kube-operator-basic

Getting Started for dev

• Create project using init command

mkdir -p kube-operator-basic
kubebuilder init --domain sample-operator.dev --repo github.com/ragul28/kube-operator-basic

• Create custom resource

kubebuilder create api --group basic --version v1 --kind BasicVolume

• Update api types & genarate manifests

make generate
make manifests

• Update the controller reconcile logic & install crd to cluster

make install

• Apply the Sample CRD

kubectl apply -f config/samples/

• Run controller in local

make run

Running on the cluster

1. Install Instances of Custom Resources:

kubectl apply -f config/samples/

2. Build and push your image to the location specified by IMG:

make docker-build docker-push IMG=<some-registry>/kube-operator-basic:tag

3. Deploy the controller to the cluster with the image specified by IMG:

make deploy IMG=<some-registry>/kube-operator-basic:tag

Uninstall CRDs

To delete the CRDs from the cluster:

make uninstall

Undeploy controller

UnDeploy the controller to the cluster:

make undeploy

How it works

This project aims to follow the Kubernetes Operator pattern

It uses Controllers which provides a reconcile function responsible for synchronizing resources untile the desired state is reached on the cluster

Test It Out

1. Install the CRDs into the cluster:

make install

2. Run your controller (this will run in the foreground, so switch to a new terminal if you want to leave it running):

make run

NOTE: You can also run this in one step by running: make install run