Difference between revisions of "Sync one directory on one machine to another"
(→What if the network is dealyed) |
|||
Line 41: | Line 41: | ||
===What if the network is dealyed=== | ===What if the network is dealyed=== | ||
− | If your network is taking | + | If your network is taking its time to get up and being stable you can modify the control file that starts up the lsync daemon. |
<source lang=bash> | <source lang=bash> |
Revision as of 09:13, 8 July 2016
Now you may be in the situation that you want to keep two directories in sync. In my example it was a virtual Fedora that I wanted keep a copy of in another place. My virtual is running on my home laptop and the work I do here I want to copy to a network connected drive out on the university.
Luckely one good hearted soul invented lsyncd. See github for more details and the manual.
What I did was to install lsyncd, which is a part of one of the Fedora repositories I have installed, in fact the default Fedora repository.
So, as root, issue:
dnf install lsyncd
then enable the lsyncd daemon
systemctl enable lsyncd.service
next edit the configuration file
vi /etc/lsyncd.conf
to have a similar content as shown below. Modify for your need.
sync{ default.rsyncssh, source="/home/klaus/workspaces", host="klaus@192.168.0.183", targetdir="/home/klaus/mounts/.../workspaces" }
From this you can see that I want to copy whatever exists in /home/klaus/workspaces to my laptop, identified by the login name and the IP address. The destination is my sshFS mounted remote filesystem on the university network.
Just before starting the lsyncd do ensure that your root account can login on the remote computer by issuing
ssh-copy-id -i ~/.ssh/id_rsa.pub klaus@192.168.0.183
test that you can login without using password.
Finally let the daemon loose
systemctl start lsyncd.service
In a few seconds you'll wee that the local directory structur and files are rsync'ed to the remote destination. Take a look on the man page for rsync - it's a pretty neat tool for synchronising computers and other stuff. lsync just builds an easy interface for using rsync.
What if the network is dealyed
If your network is taking its time to get up and being stable you can modify the control file that starts up the lsync daemon.
vi /etc/systemd/system/multi-user.target.wants/lsyncd.service
Add a line
Requires=network-online.target
in the Unit section.
This will ensure that the network is up and that rsync is able to establish a connection to the remote server. If rsync fails login in the lsyncd fails too.