allow uninstalling AWS objects created by prerequisite playbook

add deprovisioners/uninstallers for objects created via playbooks/aws/openshift-cluster/prerequisites.yml

specifically: security groups, vpcs, and any ssh keys

introduce openshift_aws_enable_uninstall_shared_objects to protect AWS objects that would be shared in the case of multiple clusters co-existing in one AWS account. right now it protects the ssh keys, but it can/should be used to protect against deleting the shared IAM instance profile as well. default this variable to False to be on the safe side when uninstalling/deprovisioning.

add some documentation on using deprovisioning playbooks

1 files changed, 14 insertions, 0 deletions

diff --git a/playbooks/aws/README.md b/playbooks/aws/README.md
index d203b9cda..bdc98d1e0 100644
--- a/playbooks/aws/README.md
+++ b/playbooks/aws/README.md
@@ -198,3 +198,17 @@ At this point your cluster should be ready for workloads.  Proceed to deploy app
 ### Still to come
 
 There are more enhancements that are arriving for provisioning.  These will include more playbooks that enhance the provisioning capabilities.
+
+## Uninstall / Deprovisioning
+
+At this time, only deprovisioning of the output of the prerequisites step is provided. You can/must manually remove things like ELBs and scale groups before attempting to undo the work by the preprovisiong step.
+
+To undo the work done by the prerequisites playbook, simply call the uninstall_prerequisites.yml playbook. You should use the same inventory file and provisioning_vars.yml file that was used during provisioning.
+
+```
+ansible-playbook -i <previous inventory file> -e @<previous provisioning_vars file> uninstall_prerequisites.yml
+```
+
+This should result in removal of the security groups and VPC that were created.
+
+NOTE: If you want to also remove the ssh keys that were uploaded (**these ssh keys would be shared if you are running multiple clusters in the same AWS account** so we don't remove these by default) then you should add 'openshift_aws_enable_uninstall_shared_objects: True' to your provisioning_vars.yml file.