mailcow-dockerized-docs/docs/b_n_r_backup.md

Backup

Manual

You can use the provided script helper-scripts/backup_and_restore.sh to backup mailcow automatically.

Please do not copy this script to another location.

To run a backup, write "backup" as first parameter and either one or more components to backup as following parameters. You can also use "all" as second parameter to backup all components. Append --delete-days n to delete backups older than n days.

# Syntax:
# ./helper-scripts/backup_and_restore.sh backup (vmail|crypt|redis|rspamd|postfix|mysql|all|--delete-days)

# Backup all, delete backups older than 3 days
./helper-scripts/backup_and_restore.sh backup all --delete-days 3

# Backup vmail, crypt and mysql data, delete backups older than 30 days
./helper-scripts/backup_and_restore.sh backup vmail crypt mysql --delete-days 30

# Backup vmail
./helper-scripts/backup_and_restore.sh backup vmail

The script will ask you for a backup location. Inside of this location it will create folders in the format "mailcow_DATE". You should not rename those folders to not break the restore process.

To run a backup unattended, define MAILCOW_BACKUP_LOCATION as environment variable before starting the script:

MAILCOW_BACKUP_LOCATION=/opt/backup /opt/mailcow-dockerized/helper-scripts/backup_and_restore.sh backup all

Cronjob

You can run the backup script regularly via cronjob. Make sure BACKUP_LOCATION exists:

5 4 * * * cd /opt/mailcow-dockerized/; MAILCOW_BACKUP_LOCATION=/mnt/mailcow_backups /opt/mailcow-dockerized/helper-scripts/backup_and_restore.sh backup mysql crypt redis --delete-days 3

Per default cron sends the full result of each backup operation by email. If you want cron to only mail on error (non-zero exit code) you may want to use the following snippet. Pathes need to be modified according to your setup (this script is a user contribution).

This following script may be placed in /etc/cron.daily/mailcow-backup - do not forget to mark it as executable via chmod +x:

#!/bin/sh

# Backup mailcow data
# https://mailcow.github.io/mailcow-dockerized-docs/b_n_r_backup/

set -e

OUT="$(mktemp)"
export MAILCOW_BACKUP_LOCATION="/opt/backup"
SCRIPT="/opt/mailcow-dockerized/helper-scripts/backup_and_restore.sh"
PARAMETERS="backup all"
OPTIONS="--delete-days 30"

# run command
set +e
"${SCRIPT}" ${PARAMETERS} ${OPTIONS} 2>&1 > "$OUT"
RESULT=$?

if [ $RESULT -ne 0 ]
    then
            echo "${SCRIPT} ${PARAMETERS} ${OPTIONS} encounters an error:"
            echo "RESULT=$RESULT"
            echo "STDOUT / STDERR:"
            cat "$OUT"
fi