Cleaning up your cluster is straightforward if you preserved the
metadata.json file from cluster creation. It is usually possible to
reconstruct the file if you lose it, but that depends on still having
a functioning cluster or poking around in AWS, so it's better to just
hang on to the file.
Also, if you added an EC2 instance to your VPC in order to be able to SSH into the cluster, make sure that you manually delete it first before attempting to delete your cluster. Our instructions did not provide sufficient detail to ensure that the installer could "find" the EC2 instance in order to delete it. Failing to manually delete the EC2 instance you manually created will result in the deletion of your cluster hanging and never completing.
The following command will read metadata.json and remove the
OpenShift 4 cluster and all underlying AWS resources that were created
by the installer:
./openshift-install destroy cluster
As with create, you can set --dir to use an asset directory other
than your current working directory. You should use the same asset
directory for destroy that you used for create.