the “time to ﬁrst value” for your customers Minimize software upgrade risk and associated operational costs Embed best practices from the experts – you – into the Operator Provide a cloud-like "As a Service" experience

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Operator Deployment Custom Resource Deﬁnitions RBAC API Dependencies Update Path Metadata YourOperator v1.1.2 Bundle OPERATOR LIFECYCLE MANAGER Deployment Role ClusterRole RoleBinding ClusterRoleBinding ServiceAccount CustomResourceDefinition OPERATOR LIFECYCLE MANAGER: The Operator Operator 25

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26 OPERATOR LIFECYCLE MANAGER YourOperator v1.1.2 YourOperator v1.1.3 YourOperator v1.2.0 YourOperator v1.2.2 Subscription for YourOperator Time Version Operator Catalog OPERATOR LIFECYCLE MANAGEMENT

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OPERATOR SDK KUBERNETES OPERATOR + = + OPERATOR LIFECYCLE MANAGER + USER “create new operator” scaffolding custom logic metadata package “make available to” “list packages” “subscribe to channel” subscription namespace operator instance managed application “Create application” SERVICE INSTANTIATION PUBLISHER ADMINISTRATOR + 27 AUTHOR

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28 Use Operators Today OperatorHub.io is a home for the Kubernetes community to share Operators. Find an existing Operator or list your own today.

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29 Red Hat Products ISV Partners Community TYPES OF OPERATORS OPERATOR HUB Operator Hub - Allows administrators to selectively make operators available from curated sources to users in the cluster.

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31 Easy self service of Operator-backed Services Reduce friction for deploying operator backed applications ● Rich UI for creating and mutating the app instances

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32 ...and many more OPERATORS ACROSS THE INDUSTRY

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33 Operator Maturity Model Phase I Phase II Phase III Phase IV Phase V Basic Install Automated application provisioning and conﬁguration management Seamless Upgrades Patch and minor version upgrades supported Full Lifecycle App lifecycle, storage lifecycle (backup, failure recovery) Deep Insights Metrics, alerts, log processing and workload analysis Auto Pilot Horizontal/vertical scaling, auto conﬁg tuning, abnormal detection, scheduling tuning

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34 https://github.com/operator-framework https://operatorhub.io https://learn.openshift.com/operatorframework/ http://bit.ly/kubernetes-operators Resources

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Thank you linkedin.com/showcase/red-hat-developer youtube - bit.ly/2YRIWTk facebook.com/redhatdeveloperprogram twitter.com/rhdevelopers 35 Josh Wood [email protected] @joshixisjosh9 joshix.com