Chapter 10. Uninstalling a cluster on RHOSP from your own infrastructure You can remove a cluster that you deployed to Red Hat OpenStack Platform (RHOSP) on user-provisioned infrastructure. 10.1. Downloading playbook dependencies The Ansible playbooks that simplify the removal process on user-provisioned infrastructure require several Python modules. On the machine where you will run the process, add the modules' repositories and then download them. Note These instructions assume that you are using Red Hat Enterprise Linux (RHEL) 8. Prerequisites Python 3 is installed on your machine. Procedure On a command line, add the repositories: Register with Red Hat Subscription Manager: USD sudo subscription-manager register # If not done already Pull the latest subscription data: USD sudo subscription-manager attach --pool=USDYOUR_POOLID # If not done already Disable the current repositories: USD sudo subscription-manager repos --disable=* # If not done already Add the required repositories: USD sudo subscription-manager repos \ --enable=rhel-8-for-x86_64-baseos-rpms \ --enable=openstack-16-tools-for-rhel-8-x86_64-rpms \ --enable=ansible-2.9-for-rhel-8-x86_64-rpms \ --enable=rhel-8-for-x86_64-appstream-rpms Install the modules: USD sudo yum install python3-openstackclient ansible python3-openstacksdk Ensure that the python command points to python3 : USD sudo alternatives --set python /usr/bin/python3 10.2. Removing a cluster from RHOSP that uses your own infrastructure You can remove an OpenShift Container Platform cluster on Red Hat OpenStack Platform (RHOSP) that uses your own infrastructure. To complete the removal process quickly, run several Ansible playbooks. Prerequisites Python 3 is installed on your machine. You downloaded the modules in "Downloading playbook dependencies." You have the playbooks that you used to install the cluster. You modified the playbooks that are prefixed with down- to reflect any changes that you made to their corresponding installation playbooks. For example, changes to the bootstrap.yaml file are reflected in the down-bootstrap.yaml file. All of the playbooks are in a common directory. Procedure On a command line, run the playbooks that you downloaded: USD ansible-playbook -i inventory.yaml \ down-bootstrap.yaml \ down-control-plane.yaml \ down-compute-nodes.yaml \ down-load-balancers.yaml \ down-network.yaml \ down-security-groups.yaml Remove any DNS record changes you made for the OpenShift Container Platform installation. OpenShift Container Platform is removed from your infrastructure.

Commands:
sudo subscription-manager register # If not done already
sudo subscription-manager attach --pool=USDYOUR_POOLID # If not done already
sudo subscription-manager repos --disable=* # If not done already
sudo subscription-manager repos --enable=rhel-8-for-x86_64-baseos-rpms --enable=openstack-16-tools-for-rhel-8-x86_64-rpms --enable=ansible-2.9-for-rhel-8-x86_64-rpms --enable=rhel-8-for-x86_64-appstream-rpms
sudo yum install python3-openstackclient ansible python3-openstacksdk
sudo alternatives --set python /usr/bin/python3
ansible-playbook -i inventory.yaml down-bootstrap.yaml down-control-plane.yaml down-compute-nodes.yaml down-load-balancers.yaml down-network.yaml down-security-groups.yaml