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docs/configuring-playbook-dynamic-dns.md

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+# Dynamic DNS
+
+## Setup
+
+Most cloud providers / ISPs will charge you extra for a static IP address. If you're
+not hosting a highly reliable homeserver you can workaround this via dynamic DNS. To
+set this up, you'll need to get the username/password from your DNS provider. For
+google domains, this process is described [here](https://support.google.com/domains/answer/6147083).
+After you've gotten the proper credentials you can add the following config to your `inventory/host_vars/matrix.DOMAIN/vars.yml`:
+
+```yaml
+matrix_dynamic_dns_enabled: true
+
+matrix_dynamic_dns_domain_configurations:
+  - provider: domains.google.com
+    protocol: dyndn2
+    username: XXXXXXXXXXXXXXXX
+    password: XXXXXXXXXXXXXXXX
+    domain: "{{ matrix_domain }}"
+```
+
+
+## Additional Reading
+
+Additional resources:
+
+- https://matrix.org/docs/guides/free-small-matrix-server