From 20942f8f4b1ad9e068e3db77ef5d80be3257023f Mon Sep 17 00:00:00 2001
From: Stefan Haun <tux@netz39.de>
Date: Wed, 3 Aug 2022 20:19:09 +0200
Subject: [PATCH] Add role dd24-dyndns-cron

Setup cron job to call curl for DynDNS update
---
 roles/dd24-dyndns-cron/defaults/main.yml       |  5 +++++
 roles/dd24-dyndns-cron/handlers/main.yml       | 10 ++++++++++
 roles/dd24-dyndns-cron/tasks/main.yml          | 18 ++++++++++++++++++
 .../templates/dd24-dyndns.cron.j2              |  6 ++++++
 4 files changed, 39 insertions(+)
 create mode 100644 roles/dd24-dyndns-cron/defaults/main.yml
 create mode 100644 roles/dd24-dyndns-cron/handlers/main.yml
 create mode 100644 roles/dd24-dyndns-cron/tasks/main.yml
 create mode 100644 roles/dd24-dyndns-cron/templates/dd24-dyndns.cron.j2

diff --git a/roles/dd24-dyndns-cron/defaults/main.yml b/roles/dd24-dyndns-cron/defaults/main.yml
new file mode 100644
index 0000000..0f9336d
--- /dev/null
+++ b/roles/dd24-dyndns-cron/defaults/main.yml
@@ -0,0 +1,5 @@
+# DD24 Cron configuration
+---
+dyndns_domain: www.example.com
+dyndns_password: yourpassword
+dyndns_ip: auto
diff --git a/roles/dd24-dyndns-cron/handlers/main.yml b/roles/dd24-dyndns-cron/handlers/main.yml
new file mode 100644
index 0000000..49c802c
--- /dev/null
+++ b/roles/dd24-dyndns-cron/handlers/main.yml
@@ -0,0 +1,10 @@
+# handlers file for cron-dd24-dyndns
+---
+- name: reload cron
+  ansible.builtin.shell:
+    cmd: service cron reload
+    warn: no
+# Use the shell call because the task sometimes has problems finding the service state
+#  service:
+#    name: cron
+#    state: restarted
diff --git a/roles/dd24-dyndns-cron/tasks/main.yml b/roles/dd24-dyndns-cron/tasks/main.yml
new file mode 100644
index 0000000..5060260
--- /dev/null
+++ b/roles/dd24-dyndns-cron/tasks/main.yml
@@ -0,0 +1,18 @@
+---
+- name: Make sure cron and curl are installed
+  apt:
+    name:
+      - cron
+      - curl
+    state: present
+
+- name: Setup cron file for DD24 updates
+  ansible.builtin.template:
+    src: "templates/dd24-dyndns.cron.j2"
+    dest: "/etc/cron.d/dd24-dyndns"
+    owner: root
+    group: root
+    mode: "0644"
+  notify: reload cron
+  # There is ansible.builtin.cron, but this makes configuration much
+  # more complicated, so we stick to the template.
diff --git a/roles/dd24-dyndns-cron/templates/dd24-dyndns.cron.j2 b/roles/dd24-dyndns-cron/templates/dd24-dyndns.cron.j2
new file mode 100644
index 0000000..e3119ab
--- /dev/null
+++ b/roles/dd24-dyndns-cron/templates/dd24-dyndns.cron.j2
@@ -0,0 +1,6 @@
+# /etc/cron.d/dd24-dyndns: Cron call to renew DynDNS entry
+
+SHELL=/bin/sh
+PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin
+
+*/5 * * * * root curl "https://dynamicdns.key-systems.net/update.php?hostname={{dyndns_domain}}&password={{dyndns_password}}&ip={{dyndns_ip}}" > /dev/null