Operators for Beginners
summary
Operators watch a Kubernetes resource, run logic and write back status so operational work becomes declarative: resource → action → status update. CustomResourceDefinitions hold schemas; Prometheus’s PodMonitor causes the operator to reconfigure Prometheus to scrape matching pods, and an S3 operator actually creates buckets outside the cluster. Development uses operator-sdk (Helm/Ansible/Go): Helm operators map CRs to charts via watches.yaml mapping, Ansible operators run playbooks with ansible-runner and Molecule tests, and Go operators can auto-generate CRDs and OpenAPI schema. OperatorHub subscription creates an installPlan to deploy updates.
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chapters (8)
- 0:00Intro
- 0:56Operator Architecture
- 4:29Example Operators
- 6:04Example Custom Resources
- 8:20Operator SDK
- 10:50Using the CR Values
- 13:23Generated Structure
- 16:27Implementing the Operator
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