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Uninstallation Guide - OCI (4.2)

Uninstallation Guide - OCI (4.2)

These uninstallation steps must be performed in sequence to ensure that all resources are being removed systematically.

Usage Engine Private Edition

Wait for few minutes for the External-DNS to cleanup OCI DNS hosted zone records. All records deleted except SOA and NS records.

Hint!

To monitor the hosted zone records cleanup, refresh the OCI DNS console, Networking | DNS Management | Zones | Public zones section.

Kubernetes Cluster Add-ons

To uninstall Add-ons from the Kubernetes cluster, run:

helm uninstall oci-native-ingress-controller -n uepe
helm uninstall external-dns -n uepe
helm uninstall ingress-nginx -n uepe

Cert Manager

To uninstall cert-manager-webhook-oci from the Kubernetes cluster, run:

helm uninstall cert-manager-webhook-oci -n cert-manager

cert-manager needs to be uninstalled manually under name-space cert-manager as it was added to the cluster via OCI Cluster add-ons.

kubectl delete deploy cert-manager-webhook -n cert-manager
kubectl delete deploy cert-manager-cainjector -n cert-manager
kubectl delete deploy cert-manager -n cert-manager
kubectl delete service cert-manager-webhook -n cert-manager
kubectl delete service cert-manager -n cert-manager
kubectl delete service cert-manager-cainjector -n cert-manager

OCI Resources

Manually delete unused load balancer Certificates and CA Bundles from the OCI Certificate Service via the OCI console.

Delete Persistent Volume Claim (PVC) and Persistent Volume (PV) if they had been created before.

kubectl delete -f pvc.yaml -n uepe
kubectl delete -f pv.yaml

Change directory to the terraform script directory and run the following command to remove all OCI resources created (cluster, Virtual Cloud Networks, persistent storage etc):

terraform destroy

Note!

For supporting ssl through kubernetes secrets, respective certificates and ca bundles are generated in certificate service. Terraform destroy doesn't delete these certificates and ca bundles. Therefore, these certificates and ca bundles need to be cleared by the user manually via the OCI console's Certificate service. Go to Certificates | Certificates and Certificates | CA Bundles to clear it.