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Uninstalling a cluster on AWS

Removing a cluster that uses installer-provisioned infrastructure

You can remove a cluster that uses installer-provisioned infrastructure from your cloud.

After uninstallation, check your cloud provider for any resources not removed properly, especially with User Provisioned Infrastructure (UPI) clusters. There might be resources that the installer did not create or that the installer is unable to access.
Prerequisites

  • You have a copy of the installation program that you used to deploy the cluster.

  • You have the files that the installation program generated when you created your cluster.

Procedure

  1. On the computer that you used to install the cluster, go to the directory that contains the installation program, and run the following command:

    $ ./openshift-install destroy cluster \
--dir <installation_directory> --log-level info  (1) (2)
    1 For <installation_directory>, specify the path to the directory that you stored the installation files in.
    2 To view different details, specify warn, debug, or error instead of info.

    You must specify the directory that contains the cluster definition files for your cluster. The installation program requires the metadata.json file in this directory to delete the cluster.

  2. Optional: Delete the <installation_directory> directory and the OpenShift Container Platform installation program.

Deleting AWS resources with the Cloud Credential Operator utility

To clean up resources after uninstalling an OpenShift Container Platform cluster with the Cloud Credential Operator (CCO) in manual mode with STS, you can use the CCO utility (ccoctl) to remove the AWS resources that ccoctl created during installation.

Prerequisites

  • Extract and prepare the ccoctl binary.

  • Install an OpenShift Container Platform cluster with the CCO in manual mode with STS.

Procedure

  • Delete the AWS resources that ccoctl created:

    $ ccoctl aws delete \
  --name=<name> \ (1)
  --region=<aws_region> (2)
    1 <name> matches the name that was originally used to create and tag the cloud resources.
    2 <aws_region> is the AWS region in which to delete cloud resources.
    Example output:
    2021/04/08 17:50:41 Identity Provider object .well-known/openid-configuration deleted from the bucket <name>-oidc
2021/04/08 17:50:42 Identity Provider object keys.json deleted from the bucket <name>-oidc
2021/04/08 17:50:43 Identity Provider bucket <name>-oidc deleted
2021/04/08 17:51:05 Policy <name>-openshift-cloud-credential-operator-cloud-credential-o associated with IAM Role <name>-openshift-cloud-credential-operator-cloud-credential-o deleted
2021/04/08 17:51:05 IAM Role <name>-openshift-cloud-credential-operator-cloud-credential-o deleted
2021/04/08 17:51:07 Policy <name>-openshift-cluster-csi-drivers-ebs-cloud-credentials associated with IAM Role <name>-openshift-cluster-csi-drivers-ebs-cloud-credentials deleted
2021/04/08 17:51:07 IAM Role <name>-openshift-cluster-csi-drivers-ebs-cloud-credentials deleted
2021/04/08 17:51:08 Policy <name>-openshift-image-registry-installer-cloud-credentials associated with IAM Role <name>-openshift-image-registry-installer-cloud-credentials deleted
2021/04/08 17:51:08 IAM Role <name>-openshift-image-registry-installer-cloud-credentials deleted
2021/04/08 17:51:09 Policy <name>-openshift-ingress-operator-cloud-credentials associated with IAM Role <name>-openshift-ingress-operator-cloud-credentials deleted
2021/04/08 17:51:10 IAM Role <name>-openshift-ingress-operator-cloud-credentials deleted
2021/04/08 17:51:11 Policy <name>-openshift-machine-api-aws-cloud-credentials associated with IAM Role <name>-openshift-machine-api-aws-cloud-credentials deleted
2021/04/08 17:51:11 IAM Role <name>-openshift-machine-api-aws-cloud-credentials deleted
2021/04/08 17:51:39 Identity Provider with ARN arn:aws:iam::<aws_account_id>:oidc-provider/<name>-oidc.s3.<aws_region>.amazonaws.com deleted
Verification

  • To verify that the resources are deleted, query AWS. For more information, refer to AWS documentation.