Chapter 9. Uninstall Red Hat Openshift Container Storage

For Red Hat Openshift Container Storage, the OpenShift Container Platform Advanced Installer comes with a playbook to uninstall all resources and artifacts from the cluster. To use it,provide the original inventory file that was used to install the target instance of Red Hat Openshift Container Storage and run the following playbook:

Before uninstalling Openshift Container Storage, ensure all applications using Openshift Container Storage file and block physical volumes(PVs) are removed and all PVs are deleted. If this is not done nodes may continue to hold onto resources until they are rebooted.

Warning

This procedure will destroy data. Proceed with caution. 

ansible-playbook -i <path_to_inventory_file> /usr/share/ansible/openshift-ansible/playbooks/openshift-glusterfs/uninstall.yml

In addition, the playbook supports the use of a variable called openshift_storage_glusterfs_wipe which, when enabled, will destroy any data on the block devices that were used for Red Hat Gluster Storage backend storage. For more information about the settings/variables that will be destroyed, see Appendix B, Settings that are destroyed when using uninstall playbook. It is recommended to use this variable in the following format: 

ansible-playbook -i <path_to_inventory_file> -e "openshift_storage_glusterfs_wipe=true" /usr/share/ansible/openshift-ansible/playbooks/openshift-glusterfs/uninstall.yml
Note
  • If gluster-block is uninstalled, ensure that the entries corresponding to gluster-block in /etc/target/saveconfig.json is removed. It is possible that the configuration file may contain entries other than gluster-block and hence it is required to remove the gluster-block entries manually.
  • Log out of all the dangling iqns from all the initiators after an OCS uninstall.