CKAD — CRD vs ConfigMap
CRD vs ConfigMap
When should you use a CRD instead of a ConfigMap?
| Feature | ConfigMap | CRD |
|---|---|---|
| Schema validation | None | Full OpenAPI schema |
| kubectl support | Generic | First-class (get, describe, edit) |
| RBAC | All ConfigMaps together | Per-resource-type RBAC |
| Watch/trigger | Manual | Controllers can watch changes |
| Status reporting | Not built-in | .status subresource |
| Use case | Configuration data | Domain-specific objects |
Use ConfigMaps for simple key-value configuration. Use CRDs when you need a custom API with validation and lifecycle management.
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