Update DuckDNS subdomain with dynamic IP

roles/base/tasks/duckdns.yml

@@ -0,0 +1,11 @@
+- name: Install DuckDNS script
+  template:
+    src: duckdns.sh.j2
+    dest: /usr/local/bin/update-duckdns
+    mode: 0700
+
+- name: Install DuckDNS cron
+  cron:
+    name: Update DuckDNS
+    minute: "*/5"
+    job: /usr/local/bin/update-duckdns

roles/base/tasks/main.yml

@@ -7,3 +7,7 @@
 - import_tasks: network.yml
   tags: network
   when: manage_network
+
+- import_tasks: duckdns.yml
+  tags: duckdns
+  when: duckdns is defined

roles/base/templates/duckdns.sh.j2

@@ -0,0 +1,20 @@
+#!/bin/bash
+
+domains="{{ duckdns.domains }}"
+token="{{ duckdns.token }}"
+{% if duckdns.logfile is undefined -%}
+  log="/var/log/duckdns.log"
+{% else -%}
+  log="{{ duckdns.logfile }}"
+{% endif %}
+
+url="https://www.duckdns.org/update?domains=$domains&token=$token&ip="
+
+time=$(date '+%Y%m%d-%H%M%S')
+result=$(curl $url)
+
+if [ "$result" = "OK" ];  then
+  echo "[$time] OK" >> $log
+else
+  echo "[$time] ERROR: $result" >> $log
+fi