feat(server/ddns): implement DDNS support using inadyn

Signed-off-by: Matej Focko <me@mfocko.xyz>

roles/server/ddns/files/ddns.service

@@ -0,0 +1,7 @@
+[Unit]
+Description=Run inadyn in a container to update DNS
+After=network.target
+
+[Service]
+Type=oneshot
+ExecStart=podman run --rm -v "/etc/inadyn.conf:/etc/inadyn.conf" -v "/var/cache/inadyn:/var/cache/inadyn" docker.io/troglobit/inadyn:latest -1 --cache-dir=/var/cache/inadyn

roles/server/ddns/files/ddns.timer

@@ -0,0 +1,10 @@
+[Unit]
+Description=Run inadyn every 15 minutes
+
+[Timer]
+OnCalendar=*:00,15,30,45:00
+RandomizedDelaySec=1h
+Persistent=true
+
+[Install]
+WantedBy=timers.target

roles/server/ddns/tasks/main.yml

@@ -0,0 +1,34 @@
+---
+- name: Install the config file
+  ansible.builtin.template:
+    src: templates/inadyn.conf
+    dest: /etc/inadyn.conf
+    mode: 0600
+    owner: root
+    group: root
+
+- name: Create the cache directory
+  ansible.builtin.file:
+    path: /var/cache/inadyn
+    state: directory
+    mode: 0700
+    owner: root
+    group: root
+
+- name: Install the unit files
+  ansible.builtin.copy:
+    src: files/{{ item }}
+    dest: /etc/systemd/system/{{ item }}
+    mode: 0644
+    owner: root
+    group: root
+  loop:
+    - ddns.service
+    - ddns.timer
+
+- name: Enable the timer
+  ansible.builtin.systemd_service:
+    daemon_reload: true
+    enabled: true
+    name: ddns.timer
+    state: "started"

roles/server/ddns/templates/inadyn.conf

@@ -0,0 +1,15 @@
+period     = 300
+allow-ipv6 = true
+
+provider cloudflare.com:1 {
+    username = mfocko.xyz
+    password = {{ cloudflare_token }}
+    hostname = mountainside.mfocko.xyz
+}
+
+provider cloudflare.com:2 {
+    username = mfocko.xyz
+    password = {{ cloudflare_token }}
+    hostname = mountainside.mfocko.xyz
+    wildcard = true
+}