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apiexport Example Controller

This folder contains an example controller for the virtualworkspace provider implementation. It reconciles ConfigMap objects across kcp workspaces.

It can be tested by applying the necessary manifests from the respective folder while connected to the root workspace of a kcp instance:

$ kubectl apply -f ./manifests/
apiexport.apis.kcp.io/examples-apiexport-multicluster created
workspacetype.tenancy.kcp.io/examples-apiexport-multicluster created
workspace.tenancy.kcp.io/example1 created
workspace.tenancy.kcp.io/example2 created
workspace.tenancy.kcp.io/example3 created

Then, start the example controller by passing the virtual workspace URL to it:

$ go run . --server=$(kubectl get apiexport examples-apiexport-multicluster -o jsonpath="{.status.virtualWorkspaces[0].url}")

Observe the controller reconciling the kube-root-ca.crt ConfigMap created in each workspace:

2025-03-06T20:16:18+01:00	INFO	Reconciling configmap	{"controller": "kcp-configmap-controller", "controllerGroup": "", "controllerKind": "ConfigMap", "reconcileID": "674a4e78-fec6-4e38-a6c2-0a8855259905", "cluster": "27uqz02z4wed6sjb", "name": "kube-root-ca.crt", "uuid": "4fb98e39-23f2-41b7-84a5-60163ca55148"}
2025-03-06T20:16:18+01:00	INFO	Reconciling configmap	{"controller": "kcp-configmap-controller", "controllerGroup": "", "controllerKind": "ConfigMap", "reconcileID": "913bccc0-bc3b-44b6-8508-8f84f6df5340", "cluster": "36ise8guls0p4mb9", "name": "kube-root-ca.crt", "uuid": "0dd90698-ff41-4216-84c3-64125b8dc32d"}
2025-03-06T20:16:18+01:00	INFO	Reconciling configmap	{"controller": "kcp-configmap-controller", "controllerGroup": "", "controllerKind": "ConfigMap", "reconcileID": "0aebc78a-a531-49e8-86c5-17a7407c57e2", "cluster": "1u97oi9csiunqu76", "name": "kube-root-ca.crt", "uuid": "c2094526-68f7-4743-bb6b-1492b2630419"}