This Controller is developed by Kubebuilder v2.2.0

インプレスR&D NextPublishing「実践入門 Kubernetesカスタムコントローラーへの道」の第五章に掲載したサンプルコード用のリポジトリです。

https://nextpublishing.jp/book/11389.html

Admission Webhookのサンプルはadmission_webhookに、
Conversion Webhookのサンプルはmulti_conversionに用意しています。

This Controller reconcile foo custom resource.
Foo resource owns deployment object.

We define foo.spec.deploymentName & foo.spec.replicas.
When we apply foo, then deployment owned by foo is created.

If we delete deployment object like 'kubectl delete deployment/<deployment name>',
foo reconcile it and the deployment is created again.

Or if we scale deployment object like 'kubectl scale deployment/<deployment name> --replicas 0',
foo reconcile it and the deployment keeps the foo.spec.replicas.

Before you start this operator, you must prepare the kubernetes cluster using like Minikube, Kind.

Clone source code

$ mkdir -p $GOPATH/src/github.com/govargo
$ cd $GOPATH/src/github.com/govargo
$ git clone https://github.com/govargo/foo-controller-kubebuilder.git
$ cd foo-controller-kubebuilder

Run localy

$ make install
$ make run
$ kubectl apply -f config/samples/samplecontroller_v1alpha1_foo.yaml

Run container as Deployment

$ make install
$ make deploy
$ kubectl apply -f config/samples/samplecontroller_v1alpha1_foo.yaml

This project is inspired by

• https://github.com/kubernetes/sample-controller
• https://github.com/jetstack/kubebuilder-sample-controller