1. The EU DataGrid Fabric Management Services
The European DataGrid Project Team

2. Outline Types of grid elements Architecture of the GRID
LCFGng server installation
DHCP,NFS and HTTP configuration
RPM configuration
XML configuration file
Testbed site configuration in Catania

3. Possible configurations of the site
Only CE + WN, SE : configure site for CPU and storage resources (minimal testbed) ;
Only UI : configure site for user accesses ;
All nodes (CE + WN, SE, UI) : configure site for all
resources (CPU, disk space, users access) .

4. LCFGng server installation
The procedure for setting up an LCFGng
server for the first time,using some shell
script and package lists to reduce amount of
manual work involved .
With this server it is possible to install nodes
with RedHat 6.2 or RedHat 7.3 .
The installation will start via diskette .

5. DHCP and NFS configuration
The documentation for LCFGng installation is available at the URL :
DHCP and NFS configuration

6. DHCP (for network boot information)
Insert into /etc/dhcpd.conf the follow informations
1- Hardware and ethernet address
2- The root-path and user-class
Example
host grid003 {
option user-class “
hardware ethernet 00:20:ed:13:3b:f6;
fixed-address ;
option root-path “/opt/local/linux/nginstallroot/6.2/”;
option option-151 “ }
Run the dhcp daemon
/etc/rc.d/inint.d/dhcpd start

7. NFS Add these lines to /etc/exports :
These allows access for RPMs repository
/opt/local/linux/ address-node(ro,no_root_squash)
/opt/local/linux/ address-node(ro,no_root_squash)
Theese allows access for installroot image
/opt/local/linux/nginstallroot/ address-node(ro,no_root_squash)
/opt/local/linux/nginstallroot/ address-node(ro,no_root_squash)

8. LCFG: RPM configuration
The list of RPMs to be installed on a node is defined in text files stored in the LCFG server
These RPM lists can be shared by several nodes; the LCFG configuration associates one list to each node
These files must be accessible to the clients using a remote file system (NFS)
The RPMs themselves must be also accessible via NFS
Any RPM installed manually in the client without being included in the files will be AUTOMATICALLY REMOVED

9. LCFG: XML configuration profiles
A daemon in the LCFG server (mkxprof) polls for changes in the source files and coverts them into XML profiles; one XML profile per client node
The XML profiles are published into a web server
LCFG clients can be configured to poll at regular intervals, or to receive automatic change notifications or they can fetch new profiles in response to an explicit command.
A daemon in each LCFG client (rdxprof) reads its associated XML profile from the web server and caches it locally (DBM file)
LCFG scripts access the local cache to extract the configuration values and execute changes accordingly
Mkxprof also generates a HTML status page:

10. LOCAL SERVICES (TESTBED SITE)
CONSOLE UI
HARD DISK SE
CPU CE WN
LOCAL SERVICES (TESTBED SITE)
LCFGng
Server
HTTP
XML
PROFILES
LCFG
CLIENT
S.O. RC RB
I I VO
GLOBAL SERVICES
GRID
console

11. Status page example (1)

12. Status page example (2)

13. Status page example (3)
If this link is clicked

14. Services status page (1)

15. Service status page (2)

16. Service status page (3)

17. Testbed site at Catania
LCFG
CLIENT
1 SE
Storage Element
LCFG
CLIENT
1 CE
mkxprof daemon
HTTP
XML
PROFILES
Computing Element
LCFG
CLIENT
6 WN
Worker Node
LCFGng
Server
1 RB
LCFG
CLIENT
3 UI
Resource Broker
User Interface