GuillaumeHemmen/docker-mysql-cron-backup
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split docker images into different repos

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Fco. Javier Delgado del Hoyo 2017-03-27 21:16:15 +02:00
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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"]

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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

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#!/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"

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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

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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