✨ Automatically use and discovery MySQL service

traccar/Dockerfile

@@ -14,9 +14,11 @@ WORKDIR /opt/traccar
 # Setup base
 RUN \
     apk add --no-cache \
+        mariadb-client=10.4.12-r0 \
         nginx=1.16.1-r6 \
         nss=3.48-r0 \
         openjdk8-jre=8.242.08-r0 \
+        xmlstarlet=1.6.1-r0 \
     \
     && curl -J -L -o /tmp/traccar.zip \
       "https://github.com/traccar/traccar/releases/download/v4.8/traccar-other-4.8.zip" \

traccar/config.json

@@ -21,6 +21,7 @@
     "80/tcp": "Web interface (Not required for Ingress)"
   },
   "map": ["config:rw", "ssl"],
+  "services": ["mysql:want"],
   "options": {
     "ssl": true,
     "certfile": "fullchain.pem",

traccar/rootfs/etc/cont-init.d/mysql.sh

@@ -0,0 +1,53 @@
+#!/usr/bin/with-contenv bashio
+# ==============================================================================
+# Home Assistant Community Add-on: Traccar
+# Pre-configures the MySQL clients, if the service is available
+# ==============================================================================
+readonly CONFIG="/etc/traccar/hassio.xml"
+declare host
+declare password
+declare port
+declare username
+declare url
+
+if bashio::services.available "mysql"; then
+  host=$(bashio::services "mysql" "host")
+  password=$(bashio::services "mysql" "password")
+  port=$(bashio::services "mysql" "port")
+  username=$(bashio::services "mysql" "username")
+
+  # Create database if not exists
+  echo "CREATE DATABASE IF NOT EXISTS traccar;" \
+    | mysql -h "${host}" -P "${port}" -u "${username}" -p"${password}"
+
+  # Update Traccar XML configuration for database
+  xmlstarlet ed -L -s /properties \
+    -t elem -n entry_placeholder -v "com.mysql.jdbc.Driver" \
+      -i //entry_placeholder -t attr -n "key" -v "database.driver" \
+    -r //entry_placeholder -v entry \
+    "${CONFIG}"
+
+  url="jdbc:mysql://${host}:${port}/traccar?serverTimezone=UTC&useSSL=false&allowMultiQueries=true&autoReconnect=true&useUnicode=yes&characterEncoding=UTF-8&sessionVariables=sql_mode=''"
+  xmlstarlet ed -L -s /properties \
+    -t elem -n entry_placeholder -v "${url}" \
+      -i //entry_placeholder -t attr -n "key" -v "database.url" \
+    -r //entry_placeholder -v entry \
+    "${CONFIG}"
+
+  xmlstarlet ed -L -s /properties \
+    -t elem -n entry_placeholder -v "${username}" \
+      -i //entry_placeholder -t attr -n "key" -v "database.user" \
+    -r //entry_placeholder -v entry \
+    "${CONFIG}"
+
+  xmlstarlet ed -L -s /properties \
+    -t elem -n entry_placeholder -v "${password}" \
+      -i //entry_placeholder -t attr -n "key" -v "database.password" \
+    -r //entry_placeholder -v entry \
+    "${CONFIG}"
+else
+  bashio::log.warning "Traccar is using the internal H2 default database!"
+  bashio::log.warning "THIS IS NOT RECOMMENDED!!!"
+  bashio::log.warning "Please install the official MariaDB add-on, to ensure"
+  bashio::log.warning "you are using a solid database for Traccar."
+fi