Include a trivial example of how to run locmap from openstack create command.

I picked an image date on purpose that does exist to force people to think about what they are doing.

docs/centos8/docs/locmap.md

@@ -54,3 +54,15 @@ You can disable a module:
 ```bash
 # locmap --disable modulename
 ```
+
+### Locmap and Openstack
+It easy to run locmap during an openstack installation. Create a script with the above commands say `install.sh`. Pass this as user data to `openstack create`.
+
+```
+openstack server create --image 'CS8 - x86_64 [2021-08-10]' --key-name <mykey> --user-data ~/tmp/install.sh  --flavor m2.small mynode
+```
+
+alternativly the script can be uploaded the configuration tab of "Lauch Instance' panel of openstack horizon.
+
+
+