1. Berkley Database Information Index (BDII) Server Installation & Configuration
Giuseppe La Rocca
INFN – Catania
gLite Tutorial
Rome, April 2006

2. Giuseppe La Rocca, INFN Catania  gLite Tutorial  Roma, 18-21.04.2006
Outline
Information System Overview
How to install a BDII Server
BDII customization
References
Giuseppe La Rocca, INFN Catania  gLite Tutorial  Roma,

3. Giuseppe La Rocca, INFN Catania  gLite Tutorial  Roma, 18-21.04.2006
Information System: overview
The Information System (IS) provides information about grid resources and their actual status.
Computing and Storage resources at a site report their static and dynamic status information via GRISes (Grid Resource Information Server)
one per grid element
At each site an element called GIIS (Grid Index Information Server) collects information from all the site GRISes
one per grid site
The BDII (Berkley Database Information Index) queries the GIISes (of different sites) and acts as a cache storing information about the Grid status in its database.
Giuseppe La Rocca, INFN Catania  gLite Tutorial  Roma,

4. IS Components: GRISs, GIISs and BDII
Each site
can run
a BDII. It
collects the information
coming from the GIISs
At each site, a site GIIS collects the
information
given by the GRISs
Local GRISes run on CEs and SEs at each site and report
dynamic and static information
From LCG2.3.0 site GIIS has been replaced by
“local” BDII
Giuseppe La Rocca, INFN Catania  gLite Tutorial  Roma,

5. Giuseppe La Rocca, INFN Catania  gLite Tutorial  Roma, 18-21.04.2006
The Information System in LCG
The IS in LCG
BDII-A
BDII-B
BDII-C CE
Local GRIS
CE Site GIIS CE
Local GRIS
CE Site GIIS CE
Local GRIS
CE Site GIIS SE
Local GRIS SE
Local GRIS CE
Local GRIS SE
Local GRIS CE
Local GRIS SE
Local GRIS RB
Local GRIS
Site 1
Site 2
Site 3
Giuseppe La Rocca, INFN Catania  gLite Tutorial  Roma,

6. Giuseppe La Rocca, INFN Catania  gLite Tutorial  Roma, 18-21.04.2006
BDII
Users and other Grid services (such as the RB) can interrogate BDIIs to get information about the Grid status.
Each BDII collects information from the site GIISes (or local BDII) defined in a configuration file, which it accesses through a web interfaces.
Every two minutes a cron-job runs a script and collects information (pull model) from all the GIIS (local BDII) listed in the configuration file
Giuseppe La Rocca, INFN Catania  gLite Tutorial  Roma,

7. BDII Server Installation
Giuseppe La Rocca, INFN Catania  gLite Tutorial  Roma,

8. Installation Pre-requisites
Start from a fresh install of SLC 3.0.x
Verify that apt is installed and properly configured:
rpm -qa | grep apt
Install apt if necessary:
rpm -ivh
Java SDK is required to install almost any LCG/gLite grid services. Due to license issues, it is not found in the LCG repositories. So please download and install a release of Sun Java SDK >= 1.4.2_08 from
chmod +x j2sdk-1_4_2_10-linux-i586-rpm.bin
./j2sdk-1_4_2_10-linux-i586-rpm.bin
rpm -ivh j2sdk-1_4_2_10-linux-i586.rpm
Preparing ########################################### [100%]
1:j2sdk ########################################### [100%]
Giuseppe La Rocca, INFN Catania  gLite Tutorial  Roma,

9. Node Syncronization with NTP
Syncronization among all LCG nodes is mandatory. It can be achieved by the NTP protocol and a time server
Install ntp if not already available for your system:
apt-get install ntp
Add your time server in /etc/ntp.conf
restrict <time_server_IP_address> mask nomodify notrap noquery
server <time_server_name>
(you can use ntp-1.infn.it – IP )
Edit /etc/ntp/step-tickers adding your(s) time server(s) hostname
If you are running a firewall, you will have to allow inbound comminication on the NTP port:
-A RH-Firewall-1-INPUT -m state --state NEW -p udp --dport 123 -j ACCEPT
Activate the ntpd service with the following commands:
ntpdate <your ntp server name>
service ntpd start
chkconfig ntpd on
Giuseppe La Rocca, INFN Catania  gLite Tutorial  Roma,

10. Giuseppe La Rocca, INFN Catania  gLite Tutorial  Roma, 18-21.04.2006
YAIM Installation
YAIM is a set of bash scripts used to install and easily configure the LCG middleware on the target machine
Ensure you FQDN is properly set
hostname –f
Find the latest YAIM version at
Download it using wget
wget
Install using
rpm -ivh lcg-yaim noarch.rpm
Giuseppe La Rocca, INFN Catania  gLite Tutorial  Roma,

11. Site Configuration File
All the configuration values to sites have to be configured in a site configuration file using key-value pairs.
This file is shared among all the different LCG node types. So edit once and keep it in a safe place.
Create a copy of /opt/lcg/yaim/examples/site-info.def template (coming from the lcg-yaim RPM) to your reference directory for the installation (e.g. /root):
cp /opt/lcg/yaim/examples/site-info.def /root/my-site-info.def
The general syntax of the file is a sequence of bash-like assignments of variables (<variable>=<value>, no spaces are allowed around =).
A good syntax test for your site configuration file is to try to source it manually running the command:
source my-site-info.def
Giuseppe La Rocca, INFN Catania  gLite Tutorial  Roma,

12. Giuseppe La Rocca, INFN Catania  gLite Tutorial  Roma, 18-21.04.2006
BDII Server related variables
MY_DOMAIN=fis.uniroma3.it
BDII_HOST=gilda03
BDII_HTTP_URL=“
list of the GIIS (or local BDII) from which the BDII server fetches the information
In this example, we are using the GIISes of all the GILDA sites
LCG_REPOSITORY and CA_REPOSITORY
you have to set this variables only if you are using a software repository different from the default.
LCG_REPOSITORY=“'rpm LCG/apt/LCG-2_7_0/sl3/en/i386 lcg_sl3 lcg_sl3.updates lcg_sl3.security' 'rpm apt/LCG-2_7_0/sl3/en/i386 lcg_sl3 lcg_sl3.updates lcg_sl3.security‘”
CA_REPOSITORY="rpm apt/LCG_CA/en/i386 lcg"
Giuseppe La Rocca, INFN Catania  gLite Tutorial  Roma,

13. Installation and configuration scripts
Start the download and installation of all the needed package using the following command:
/opt/lcg/yaim/scripts/install_node /root/my-site-info.def lcg-BDII
Start the configuration of the BDII according the information provided into the my-site-info.def with:
/opt/lcg/yaim/scripts/configure_node /root/my-site-info.def BDII
If you are running a firewall, you will have to allow inbound comminication on the BDII port :
-A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport j ACCEPT
Installation and configuration scripts
Giuseppe La Rocca, INFN Catania  gLite Tutorial  Roma,

14. Test your fresh new BDII Server
Issue an ldapsearch to check if BDII is correctly publishing sites informations:
ldapsearch -x -h gilda03.fis.uniroma3.it -p b 'mds-vo-name=local,o=grid‘ Or
Use LDAP Browser to test your BDII. You can download it from:
Log into a LCG User Interface machine and use lcg-infosites:
export LCG_GFAL_INFOSYS=gilda03.fis.uniroma3.it:2170
lcg-infosites --vo gilda se
Giuseppe La Rocca, INFN Catania  gLite Tutorial  Roma,

15. Giuseppe La Rocca, INFN Catania  gLite Tutorial  Roma, 18-21.04.2006
BDII customization
BDII configuration file can be found in /opt/bdii/etc/bdii.conf
BDII_PORT_READ=2170
BDII_PORTS_WRITE=" "
BDII_USER=edguser
BDII_BIND=mds-vo-name=local,o=grid
BDII_PASSWD=23385
BDII_SEARCH_FILTER='(|(objectClass=GlueSchemaVersion)(objectClass=GlueTop))'
BDII_SEARCH_TIMEOUT=30
BDII_BREATHE_TIME=60 -- every 2 minutes BDII cache is refreshed
BDII_AUTO_UPDATE=yes -- set to no if you want to create a static list of GIIS
BDII_AUTO_MODIFY=yes
BDII_DIR=/opt/bdii/
BDII_UPDATE_URL=
BDII_UPDATE_LDIF=
SLAPD=/usr/sbin/slapd
SLAPADD=/usr/sbin/slapadd
Giuseppe La Rocca, INFN Catania  gLite Tutorial  Roma,

16. BDII customization (II)
Change BDII_UPDATE_URL to:
Restart the service with: /etc/init.d/bdii restart
Give a look to the new information published by the service
/opt/bdii/etc/bdii-update.conf contains the list of GIIS:
...
INFN-CATANIA ldap://grid010.ct.infn.it:2170/mds-vo-name=infn-catania,o=grid # 2.6.0
INFN-CNAF ldap://grid011f.cnaf.infn.it:2170/mds-vo-name=infn-cnaf,o=grid # 2.6.0
INFN-PADOVA ldap://gilda-ce-01.pd.infn.it:2170/mds-vo-name=infn-padova,o=grid # 2.6.0
IISAS-BRATISLAVA ldap://dgt01.ui.savba.sk:2170/mds-vo-name=iisas-gilda,o=grid # 2.6.0
ULA-MERIDA ldap://grid006.cecalc.ula.ve:2170/mds-vo-name=ula-merida,o=grid …
Giuseppe La Rocca, INFN Catania  gLite Tutorial  Roma,

17. BDII Log Files and References
/opt/bdii/var/bdii.log
BDII Documentation:
Information System Trouble Shooting Guide
Giuseppe La Rocca, INFN Catania  gLite Tutorial  Roma,

18. Giuseppe La Rocca, INFN Catania  gLite Tutorial  Roma, 18-21.04.2006