create a backup from mysql with innobackupex with docker

backup-my.cnf

#vi /etc/backup-my.cnf
[client]
user=backup
password=password
[mysqld]
#socket=/var/run/mysqld/mysqld.sock
host=127.0.0.1
datadir=/var/lib/mysql
innodb_log_group_home_dir=/var/lib/mysql
#GRANT CREATE TABLESPACE, RELOAD, PROCESS, SUPER, LOCK TABLES, REPLICATION CLIENT ON . TO 'backup'@'localhost';

Dockerfile

FROM ubuntu:16.04
MAINTAINER Novid Agha Hasani <novid.aghahasani@gmail.com>

RUN apt-key adv --keyserver keys.gnupg.net --recv-keys 1C4CBDCDCD2EFD2A
RUN echo "deb http://repo.percona.com/apt xenial main" >> /etc/apt/sources.list && \
    apt-get update
RUN apt-get install -y --allow-unauthenticated percona-xtrabackup-24 tzdata

ENV TZ=Asia/Tehran
RUN ln -snf /usr/share/zoneinfo/$TZ /etc/localtime && echo $TZ > /etc/timezone

VOLUME /var/backup/mysql


CMD cdate=$(date +%Y-%m-%d-%H-%M) && mkdir -p "/target/$cdate" && cd "/target/$cdate" && innobackupex --defaults-file=/etc/backup-my.cnf \
  --no-lock \
  --no-timestamp \
  --host=127.0.0.1 \
  --password=password \
  --user=backup \
  --port=3306 \
  --use-memory=1G \
  --parallel=4 \
  . \
 >  ../backup-progress.log 2>&1 && innobackupex --apply-log . > ../backup-progress.log 2>&1 && cd .. && tar -czf "$cdate.tgz" /target/$cdate 2> /dev/null && rm -rf /target/$cdate


#crontab -e 
# 48 * * * * docker run --volumes-from mysql -v /etc/backup-my.cnf:/etc/backup-my.cnf -v /backup:/target --net=container:mysql --rm xtrabackup 2>&1