auto db backup script

config/mysql/Dockerfile

@@ -0,0 +1,10 @@
+FROM mysql:5
+ENV force_color_prompt yes
+
+RUN apt-get update;
+RUN apt-get install -y cron;
+
+ENTRYPOINT \
+  service cron start; \
+  printenv | grep -v "no_proxy" >> /etc/environment; \
+  docker-entrypoint.sh mysqld

config/mysql/backup-script

@@ -0,0 +1,28 @@
+#!/bin/sh
+
+FREQUENTY=`basename "$0"`
+TIMESTAMP=$(date +"%Y-%m-%d")
+
+case $FREQUENTY in
+
+  daily)
+    DAYS=6
+    ;;
+
+  weekly)
+    DAYS=30
+    find /backups -type f -name $TIMESTAMP-daily.sql.gz -delete
+    ;;
+
+  monthly)
+    DAYS=122
+    find /backups -type f -name $TIMESTAMP-weekly.sql.gz -delete
+    ;;
+esac
+
+mysqldump -u ${MYSQL_USER} -p${MYSQL_PASSWORD} ${MYSQL_DATABASE} | gzip > /backups/$TIMESTAMP-$FREQUENTY.sql.gz
+
+# Remove old backups
+find /backups -mtime +${DAYS} -type f -name *-$FREQUENTY.sql.gz -delete
+
+exit 0;