Update b_n_r_backup.md
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@ -72,3 +72,26 @@ if [ $RESULT -ne 0 ]
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cat "$OUT"
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fi
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```
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# Backup strategy with rsync and mailcow backup script
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Create the destination directory for mailcows helper script:
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```
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mkdir -p /external_share/backups/backup_script
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```
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Create cronjobs:
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```
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25 1 * * * rsync -aH --delete /opt/mailcow-dockerized /external_share/backups/mailcow-dockerized
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40 2 * * * rsync -aH --delete /var/lib/docker/volumes /external_share/backups/var_lib_docker_volumes
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5 4 * * * cd /opt/mailcow-dockerized/; BACKUP_LOCATION=/external_share/backups/backup_script /opt/mailcow-dockerized/helper-scripts/backup_and_restore.sh backup mysql crypt redis --delete-days 3
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# If you want to, use the acl util to backup permissions of some/all folders/files: getfacl -Rn /path
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```
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On the destination (in this case `/external_share/backups`) you may want to have snapshot capabilities (ZFS, Btrfs etc.). Snapshot daily and keep for n days for a consistent backup.
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Do **not** rsync to a Samba share, you need to keep the correct permissions!
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To restore you'd simply need to run rsync the other way round and restart Docker to re-read the volumes. Run `docker-compose pull` and `docker-compose up -d`.
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If you are lucky Redis and MariaDB can automatically fix the inconsistent databases (if they _are_ inconsistent).
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In case of a corrupted database you'd need to use the helper script to restore the inconsistent elements. If a restore fails, try to extract the backups and copy the files back manually. Keep the file permissions!
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