split docker images into different repos

Dockerfile

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+FROM alpine
+MAINTAINER Fco. Javier Delgado del Hoyo <frandelhoyo@gmail.com>
+
+RUN apk add --update bash mysql-client gzip && rm -rf /var/cache/apk/* && mkdir /backup
+
+ENV CRON_TIME="0 3 * * sun" \
+    MYSQL_HOST="mysql" \
+    MYSQL_PORT="3306"
+
+COPY run.sh /run.sh
+COPY backup.sh /backup.sh
+COPY restore.sh /restore.sh
+RUN chmod +x /backup.sh /restore.sh
+
+VOLUME ["/backup"]
+
+CMD ["/run.sh"]

LICENSE

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README.md

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+# mysql-cron-backup
+
+This image runs mysqldump to backup database periodically using cron. Data is dumped to the container folder `/backup`
+
+## Usage:
+
+  docker run -d \
+    --env MYSQL_USER=admin \
+    --env MYSQL_PASS=password \
+    --link mysql
+    --volume /path/to/my/host/folder:/backup
+    fradelg/mysql-backup
+
+## Variables
+
+    MYSQL_HOST      the host/ip of your mysql database
+    MYSQL_PORT      the port number of your mysql database
+    MYSQL_USER      the username of your mysql database
+    MYSQL_PASS      the password of your mysql database
+    MYSQL_DB        the database name to dump. Default: `--all-databases`
+    CRON_TIME       the interval of cron job to run mysqldump. `0 0 * * *` by default, which is every day at 00:00
+    MAX_BACKUPS     the number of backups to keep. When reaching the limit, the old backup will be discarded. No limit by default
+    INIT_BACKUP     if set, create a backup when the container starts
+    INIT_RESTORE_LATEST if set, restores latest backup
+
+## Restore from a backup
+
+See the list of backups, you can run:
+
+    docker exec backup ls /backup
+
+To restore database from a certain backup, simply run:
+
+    docker exec backup /restore.sh /backup/2015.08.06.171901

backup.sh

@@ -0,0 +1,29 @@
+#!/bin/bash
+[ -z "${MYSQL_USER}" ] && { echo "=> MYSQL_USER cannot be empty" && exit 1; }
+[ -z "${MYSQL_PASS}" ] && { echo "=> MYSQL_PASS cannot be empty" && exit 1; }
+
+DATE=`date +%Y%m%d%H%M`
+echo "=> Backup started at $DATE"
+databases=`mysql -u $MYSQL_USER -p$MYSQL_PASS -e "SHOW DATABASES;" | tr -d "| " | grep -v Database`
+for db in $databases; do
+  if [[ "$db" != "information_schema" ]] && [[ "$db" != "performance_schema" ]] && [[ "$db" != "mysql" ]] && [[ "$db" != _* ]] ; then
+    echo "Dumping database: $db"
+    FILENAME=/backup/$DATE.$db.sql
+    if mysqldump -h $MYSQL_HOST -P $MYSQL_PORT -u $MYSQL_USER -p$MYSQL_PASS $db > $FILENAME ;then
+      gzip -f $FILENAME
+    else
+      rm -rf $FILENAME
+    fi
+  fi
+done
+
+if [ -n "$MAX_BACKUPS" ]; then
+  while [ `ls -1 /backup | wc -l` -gt "$MAX_BACKUPS" ];
+  do
+    TARGET=`ls -1 /backup | sort | head -n 1`
+    echo "Backup \${TARGET} is deleted"
+    rm -rf /backup/\${TARGET}
+  done
+fi
+
+echo "=> Backup done"

restore.sh

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+#!/bin/bash
+echo "=> Restore database from \$1"
+if mysql -h $MYSQL_HOST -P $MYSQL_POR -u $MYSQL_USER -p$MYSQL_PASS < \$1 ;then
+    echo "=> Restore succeeded"
+else
+    echo "=> Restore failed"
+fi

run.sh

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+#!/bin/bash
+touch /mysql_backup.log
+tail -F /mysql_backup.log &
+
+if [ -n "${INIT_BACKUP}" ]; then
+  echo "=> Create a backup on the startup"
+  /backup.sh
+elif [ -n "${INIT_RESTORE_LATEST}" ]; then
+  echo "=> Restore latest backup"
+  until nc -z $MYSQL_HOST $MYSQL_PORT
+  do
+      echo "waiting database container..."
+      sleep 1
+  done
+  ls -d -1 /backup/* | tail -1 | xargs /restore.sh
+fi
+
+echo "${CRON_TIME} /backup.sh >> /mysql_backup.log 2>&1" > /crontab.conf
+crontab /crontab.conf
+echo "=> Running cron task manager"
+exec crond -f