1. 12th EELA TUTORIAL - USERS AND SYSTEM ADMINISTRATOR www.eu-eela.org E-infrastructure shared between Europe and Latin America CE + WN installation and configuration Vanessa Hamar Universidad de Los Andes – Mérida, Venezuela 12 th EELA Tutorial Lima, 24-29 September,2007

2. 12th EELA TUTORIAL - USERS AND SYSTEM ADMINISTRATORS – Lima, 24-29 September, 2007 E-infrastructure shared between Europe and Latin America Outline What is a Computing Element (CE) ? What is a Torque Server ? What is a Worker Node? How to install and configure a Computing Element with Torque Server. How to install and configure a Worker Node with Torque

3. 12th EELA TUTORIAL - USERS AND SYSTEM ADMINISTRATORS – Lima, 24-29 September, 2007 E-infrastructure shared between Europe and Latin America What is CE? The CE is a service representing a computing resource. Its main functionality is job management (job submission, job control, etc.). For job submission, the CE can work in: –push model –push model (where the job is pushed to a CE for its execution). –pull model –pull model (where the CE asks the WMS for jobs).

4. 12th EELA TUTORIAL - USERS AND SYSTEM ADMINISTRATORS – Lima, 24-29 September, 2007 E-infrastructure shared between Europe and Latin America TORQUETORQUE (Tera-scale Open-source Resource and QUEue management) is a resource management providing control over batch jobs and distribuited compute resource. The Torque System is composed by a: –pbs_server –pbs_server which provides the basic batch services such as receiving/creating a batch job or protecting the job against system crashes. –job_scheduler –job_scheduler which contains the site's policy used to decide which job must be executed. –pbs_mom –pbs_mom which places the job into execution. It is also responsible for returning the job’s output to the user. What is Torque?

5. 12th EELA TUTORIAL - USERS AND SYSTEM ADMINISTRATORS – Lima, 24-29 September, 2007 E-infrastructure shared between Europe and Latin America What is a Worker Node? The Worker Node (WN) is a set of clients required to run jobs sent by the CE via the Local Resource Management System. It currently includes the: –gLite I/O Client, –the Logging and Bookkeeping Client, –the R-GMA Client and –the WMS Checkpointing library.

6. 12th EELA TUTORIAL - USERS AND SYSTEM ADMINISTRATORS – Lima, 24-29 September, 2007 E-infrastructure shared between Europe and Latin America Installing CE + Torque Server WN + Torque

7. 12th EELA TUTORIAL - USERS AND SYSTEM ADMINISTRATORS – Lima, 24-29 September, 2007 E-infrastructure shared between Europe and Latin America Preliminary and common steps Start from an instalation of SLC 3.0.8 Install JAVA SDK Remove LAM and Postfix Check the hostname Install and configure ntp daemon Install X.509 host certificates /etc/grid-security and check their file permissions. Install the latest version of glite-yaim Install the middleware

8. 12th EELA TUTORIAL - USERS AND SYSTEM ADMINISTRATORS – Lima, 24-29 September, 2007 E-infrastructure shared between Europe and Latin America Installing pre-requisites JAVA is not included in distribution. Install it separately (>= 1.4.2_08) apt-get install j2sdk

9. 12th EELA TUTORIAL - USERS AND SYSTEM ADMINISTRATORS – Lima, 24-29 September, 2007 E-infrastructure shared between Europe and Latin America Installing pre-requisites Depending on the packages set you selected when installing the operating system, it may be possible that lam package is installed on your WN. Please remove lam. apt-get remove lam There is a known installation conflict between the 'torque-clients' rpm and the 'postfix' mail client (Savannah. bug #5509). If you are going to install Torque, uninstall postfix package apt-get remove postfix

10. 12th EELA TUTORIAL - USERS AND SYSTEM ADMINISTRATORS – Lima, 24-29 September, 2007 E-infrastructure shared between Europe and Latin America Installing pre-requisites Check the FQDN hostname –Ensure that the hostnames of your machines are correctly set. Run the command: hostname -f

11. 12th EELA TUTORIAL - USERS AND SYSTEM ADMINISTRATORS – Lima, 24-29 September, 2007 E-infrastructure shared between Europe and Latin America Installing pre-requisites Syncronization among all gLite nodes is mandatory. Install ntp if not already available for your system: – apt-get install ntp Add your time server in /etc/ntp.conf –restrict mask 255.255.255.255 nomodify notrap noquery –server –(you can use ntp-1.infn.it – IP 193.206.144.10) 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 INPUT -s -p udp --dport 123 -j ACCEPT Activate the ntpd service with the following commands:  ntpdate  service ntpd start  chkconfig ntpd on –You can check ntpd’s status with :  ntpq -p

12. 12th EELA TUTORIAL - USERS AND SYSTEM ADMINISTRATORS – Lima, 24-29 September, 2007 E-infrastructure shared between Europe and Latin America Installing pre-requisites Install glite-yaim apt-get install glite-yaim-core apt-get install glite-yaim-clients

13. 12th EELA TUTORIAL - USERS AND SYSTEM ADMINISTRATORS – Lima, 24-29 September, 2007 E-infrastructure shared between Europe and Latin America Request host certificates for the CE to a CA – Copy host certificate (hostcert.pem and hostkey.pem) in /etc/grid-certificates. Change the permisions –chmod 644 hostcert.pem –chmod 400 hostkey.pem Installing pre-requisites

14. 12th EELA TUTORIAL - USERS AND SYSTEM ADMINISTRATORS – Lima, 24-29 September, 2007 E-infrastructure shared between Europe and Latin America Installing CE+Torque Server via apt 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 gLite node types. So edit once and keep it in a safe place Create a copy of /opt/glite/yaim/examples/site-info.def template (coming from the glite-yaim-core package) to your reference directory for the installation (e.g. /root/siteinfo): – cp /opt/glite/yaim/examples/site-info.def /root/siteinfo/ site-info.def A good syntax test for your site configuration file is to try to source it manually running the command: – source site-info.def

15. 12th EELA TUTORIAL - USERS AND SYSTEM ADMINISTRATORS – Lima, 24-29 September, 2007 E-infrastructure shared between Europe and Latin America Installing CE+Torque Server via apt The configuration is stored in a directory structure which will be extended in the near future. Currently the following files are used: site-info.def and the vo.d directory.

16. 12th EELA TUTORIAL - USERS AND SYSTEM ADMINISTRATORS – Lima, 24-29 September, 2007 E-infrastructure shared between Europe and Latin America Installing CE+Torque Server via apt The /root/siteinfo/vo.d directory Each file name in this directory has to be the lower- cased version of e VO name defined in site-info.def. The matching file should contain the definitions for that VO and will overwrite the ones which are defined in site-info.def. SW_DIR=$VO_SW_DIR/eela DEFAULT_SE=$CLASSIC_HOST STORAGE_DIR=$CLASSIC_STORAGE_DIR/eela

17. 12th EELA TUTORIAL - USERS AND SYSTEM ADMINISTRATORS – Lima, 24-29 September, 2007 E-infrastructure shared between Europe and Latin America Installing CE+Torque Server via apt vi /opt/glite/yaim/etc/wn-list.conf limaXX.ring.pucp.edu.pe …..

18. 12th EELA TUTORIAL - USERS AND SYSTEM ADMINISTRATORS – Lima, 24-29 September, 2007 E-infrastructure shared between Europe and Latin America Installing CE+Torque Server via apt Install the node /opt/glite/yaim/bin/yaim -i -s /root/siteinfo/site-info.def - m glite-CE Configure the node /opt/glite/yaim/bin/yaim -c -s /root/siteinfo/site-info.def -n lcg-CE_torque -n MPI_CE -n BDII_site

19. 12th EELA TUTORIAL - USERS AND SYSTEM ADMINISTRATORS – Lima, 24-29 September, 2007 E-infrastructure shared between Europe and Latin America If the installation is performed successfully, the following components are installed: –gLite in /opt/glite –Condor in /opt/condor-x.y.x (where x.y.z is the current condor version) –Globus in /opt/globus –Tomcat in /var/lib/tomcat5 –Torque in /var/spool/pbs Installing CE+Torque Server via apt

20. 12th EELA TUTORIAL - USERS AND SYSTEM ADMINISTRATORS – Lima, 24-29 September, 2007 E-infrastructure shared between Europe and Latin America Installing CE+Torque Server via apt /etc/ssh/sshd_configEdit /etc/ssh/sshd_config and add the following lines at the end: HostbasedAuthentication yes IgnoreUserKnownHosts yes IgnoreRhosts yes Restart the server with: /sbin/service sshd restart

21. 12th EELA TUTORIAL - USERS AND SYSTEM ADMINISTRATORS – Lima, 24-29 September, 2007 E-infrastructure shared between Europe and Latin America Installing CE+Torque Server via apt /etc/ssh/ssh_know_hostsOn the CE generate an updated version of /etc/ssh/ssh_know_hosts by running: edg-pbs-shostsequiv edg-pbs-knownhosts Copy that file into all the WorkerNodes.

22. 12th EELA TUTORIAL - USERS AND SYSTEM ADMINISTRATORS – Lima, 24-29 September, 2007 E-infrastructure shared between Europe and Latin America Installing WN Server via apt Install the node /opt/glite/yaim/bin/yaim -i -s /root/siteinfo/site-info.def -m glite-WN - m glite-torque-client-config Configure the node /opt/glite/yaim/bin/yaim -c -s /root/siteinfo/site-info.def -n WN_torque

23. 12th EELA TUTORIAL - USERS AND SYSTEM ADMINISTRATORS – Lima, 24-29 September, 2007 E-infrastructure shared between Europe and Latin America References https://twiki.cern.ch/twiki/bin/view/LCG/GenericInstallG uide301https://twiki.cern.ch/twiki/bin/view/LCG/GenericInstallG uide301 https://twiki.cern.ch/twiki/bin/view/LCG/YaimGuide310

24. 12th EELA TUTORIAL - USERS AND SYSTEM ADMINISTRATORS – Lima, 24-29 September, 2007 E-infrastructure shared between Europe and Latin America