Rsync : Sync Files/Directories2018/11/29

Configure Rsync to sync files or directories to localhost or remotehost.
Basic usage of rsync command is here.

For Local <=> Remote sync, when using rsync command, SSH protocol is used by default, so it needs SSH Server is running on the remotehost.

On this example, Configure Rsync as a service.
To run Rsync daemon, it's easy to configute synchronization settings and also Rsync uses 873/TCP port, not uses SSH, so it doesn't need SSH Service on remotehost.

For example, Configure Rsync to copy files and directories under the [/root/work] on dlp.srv.world to [/home/backup] on node01.srv.world.


+----------------------+          |          +----------------------+
|     dlp.srv.world    |10.0.0.30 | 10.0.0.51|   node01.srv.world   |
|                      +----------+----------+                      |
|     /root/work/*     |   ------------->    |     /home/backup/*   |
+----------------------+        copy         +----------------------+

[1]	Configure on source host.

root@dlp:~#

apt -y install rsync

root@dlp:~#

vi /etc/rsync_exclude.lst

# specify files or directories you'd like to exclude to copy

test
test.txt

[2]	Configure on destination host.

root@node01:~#

apt -y install rsync

root@node01:~#

vi /etc/rsyncd.conf

# create new

# any name you like
[backup]
# destination directory to copy
path = /home/backup
# hosts you allow to access
hosts allow = 10.0.0.30
hosts deny = *
list = true
uid = root
gid = root
read only = false

root@node01:~#

mkdir /home/backup

root@node01:~#

systemctl start rsync

[3]	It's OK. Execute rsync on Source Host like follows.

root@dlp:~#

rsync -avz --delete --exclude-from=/etc/rsync_exclude.lst /root/work/ node01.srv.world::backup

# Add in cron if you'd like to run reguraly

root@dlp:~#

crontab -e

# for example, run at 2:00 AM in a day

00 02 * * * rsync -avz --delete --exclude-from=/etc/rsync_exclude.lst /root/work/ node01.srv.world::backup

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