bpradipt / check-node-role

Introduction

This is sample operator which will list the type of nodes based on role and take some actions

Install

Prerequisites

Ensure KUBECONFIG is pointing to a working Kubernetes cluster

Deploy the Operator

$ git clone https://github.com/bpradipt/check-node-role.git
$ cd check-node-role
$ make install && make deploy IMG=quay.io/bpradipt/check-node-role

For deploying on Power (ppc64le) use the following command

$ make install && make deploy IMG=quay.io/bpradipt/check-node-role:ppc64le

This will deploy the controller POD in the check-node-role-system namespace

$ kubectl get pods -n check-node-role-system

NAME                                                        READY   STATUS    RESTARTS   AGE
check-node-role-controller-manager-5c79c4b48-cwq97          2/2     Running   0          19m

Create a Custom Resource

$ kubectl create -f config/samples/nodeattr_v1alpha1_noderole.yaml

This will update the CR status with list of nodetypes

$ kubectl describe noderoles.nodeattr.power.io noderole-sample

[snip]
Spec:
  Controller:  true
  Infra:       false
  Worker:      true
Status:
  Controller Nodes:
    kube1-00
  Infra Nodes:
    kube1-00
  Worker Nodes:
    kube1-00
Events:  <none>

Uninstall

$ make uninstall

Hacking

Build and Push the container image

Ensure you have access to a container registry like quay.io or hub.docker.com

export REGISTRY=<registry>
export REGISTRY_USER=<user>

$ make docker build IMG=${REGISTRY}/${REGISTRY_USER}/check-node-role
$ make docker-push IMG=${REGISTRY}/${REGISTRY_USER}/check-node-role

Deploy the new image

$ make install && make deploy IMG=${REGISTRY}/${REGISTRY_USER}/check-node-role