Sample Controller(Foo Controller)

This Controller is developed by Operator SDK v0.10.0

技術書典7で頒布した「実践入門 Kubernetesカスタムコントローラへの道」の第六章に掲載したサンプルコード用のリポジトリです。

What is this Controller

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.

How to run

Clone source code

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

Run localy

$ kubectl apply -f deploy/crds/samplecontroller_v1alpha1_foo_crd.yaml
$ OPERATOR_NAME=foo-controller operator-sdk up local
$ kubectl apply -f deploy/crds/samplecontroller_v1alpha1_foo_cr.yaml

Run container as Deployment

$ kubectl apply -f deploy/crds/samplecontroller_v1alpha1_foo_crd.yaml
$ kubectl apply -f deploy/
$ kubectl apply -f deploy/crds/samplecontroller_v1alpha1_foo_cr.yaml

Reference

This project is inspired by

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

Update History

2019/09/21 Modified mistaken word foo_controller.go

Before	After
reqLogger.Error(err, "failed to get Deployment for Foo resource")	reqLogger.Error(err, "failed to update Deployment for Foo resource")