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What are my options to mirror a running system (without taking it down) to have an as close as possible copy for use as a XEN guest?

Now I'm planning to install the same version of OS as domU and simply rsync everything down to it from the live system. Not sure about /boot | kernel stuff though, any problems syncing these?

Also, can I set a remote "nice" level for rsync, cap bandwidth - to avoid putting stress on the live server?

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2 Answers 2

up vote 2 down vote accepted

"DRBD® refers to block devices designed as a building block to form high availability (HA) clusters. This is done by mirroring a whole block device via an assigned network. DRBD can be understood as network based raid-1."

I use drbd in my XEN Cluster.

HINT2: LVM2 is perfect addition

P.S. Please excuse my bad english...

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Hi, thanks for your suggestions, though they're not related to the question - I need a use-one-time way of mirroring a running server to a remote machine in order to make a domU out of it. –  Karolis T. Jun 22 '09 at 13:01
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old server# rsync --verbose --progress --stats --recursive --times --perms --links --owner --group --hard-links --devices --exclude "/proc" --exclude "/sys" --exclude "/backups" /* IP.IP.IP.IP:/mount/point This work for me P.S. I use HVM and not custom kernel –  Yordan Jun 22 '09 at 13:28
    
Thanks, guess I'll have to use rsync. –  Karolis T. Jun 22 '09 at 19:12

rsync has a --bwlimit option to limit bandwidth.

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