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kustomize/functions/examples/validator-resource-requests
Karl Isenberg 4dbc0d22e1 chore: Update to Go v1.21
- go mod tidy (all modules)
- go work sync
- Fixed plugin generation for Go 1.21
- Updated linting for Go 1.21
- Fixed minecraft example for Helm v3 pull download path
- Update dev docs to mention Go 1.21
- Regenerate plugins with Go 1.21
2024-03-15 11:47:44 -07:00
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2024-03-15 11:47:44 -07:00

Validation

This is an example of implementing a validation function.

This example is written in go and uses the kyaml libraries for parsing the input and writing the output. Writing in go is not a requirement.

Function implementation

The function is implemented as an image, and built using make image.

The template is implemented as a go program, which reads a collection of input Resource configuration, and looks for invalid configuration.

Function invocation

The function is invoked by authoring a local Resource with metadata.annotations.[config.kubernetes.io/function] and running:

kustomize fn run local-resource/

This exists non-zero if there is an error.

Running the Example

Run the validator with:

kustomize fn run local-resource/

This will return an error:

cpu-requests missing for container nginx

Now uncomment the resource reservations and run again:

kustomize fn run local-resource/

This will return success