[one-users] RANK expression

[Carlos Martín Sánchez]

Hi,

On Mon, Oct 24, 2011 at 8:40 PM, Faarooq Lowe <lowe at fnal.gov> wrote:

> Are there any pre-defined values for disk space that may be used for the
> RANK expression in a template?
>
>
We don't have any probe to report the free disk space, but adding new probes
is really easy.
You just need to add a new file to /var/lib/one/remotes/im/<virtualizer>.d,
take a look for instance at /var/lib/one/remotes/im/kvm.d/name.sh

#!/bin/sh
echo HOSTNAME=`uname -n`

Remember to execute 'onehost sync' as oneadmin to refresh the probes on the
hosts.


> Also is there away to evaluate expressions in a specific order such as;
> FREEMEMORY, DISKSPACE, - RUNNING_VMS etc.?
>
>
The RANK expression accepts arithmetic operators [2], so you can assign
weights to each attribute. You might want to normalize the values first.

Best regards.

[1] http://opennebula.org/documentation:rel3.0:img#tunning_extending
[2]
http://opennebula.org/documentation:rel3.0:template#rank_expression_syntax
--
Carlos Martín, MSc
Project Engineer
OpenNebula - The Open Source Toolkit for Cloud Computing
www.OpenNebula.org <http://www.opennebula.org/> | cmartin at opennebula.org


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