How to Publish Space Tokens with DPM

A GIP provider is available to publish all space tokens defined in a DPM installation into BDII. Only space tokens corresponding to static reservations are published (a static reservation is a reservation made by DPM administrator).

The GIP provider consists of 2 parts :

• A script that must be installed in libexec in your LCG installation path (generally /opt/lcg). The script is attached to this page.
• A wrapper installed in var/gip/provider in your LCG installation path. The wrapper launches the script with one argument corrresponding to the file with configuration information for the DPM database (normally /opt/lcg/etc/DPMINFO, the same as for DPM GIP plugin). Wrapper name is not relevant : all the wrappers present in =provider directory are executed. Recommended name is lcg-info-space-tokens.

A typical wrapper content is :

#!/bin/sh
/opt/lcg/libexec/lcg-info-dpm-space-tokens /opt/lcg/etc/DPMINFO

If you use Quattor with QWG Templates, there is nothing to do : the GIP provider is installed and configured as part of DPM configuration (requires QWG Templates 3.0.2-13 or later or 3.1.0-2 or later).

Additional Notes

YAIM Sites

• If your DPMINFO configuration contains the DPNS database name this will break the plugin. Remove it to only have USER/PASSWD@HOST.
• You must ensure that the dpminfo user has access to the dpm_db database. This is not done by YAIM by default.

mysql> grant select on dpm_db.* to dpminfo;
mysql> flush privileges;

SL3 gLite3.0 Hosts

• For gLite 3.0 nodes edit the $mds_vo_name variable in the script to be "local" instead of "resource".
• It is likely that SL3 gLite 3.0 hosts will also have to add the following line to /opt/bdii/etc/bdii-update.conf

Provider file:///opt/lcg/var/gip/provider/lcg-info-space-tokens 

Other Issues

• It has been noted on some dual hosted nodes that the Net::Domain returns the wrong hostname. In this case have instead:

my $this_host = `hostname -f`;
chomp($this_host);
my $this_domain = $dpm_domain;

-- MichelJouvin - 24 Sep 2007