# k8s-controller-custom-resource

**Repository Path**: github-5407963/k8s-controller-custom-resource

## Basic Information

- **Project Name**: k8s-controller-custom-resource
- **Description**: No description available
- **Primary Language**: Unknown
- **License**: Not specified
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 0
- **Forks**: 0
- **Created**: 2021-03-16
- **Last Updated**: 2021-03-16

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

# Kubernetes Custom Controller - Custom Resource Handling

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

## What is 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:

```
$ git clone https://github.com/resouer/k8s-controller-custom-resource
$ cd k8s-controller-custom-resource
```

Prepare build environment:

```
$ go get github.com/tools/godep
$ godep restore
```

Build and run:

```
$ go build -o samplecrd-controller .
$ ./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:

```
$ kubectl apply -f crd/network.yaml
```

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

```
$ kubectl apply -f example/example-network.yaml
```

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

Enjoy!