Summary
Kubebuilder provides a tool called controller-gen to generate utility code and Kubernetes object YAML, like CustomResourceDefinitions.
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These CRDs support declarative validation using an OpenAPI v3 schema in the validation section
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, and can be used to control the display of columns with kubectl get.
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Additionally, Kubebuilder provides markers that modify how the CRD validation schema is produced for the types and fields it modifies.
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These markers correspond to an OpenAPI/JSON schema option and allow for additional formatting for fields such as strings, numbers, and strings.
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The CRDs are generated under the configs/crds directory and can be customized with additional printer columns.
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Summary
Kubebuilder uses a tool called controller-gen to generate utility code and Kubernetes object YAML, like CustomResourceDefinitions. CRDs support declarative validation using an OpenAPI v3 schema in the validation section, and can be used to control the display of columns with kubectl get. CRDs can be used to convert between different versions of a Kind, and can be enabled with the +kubebuilder:printcolumn marker.
Generating CRDs - The Kubebuilder Book
kubebuilder.io
Summary
Kubebuilder provides a tool named controller-gen to generate manifests for CustomResourceDefinitions. CRDs are generated using kubebuilder annotations of the form //+kubebuilder:something... defined as Go comments in the your-api-kind>_types.go file under pkg/apis/... to specify validation for fields, additional printer columns, subresources, and more. The CRDs are generated under the configs/crds directory and can be customized with additional printer columns.
Generating CRD · The Kubebuilder Book
kubebuilder.io
Summary
The Kubebuilder Book Light provides markers that modify how the CRD validation schema is produced for the types and fields it modifies. These markers correspond to an OpenAPI/JSON schema option and allow for additional formatting for fields such as strings, numbers, and strings. Additionally, the Book Light provides default values for common types, as well as options for embedding resources and limiting the maximum length of fields.
CRD Validation - The Kubebuilder Book
kubebuilder.io
