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Full Discussion: Using rsync --link-dest pointing to a remote server
Top Forums Shell Programming and Scripting Using rsync --link-dest pointing to a remote server Post 302824807 by Orionizer on Friday 21st of June 2013 02:52:16 PM
Old 06-21-2013
Using rsync --link-dest pointing to a remote server
Ok, I'm trying to figure out how to reference a remote file using the rsync --link-dest parameter.

Here is the code I have so far:

Code:
#
# FILESERVER INCREMENTAL BACKUP SCRIPT
#

# Remove previous log file

rm /usr/local/bin/rsync-incremental.log

# Set daily variables

DAY0=`date -I`
DAY1=`date -I -d "1 day ago"`
DAY6=`date -I -d "2 days ago"`
DAY7=`date -I -d "3 days ago"`
DAY8=`date -I -d "4 days ago"`

# Set rsync variables

SRC="/usr/smbshares"
TRG="root@synology1:/volume1/Fileserver/$DAY0"
LNK="root@synology1:/volume1/Fileserver/$DAY1"
OPT="-avhz -e ssh --log-file=/usr/local/bin/rsync-incremental.log --delete --link-dest=$LNK"

# Remove old backups

ssh root@synology1 "if [[ -d /volume1/Fileserver/$DAY6 ]]; then nohup rm -rf "/volume1/Fileserver/$DAY6"; fi"

ssh root@synology1 "if [[ -d /volume1/Fileserver/$DAY7 ]]; then nohup rm -rf "/volume1/Fileserver/$DAY7"; fi"

ssh root@synology1 "if [[ -d /volume1/Fileserver/$DAY8 ]]; then nohup rm -rf "/volume1/Fileserver/$DAY8"; fi"

# Perform the rsync

rsync $OPT $SRC $TRG

Everything is working now except the --link-dest parameter. I get the following error at the beginning of execution:

--link-dest arg does not exist: root@synology1:/volume1/Fileserver/2013-06-20

What's funny is the rsync has no issue using the same syntax for the target folder of the command...

Anyone know how to reference the remote file for this?

Thanks!

---------- Post updated at 01:52 PM ---------- Previous update was at 01:31 PM ----------

If anyone is wondering, I'm trying to accomplish backing up a SLES Samba server to a remote Synology NAS. I want to keep 5 days worth of backups on the NAS, but only the original or changed files. Not backing up ALL files all five days.

If a backup folder exists that is 6, 7 or 8 days old, I want to remove it to keep files from accumulating on the NAS over time.

I know the $DAY6, etc. variables are wrong as I changed them for testing purposes.

So that's what I'm trying to accomplish. If you can think of any better way to accomplish this, I'd be glad to give that a shot as well, but from what I've read it seems rsync is pretty reliable and quick.

As it's working right now, I am getting the 5 days worth of backups, but it's copying every file every time as the --link-dest isn't working.
 

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LEARN ABOUT SUSE

ocf_heartbeat_rsyncd

OCF_HEARTBEAT_RSYNCD(7) 					OCF resource agents					   OCF_HEARTBEAT_RSYNCD(7)

NAME

       ocf_heartbeat_rsyncd - Manages an rsync daemon

SYNOPSIS

       rsyncd [start | stop | monitor | validate-all | meta-data]

DESCRIPTION

       This script manages rsync daemon

SUPPORTED PARAMETERS

       binpath
	   The rsync binary path. For example, "/usr/bin/rsync" (optional, string, default rsync)

       conffile
	   The rsync daemon configuration file name with full path. For example, "/etc/rsyncd.conf" (optional, string, default /etc/rsyncd.conf)

       bwlimit
	   This option allows you to specify a maximum transfer rate in kilobytes per second. This option is most effective when using rsync with
	   large files (several megabytes and up). Due to the nature of rsync transfers, blocks of data are sent, then if rsync determines the
	   transfer was too fast, it will wait before sending the next data block. The result is an average transfer rate equaling the specified
	   limit. A value of zero specifies no limit. (optional, string, no default)

SUPPORTED ACTIONS

       This resource agent supports the following actions (operations):

       start
	   Starts the resource. Suggested minimum timeout: 20s.

       stop
	   Stops the resource. Suggested minimum timeout: 20s.

       monitor
	   Performs a detailed status check. Suggested minimum timeout: 20s. Suggested interval: 60s.

       validate-all
	   Performs a validation of the resource configuration. Suggested minimum timeout: 20s.

       meta-data
	   Retrieves resource agent metadata (internal use only). Suggested minimum timeout: 5s.

EXAMPLE

       The following is an example configuration for a rsyncd resource using the crm(8) shell:

	   primitive example_rsyncd ocf:heartbeat:rsyncd 

	     op monitor depth="0" timeout="20s" interval="60s"

SEE ALSO

       http://www.linux-ha.org/wiki/rsyncd_(resource_agent)

AUTHOR

       Linux-HA contributors (see the resource agent source for information about individual authors)

resource-agents 1.0.3						    07/05/2010						   OCF_HEARTBEAT_RSYNCD(7)
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