Add mariadb addon

mariadb/Dockerfile

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+FROM %%BASE_IMAGE%%
+
+# Add env
+ENV LANG C.UTF-8
+
+# Setup base
+RUN apk add --no-cache jq mariadb mariadb-client
+
+# Copy data
+COPY run.sh /
+RUN chmod a+x /run.sh
+
+CMD [ "/run.sh" ]

mariadb/config.json

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+{
+  "name": "MariaDB",
+  "version": "0.1",
+  "slug": "mariadb",
+  "description": "MariaDB Server is one of the most popular database servers in the world.",
+  "url": "https://home-assistant.io/addons/mariadb/",
+  "startup": "before",
+  "boot": "auto",
+  "network": {
+    "tcp/3306": 3306
+  },
+  "options": {
+    "databases": ["homeassistant"]
+  },
+  "schema": {
+    "databases": ["str"]
+  },
+  "image": "homeassistant/{arch}-addon-mariadb"
+}

mariadb/run.sh

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+#!/bin/bash
+set -e
+
+CONFIG_PATH=/data/options.json
+MARIADB_DATA=/data/databases
+
+DATABASES=$(jq --raw-output ".databases[]" $CONFIG_PATH)
+
+# Init mariadb
+if [ ! -d "$MARIADB_DATA" ]; then
+    echo "[INFO] Create a new mariadb initial system"
+    mysql_install_db --user=root --datadir="$MARIADB_DATA" > /dev/null
+else
+    echo "[INFO] Use exists mariadb initial system"
+fi
+
+# Start mariadb
+echo "[INFO] Start MariaDB"
+mysqld_safe --datadir="$MARIADB_DATA" --user=root < /dev/null &
+MARIADB_PID=$!
+
+# Wait until DB is running
+while ! mysql -e 2> /dev/null; do
+    sleep 1
+done
+
+# Init databases
+for line in $DATABASES; do
+    mysql -e "CREATE DATABASE $line;" 2> /dev/null || true
+done
+
+wait "$MARIADB_PID"