Update configuring-playbook-dynamic-dns.md

Reuse 75e264f538/docs/services/ddclient.md

Signed-off-by: Suguru Hirahara <did🔑z6MkvVZk1A3KBApWJXv2Ju4H14ErDfRGxh8zxdXSZ4vACDg5>

docs/configuring-playbook-dynamic-dns.md

@@ -1,7 +1,20 @@
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 SPDX-FileCopyrightText: 2020 Scott Crossen
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@@ -12,6 +25,10 @@ The playbook can configure Dynamic DNS with [ddclient⁠](https://github.com/ddc
 
 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.
 
+For details about configuring the [Ansible role for ddclient](https://github.com/mother-of-all-self-hosting/ansible-role-ddclient), you can check them via:
+- 🌐 [the role's documentation](https://github.com/mother-of-all-self-hosting/ansible-role-ddclient/blob/main/docs/configuring-ddclient.md) online
+- 📁 `roles/galaxy/ddclient/docs/configuring-ddclient.md` locally, if you have [fetched the Ansible roles](../installing.md)
+
 ## Prerequisite
 
 You'll need to authenticate with your DNS provider somehow, in most cases this is simply a username and password but can differ from provider to provider. Please consult with your providers documentation and the upstream [ddclient documentation](https://github.com/ddclient/ddclient/blob/main/ddclient.conf.in) to determine what you'll need to provide to authenticate.
@@ -33,6 +50,12 @@ ddclient_domain_configurations:
 
 Keep in mind that certain providers may require a different configuration of the `ddclient_domain_configurations` variable, for provider specific examples see the [upstream documentation](https://github.com/ddclient/ddclient/blob/main/ddclient.conf.in).
 
+### Configuring the endpoint to obtain IP address (optional)
+
+The playbook sets the default endpoint for obtaining the IP address to `https://cloudflare.com/cdn-cgi/trace`. You can replace it by specifying yours to `ddclient_web` and `ddclient_web_skip` if necessary.
+
+Refer to [this section](https://github.com/mother-of-all-self-hosting/ansible-role-ddclient/blob/main/docs/configuring-ddclient.md#setting-the-endpoint-to-obtain-ip-address-optional) for more information.
+
 ### Extending the configuration
 
 There are some additional things you may wish to configure about the component.
@@ -63,4 +86,4 @@ Additional resources:
 
 ## Troubleshooting
 
-As with all other services, you can find the logs in [systemd-journald](https://www.freedesktop.org/software/systemd/man/systemd-journald.service.html) by logging in to the server with SSH and running `journalctl -fu matrix-dynamic-dns`. However, due to an [upstream issue](https://github.com/linuxserver/docker-ddclient/issues/54#issuecomment-1153143132) the logging output is not always complete. For advanced debugging purposes running the `ddclient` tool outside of the container is useful via the following: `ddclient -file ./ddclient.conf -daemon=0 -debug -verbose -noquiet`.
+See [this section](https://github.com/mother-of-all-self-hosting/ansible-role-ddclient/blob/main/docs/configuring-ddclient.md#troubleshooting) on the role's documentation for details.