https://github.com/bbbmj/k8s-crd-controller-example

Base example for a custom controller in Kubernetes working with custom resources. Based on https://github.com/resouer/k8s-controller-custom-resource.
https://github.com/bbbmj/k8s-crd-controller-example

code-generator crd custom-control custom-resource-definition custom-resources kubernetes kubernetes-controller

Last synced: about 1 month ago
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Base example for a custom controller in Kubernetes working with custom resources. Based on https://github.com/resouer/k8s-controller-custom-resource.

• Host: GitHub
• URL: https://github.com/bbbmj/k8s-crd-controller-example
• Owner: bbbmj
• License: apache-2.0
• Created: 2018-10-23T03:52:10.000Z (over 6 years ago)
• Default Branch: master
• Last Pushed: 2018-10-23T08:51:44.000Z (over 6 years ago)
• Last Synced: 2024-11-16T20:42:39.773Z (3 months ago)
• Topics: code-generator, crd, custom-control, custom-resource-definition, custom-resources, kubernetes, kubernetes-controller
• Language: Go
• Homepage:
• Size: 4.12 MB
• Stars: 3
• Watchers: 3
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# k8s-crd-controller-example

Based on `https://github.com/resouer/k8s-controller-custom-resource`.

**Note**: the source code is _verbosely_ commented, so the source is meant to be read and to teach.

## What's this?

An example of a custom Kubernetes controller that's only purpose is to watch for the creation, updating, or deletion of all custom resource of type `Network` (in the all namespaces). This was created as an exercise to understand how Kubernetes controllers work and interact with the cluster and resources.

## Running

Clone repo:

```bash

git clone https://github.com/bbbmj/k8s-crd-controller-example

cd k8s-crd-controller-example

```

Build and run:

```bash

go build -o bin/samplecrd-controller ./cmd/

./bin/samplecrd-controller -kubeconfig=$HOME/.kube/config -alsologtostderr=true

```

You can also use `samplecrd-controller` to create a Deployment and run it in Kubernetes. Note in this case, you don't need to specify `-kubeconfig` in CMD as default `InClusterConfig` will be used.

## Usage

You should create the CRD of Network first:

```bash

kubectl apply -f artifacts/network-crd.yaml

```

You can then trigger an event by creating a Network API instance:

```bash

kubectl apply -f artifacts/my-network.yaml

```

CURD the Network API instance, and check the logs of controller.

Enjoy!