Set up ddclient

mounts/ddclient/config/ddclient.conf.tpl

@@ -0,0 +1,19 @@
+daemon=300              # check every 300 seconds
+syslog=yes              # log update msgs to syslog
+pid=/var/run/ddclient/ddclient.pid # record PID in file.
+ssl=yes                 # use ssl-support.  Works with
+                        # ssl-library
+postscript=/data/postscript_gotify.sh # run script after updating.  The
+                        # new IP is added as argument.
+
+usev4=webv4
+
+##
+## CloudFlare (www.cloudflare.com)
+##
+protocol=cloudflare,       \
+zone=dedicated.contact,    \
+ttl=1,                     \
+login=token,               \
+password=$CLOUDFLARE_TOKEN \
+$CLOUDFLARE_DOMAIN

mounts/ddclient/data/.gitignore

@@ -0,0 +1,2 @@
+!entrypoint.sh
+!postscript_gotify.sh

mounts/ddclient/data/entrypoint.sh

@@ -0,0 +1,33 @@
+#!/bin/bash
+
+# usage: file_env VAR [DEFAULT]
+#    ie: file_env 'XYZ_DB_PASSWORD' 'example'
+# (will allow for "$XYZ_DB_PASSWORD_FILE" to fill in the value of
+#  "$XYZ_DB_PASSWORD" from a file, especially for Docker's secrets feature)
+file_env() {
+	local var="$1"
+	local fileVar="${var}_FILE"
+	local def="${2:-}"
+	if [ "${!var:-}" ] && [ "${!fileVar:-}" ]; then
+		mysql_error "Both $var and $fileVar are set (but are exclusive)"
+	fi
+	local val="$def"
+	if [ "${!var:-}" ]; then
+		val="${!var}"
+	elif [ "${!fileVar:-}" ]; then
+		val="$(< "${!fileVar}")"
+	fi
+	export "$var"="$val"
+	unset "$fileVar"
+}
+
+cd /app
+
+
+apk add --update gettext
+
+file_env 'GOTIFY_TOKEN'
+file_env 'CLOUDFLARE_TOKEN'
+envsubst < /config/ddclient.conf.tpl > /config/ddclient.conf
+
+/init "$@"

mounts/ddclient/data/postscript_gotify.sh

@@ -0,0 +1,7 @@
+#!/bin/bash
+curl "$GOTIFY_ADDRESS/message" \
+    -X POST \
+    -H "X-Gotify-Key: $GOTIFY_TOKEN" \
+    -F "title=IP Address updated" \
+    -F "message=IP address detected as $1" \
+    -F "priority=5"

mounts/ddclient/secrets/README.md

@@ -0,0 +1,5 @@
+Contains the file `gotify_token`
+Loadded in the postscript_gotify.sh to send a notification when a new IP is found
+
+Contains the file `clourflare_token`
+Token required to access the DNS API of cloudflare

utilities.docker-compose.yml

@@ -10,7 +10,8 @@ services:
       - source: diun
         target: /etc/diun/
     secrets:
-      - gotify_token
+      - source: diun_gotify_token
+        target: gotify_token
     restart: unless-stopped
 
   smokeping:
@@ -27,6 +28,28 @@ services:
       traefik.enable: true
       traefik.http.routers.smokeping.rule: HostRegexp(`smokeping{subdomain:(\.[a-z0-9-]+)?}.dedicated.contact`)
 
+  ddclient:
+    image: linuxserver/ddclient
+    environment:
+      GOTIFY_ADDRESS: http://gotify
+      GOTIFY_TOKEN_FILE: /run/secrets/gotify_token
+      CLOUDFLARE_DOMAIN: ${DDCLIENT_CLOUDFLARE_DOMAIN-dev.dedicated.contact}
+      CLOUDFLARE_TOKEN_FILE: /run/secrets/cloudflare_token
+    networks:
+      - gotify
+    volumes:
+      - ddclient:/config
+      - smokeping-data:/data
+    configs:
+      - source: ddclient
+        target: /config/
+    secrets:
+      - source: ddclient_gotify_token
+        target: gotify_token
+      - source: ddclient_cloudflare_token
+        target: cloudflare_token
+    restart: unless-stopped
+
 networks:
   docker:
     external: true
@@ -46,13 +69,24 @@ volumes:
       type: none
       o: bind
       device: ${MOUNT_DIR?}/smokeping/data/
+  ddclient:
+    driver_opts:
+      type: none
+      o: bind
+      device: ${MOUNT_DIR?}/ddclient/data/
 
 configs:
   diun:
     file: ${MOUNT_DIR?}/diun/config/
 #  smokeping:
 #    file: ${MOUNT_DIR?}/smokeping/config/
+  ddclient:
+    file: ${MOUNT_DIR?}/ddclient/config/
 
 secrets:
-  gotify_token:
+  diun_gotify_token:
     file: ${MOUNT_DIR?}/diun/secrets/gotify_token
+  ddclient_gotify_token:
+    file: ${MOUNT_DIR?}/ddclient/secrets/gotify_token
+  ddclient_cloudflare_token:
+    file: ${MOUNT_DIR?}/ddclient/secrets/cloudflare_token