vzdump wait between VM

[ddarko]

Hi,
My command to perform backups as follows:
vzdump --quiet 1 --bwlimit 20480 --mode snapshot --all 1 --ionice 7 --compress lzo --storage local

Despite ionice and bwlimit during backup server for a few minutes is not responsive.
I thought it would be good to wait a while between each VM.
How to do it?
Naturally, to keep the "--all" option.

eg.
vzdump --quiet 1 --bwlimit 20480 --mode snapshot --all 1 --ionice 7 --compress lzo --storage local --waitbetween 60

Which causes a break of 60 seconds between the backup each VM.

 

[Thomas Lamprecht]

VZDump has a hook up script option. You can pass it a script and VZDump runs that on event like backup start, stop, abort and so on.
I made a sample script which should fit your need:

#!/bin/bash
if [ "$1" == "backup-end" ]; then
    sleep 60;  # here goes your time in seconds
fi

save that in a file, for example vzdump_wait_hook.sh then a vzdump command like this would run it:

vzdump --all --compress lzo --storage my_nfs --mode snapshot --remove 0 --node pvenode1 --script ./hook-test.sh

If you have basic knowledge of scripting your possibility are almost infinity... Note, the script hasn't to be bash, everything your server can run is allowed, also compiled c program or whatever.

------
EDIT: if you want to control the sleep time in your vzdump command, use this:

#!/bin/bash
if [ "$2" == "backup-end" ]; then
    sleep $1; # seconds defined by parameter
fi

Now you can give the hook script your desired waiting time as a parameter:

vzdump --all --compress lzo --storage nfs_wl --mode snapshot --remove 0 --node devpve --script "./hook-test.sh 20"

here it would sleep 20 seconds between backups...