Operator Hub and your Kubernetes Cluster

Red Hat DevNation Tech Talk demonstrating how to use Operator Lifecycle Manager (OLM) and software catalogs like OperatorHub.io to deploy and maintain foundation software like databases on any Kubernetes cluster.

Transcript

1. With the Operator Lifecycle Manager Operator Hub and your Kubernetes Cluster Josh Wood Developer Advocate, Red Hat joshix@redhat.com – @joshixisjosh9 – joshix.com 1
2. 2 Why should you care about Operators?
3. 3 Any application in any system must be installed, configured, managed and upgraded over time Patching is critical to security
4. “Anything that isn’t automated is slowing you down” 4
5. 5 What is Kubernetes? An open source orchestration system for managing containerized workloads across a cluster of nodes.
6. 6 Kubernetes Object Definitions kind: Pod apiVersion: v1 metadata: name: example-app spec: containers: - name: example image: quay.io/my/app:v1.2.0 [...]
7. Kubernetes is a declarative platform 7
8. 8 Scaling stateless apps: easy
9. 9 $ kubectl scale deploy/staticweb --replicas=3
10. 10 scale up count=1 desired=3 ReplicaSet
11. 11 start count=3 desired=3 ReplicaSet
12. 12 What about apps that store data?
13. 13 Deploying a database is easy
14. 14 $ kubectl create deployment db --image=quay.io/my/db
15. 15 Running a database over time is harder
16. 16 • Resize/Upgrade • Reconfigure • Backup • Healing
17. 17 If only Kubernetes knew...
18. 18 1. Application-specific custom controllers 2. Custom resource definitions (CRD) Extending the Kubernetes API
19. 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
20. 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 [...]
23. 23 Operators are automated software managers that manage the entire lifecycle of Kubernetes applications
24. 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
25. 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
26. 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
27. 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
28. 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.
29. 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.
31. 31 Easy self service of Operator-backed Services Reduce friction for deploying operator backed applications • Rich UI for creating and mutating the app instances
32. 32 ...and many more OPERATORS ACROSS THE INDUSTRY
33. 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
34. 34 https://github.com/operator-framework https://operatorhub.io https://learn.openshift.com/operatorframework/ http://bit.ly/kubernetes-operators Resources
35. Thank you linkedin.com/showcase/red-hat-developer youtube - bit.ly/2YRIWTk facebook.com/redhatdeveloperprogram twitter.com/rhdevelopers 35 Josh Wood joshix@redhat.com @joshixisjosh9 joshix.com