Add a cron mysqldump image

.gitignore

@@ -30,6 +30,9 @@ lib*.prl
 lib*.a
 lib*.prl
 
+*.sql
+
 # FIXME: Why are these files created?
 \\
 */target_wrapper.sh
+

backups/README.md

@@ -0,0 +1,2 @@
+This directory contains the backups for the MySQL database.
+

docker-compose.yml

@@ -5,6 +5,21 @@ version: '3'
 
 services:
 
+  cron:
+    build: ./mysqldump
+    # image: schnitzler/mysqldump
+    restart: always
+    volumes:
+      - ./mysqldump/crontab:/var/spool/cron/crontabs/root
+      - ./mysqldump/backup.sh:/usr/local/bin/backup.sh
+      - ./backups:/backups
+    command: ["-l", "8", "-d", "8"]
+    environment:
+      MYSQL_HOST: 'db'
+      MYSQL_USER: 'admin'
+      MYSQL_PASSWORD: 'secret'
+      MYSQL_DATABASE: 'mpop_database'
+
   phpmyadmin:
     image: phpmyadmin/phpmyadmin
     environment:

mysqldump/Dockerfile

@@ -0,0 +1,5 @@
+FROM alpine:3.9
+
+RUN apk add --no-cache mysql-client
+ENTRYPOINT ["crond", "-f"]
+

mysqldump/backup.sh

@@ -0,0 +1,13 @@
+#!/bin/bash
+
+FILENAME=${MYSQL_DATABASE}-$(date +%Y-%m-%d_%Hh%Mm%S).sql
+
+set -o verbose
+
+mysqldump \
+  --host=${MYSQL_HOST} \
+  --user=${MYSQL_USER} \
+  --password=${MYSQL_PASSWORD} \
+  --lock-tables=false \
+  ${MYSQL_DATABASE} > /backups/${FILENAME}
+

mysqldump/crontab

@@ -0,0 +1,4 @@
+#minute hour    day     month   week    command
+#0       0       *       *       *       /usr/local/bin/backup.sh
+*       *       *       *       *       /usr/local/bin/backup.sh
+