rsync_backup

Rsync_backup does incremental backups (with hard links) and keeps the last backups over a defined time period (rotation). i.e. the total size of five backups for the folder "toto" is not 5x "toto" but 1x "toto" + the modified files from within "toto".

The destination folder can be either local or on a remote SSH server.

Usage

$ rsync_backup.sh task

where 'task' is a file gathering all the settings for your backup. 'dummy_task' is a commented dummy file for a backup task.

Example

For a task called "backup_toto" and defined as:

$ cat backup_toto

SIMULATION=0
HOLD="30"
SRC_PTH="/path/to/folder/"
SRC_FLD="toto"
EXCLUDE="--exclude=*_NOBACKUP/"
DST_PTH="/my/backup/folder/"
LOG="/my/log/folder/${SRC_FLD}_backup.log"

then,

$ rsync_backup.sh backup_toto

will backup the content of /path/to/folder/toto into /my/backup/folder/toto_yyyy-mm-dd where yyyy-mm-dd is the current date. A log file is also created /my/log/folder/toto_backup.log

If you run this as a weekly job in crontab, your backup folder will be populated this way:

/my/backup/folder/toto_2015-02-26
/my/backup/folder/toto_2015-02-19
/my/backup/folder/toto_2015-02-12
/my/backup/folder/toto_2015-02-05
/my/backup/folder/toto_2015-01-30

The redundant content of each folder is hard-linked. Backup folders older than the defined 30 days are deleted.

Remote SSH server

if the backup folder is located on a remote SSH server, you can add the server settings in the 'task' file, such as:

LOGIN="my_login"
SERVER_IP="www.mybackupserver.net"
PORT="22"
RSA_KEY="/RSA/key/location"