Update the DigitalOcean dynamic inventory script from Ansible upstream.

dynamic-inventory/digitalocean/README.md

@@ -7,7 +7,7 @@ Chapter 7 of [Ansible for DevOps](https://www.ansiblefordevops.com/) contains de
 Examples using Ansible's DigitalOcean integration are contained within this directory.
 
   - `provision.yml` contains an example of provisioning a new DigitalOcean droplet, then immediately configuring it with Ansible.
-  - `digital_ocean.py` is the DigitalOcean dynamic inventory script included with Ansible. Don't use this copy; get a fresh, up-to-date copy from the Ansible project instead.
+  - `digital_ocean.py` (and `digital_ocean.ini`) is the DigitalOcean dynamic inventory script included with Ansible. Don't use this copy; get the latest version from the Ansible project: [digital_ocean.py](https://github.com/ansible/ansible/blob/devel/contrib/inventory/digital_ocean.py).
 
 Before you can use either of these examples, you will need to set an environment variable with your DigitalOcean API Personal Access Token:
 

dynamic-inventory/digitalocean/digital_ocean.ini

@@ -0,0 +1,34 @@
+# Ansible DigitalOcean external inventory script settings
+#
+
+[digital_ocean]
+
+# The module needs your DigitalOcean API Token.
+# It may also be specified on the command line via --api-token
+# or via the environment variables DO_API_TOKEN or DO_API_KEY
+#
+#api_token = 123456abcdefg
+
+
+# API calls to DigitalOcean may be slow. For this reason, we cache the results
+# of an API call. Set this to the path you want cache files to be written to.
+# One file will be written to this directory:
+#   - ansible-digital_ocean.cache
+#
+cache_path = /tmp
+
+
+# The number of seconds a cache file is considered valid. After this many
+# seconds, a new API call will be made, and the cache file will be updated.
+#
+cache_max_age = 300
+
+# Use the private network IP address instead of the public when available.
+#
+use_private_network = False
+
+# Pass variables to every group, e.g.:
+#
+#   group_variables = { 'ansible_user': 'root' }
+#
+group_variables = {}