Backup postgres inside docker container

backup.sh

#!/bin/bash

#### Definitions
db_username=user
container_filter=cimentao_db
backup_dir=/home/ubuntu/backup

### Variables
date=`date +%Y-%m-%d"_"%H_%M_%S`
filename=dump_$date.gz

### Process
echo -n -e "\e[39mStarting Backup >> "
cd $backup_dir

echo -e '=> \e[33mDeleting backups but mantainning last 7 days'
ls -tr dump* | head -n -14 | xargs --no-run-if-empty rm

CONTAINER_NAME=`docker ps --filter "name=$container_filter" --format "{{.Names}}"`

docker exec -t  $CONTAINER_NAME pg_dumpall -c -U $user | gzip -9 > $filename

if test -f "$filename"; then
    echo -n -e  "\e[32m$filename: \e[39m `ls -lh $filename | awk -v col=5 '{print $col}'` >> Gzip file is: "
    if  gzip -t $filename; then 
        echo  -e '\e[32mOK' 
        exit 0
    else 
        echo -e '\e[31mFAIL!!!' 
        gzip -t -v $filename
        exit 1
    fi
else
    echo -e "file $filename \e[31mNOT FOUND"
    exit 0
fi

echo -e '=> \e[33mDeleting backups but mantainning last 7 days'
ls -tr dump* | head -n -14 | xargs --no-run-if-empty rm 

echo -e '=>\e[32mBackup Done'

gistfile1.txt

## CRONTAB -E

0 15,22  * * * cd /home/ubuntu/backup/ && sh backup.sh >> backup.log