I have Ubuntu cloud servers running which I don't have direct access to but with ssh. I'm using 'tar' to clone or to have high availability of this server. I followed the tutorial from the link [link text][1]. I tried this installing a new server of same version. When I extracted the tar (tar -xvpzf ~/clone.tgz -C /) on the destination (new), at the end it's ending with the following output similar to the below (don't know if it's error).
tar: var/run: time stamp 2010-11-09 17:09:11 is 7335.159880406 s in the future
tar: var/spool/postfix/usr/lib/zoneinfo: time stamp 2010-11-09 17:08:26 is 7290.159730037 s in the future
tar: var/lib: time stamp 2010-11-09 17:27:51 is 8455.159349527 s in the future
tar: usr/bin: time stamp 2010-11-09 17:28:02 is 8466.159254097 s in the future
tar: usr/share/sgml: time stamp 2010-11-09 17:27:47 is 8451.158909506 s in the future
tar: usr/share/man/man7: time stamp 2010-11-09 17:27:50 is 8454.158393583 s in the future
tar: usr/share/man/man1: time stamp 2010-11-09 17:28:02 is 8466.158166556 s in the future
tar: usr/share/man/man8: time stamp 2010-11-09 17:27:51 is 8455.158057701 s in the future
tar: usr/share/omf/time-admin: time stamp 2010-11-09 17:27:52 is 8456.157830449 s in the future
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I'm using following command to create a tar file of the specified directories on the source system.
tar -cvzf ~/clone.tgz --exclude ~/clone.tgz --exclude /etc/hosts --exclude /etc/hostname --exclude /etc/udev/ --exclude /etc/network/interfaces --exclude /etc/resolv.conf /etc /home /opt /tmp /usr /var /mnt
- Is there any precautions before using tar? (the tar is one time creation from then I'll be using rsync)
- Should I've to include any more directory like bin or lib? - suggest me
- Should I've to exclude any directory? Like I had a network device (eth0) problem (failed to start up eth0). So in the above command I've excluded "/etc/udev/" and after this I felt this was fine. Like this, is there any thing I've to exclude from /etc/ or from any directory that I've included? - suggest me.
- How could I schedule rsync (incremental bkp) with ssh combination to sync the directories (specified in tar) to the remote location (say /mnt/newdir) which I could tar and extract it later in case of system failure. Rsync can be scheduled to run as root user but the ssh will prompt for the password. FYI, sudo is completely disabled and as well as direct ssh login to root is also disabled.
If there is any better way without any harm to server to achieve this, can suggest.
[1]: http://ubuntuforums.org/showthread.php? t=525660