kube-bro-configmaptemplate

This repository implements a simple controller for watching ConfigMapTemplate resources as defined with a CustomResourceDefinition (CRD).

It is largely derived from the sample at https://github.com/kubernetes/sample-controller

It makes use of the generators in k8s.io/code-generator to generate a typed client, informers, listers and deep-copy functions. You can do this yourself using the ./hack/update-codegen.sh script.

The update-codegen script will automatically generate the following files & directories:

• pkg/apis/cmt/v1alpha1/zz_generated.deepcopy.go
• pkg/client/

Changes should not be made to these files manually, and when modifying this implementation you should run the update-codegen script to generate new versions.

Running

Prerequisite: Since the sample-controller uses apps/v1 deployments, the Kubernetes cluster version should be greater than 1.9.

# create a CustomResourceDefinition, ClusterRole, ServiceAccount, and
# Deployment that set up in Kubernetes the customresource and the
# controller that makes it work
$ kubectl create -f artifacts/configmaptemplate.yaml

# create a custom resource of type ConfigMapTemplate
$ kubectl create -f artifacts/examples/example-configmap-template.yaml

# check configmaps created through the custom resource
$ kubectl get configmaps

Cleanup

You can clean up the created CustomResourceDefinition with:

$ kubectl delete -f artifacts/configmaptemplate.yaml