Problem

While reinstalling Metallb, the following error appears if the old entries are not removed. 
error: installation failed: rendered manifests contain a resource that already exists. unable to continue with install: customresourcedefinition "addresspools.metallb.io"

Solution

  • ♦ Delete all the Kubernetes Custom Resource Definition (CRD)s related to Metallb.
    1. Run the following command to get the list of Kubernetes CRDs. 
      kubectl get crds | grep metallb

      The list of Kubernetes CRDs appear.

    2. Run the following commands to delete each Kubernetes CRDs. 
      kubectl delete crds <crds_name>
customresourcedefinition.apiextensions.k8s.io "<crds_name>" deleted
    3. Run the following command to delete all the Metallb related clusterrolebindings. 
      kubectl get clusterrolebindings | grep metallb
      capv@wc-dev-master-control-plane-fcg4g [ ~ ]$ kubectl get clusterrolebindings | grep metallb
metallb:controller          ClusterRole/metallb:controller                26m
metallb:speaker             ClusterRole/metallb:speaker                   26m
 
capv@wc-dev-master-control-plane-fcg4g [ ~ ]$ kubectl delete clusterrolebinding metallb:controller
clusterrolebinding.rbac.authorization.k8s.io "metallb:controller" deleted
 
capv@wc-dev-master-control-plane-fcg4g [ ~ ]$ kubectl delete clusterrolebinding metallb:speaker
clusterrolebinding.rbac.authorization.k8s.io "metallb:speaker" deleted
    4. Run the following command to delete all the Metallb related clusterroles. 
      kubectl get clusterrole | grep metallb
      capv@wc-dev-master-control-plane-fcg4g [ ~ ]$ kubectl get clusterrole | grep metallb
metallb:controller              2023-03-25T17:32:54Z
metallb:speaker                 2023-03-25T17:32:54Z
 
capv@wc-dev-master-control-plane-fcg4g [ ~ ]$ kubectl delete clusterrole metallb:controller
clusterrole.rbac.authorization.k8s.io "metallb:controller" deleted
 
capv@wc-dev-master-control-plane-fcg4g [ ~ ]$ kubectl delete clusterrole metallb:speaker
clusterrole.rbac.authorization.k8s.io "metallb:speaker" deleted
    5. Run the following command to delete the webhook for metallb. 
      capv@wc-dev-master-control-plane-fcg4g [ ~ ]$ kubectl get validatingwebhookconfiguration
NAME                            WEBHOOKS   AGE
metallb-webhook-configuration   7          32m
nodeconfig-validator            1          73d
 
 
capv@wc-dev-master-control-plane-fcg4g [ ~ ]$ kubectl delete validatingwebhookconfiguration metallb-webhook-configuration
validatingwebhookconfiguration.admissionregistration.k8s.io "metallb-webhook-configuration" deleted