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simple-controller

This repository implements a simple controller based on controller-runtime for watching AppService resources as defined with a CustomResourceDefinition (CRD).

Note: When your clone is done, you should "go mod tidy" and then "go mod vendor".

This example mainly demonstrates how to use the controller-runtime to create an operator from zero, including the following:

  1. How do initialize CRD-related files
  2. How to use code-generator to generate code
  3. How to implement controller business logic
  4. How to debug/deploy locally on a cluster

We use ./hack/update-codegen.sh to generate the deepcopy and register file.(update-codegen.sh comes from kosmos-io/kosmos&k8s.io/code-generator)

The update-codegen script will automatically generate the following files:

  • pkg/apis/v1/zz_generated.deepcopy.go
  • pkg/apis/v1/zz_generated.register.go

You should not edit these files, but run the script to generate your own files while writing your own controller.