Third EELA Tutorial for Managers and Users E-infrastructure shared between Europe and Latin America CE + WN installation and configuration Vanessa Hamar Universidad de Los Andes – Mérida, Venezuela Rio de Janeiro 26-30, 2006

Third EELA Tutorial for Managers and Users 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

Third EELA Tutorial for Managers and Users 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).

Third EELA Tutorial for Managers and Users 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?

Third EELA Tutorial for Managers and Users 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.

Third EELA Tutorial for Managers and Users E-infrastructure shared between Europe and Latin America Installing CE + Torque Server WN + Torque

Third EELA Tutorial for Managers and Users E-infrastructure shared between Europe and Latin America Start from a fresh install of SLC 3.0.X Installation via –Starting from gLite release 3.0 the installation via gLite installer scripts is not supported. –APT rpm -qa | grep apt Install apt if necessary: rpm -ivh cnc6-8.SL.cern.i386.rpmhttp://linuxsoft.cern.ch/cern/slc30X/i386/SL/RPMS/apt cnc6-8.SL.cern.i386.rpm Installation will install all dependencies, including –other necessary gLite modules –external dependencies Installing pre-requisites

Third EELA Tutorial for Managers and Users E-infrastructure shared between Europe and Latin America Installing pre-requisites JAVA is not included in distribution. Install it separately (>= 1.4.2_08) chmod +x j2sdk-1_4_2_08-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%]

Third EELA Tutorial for Managers and Users 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 possibile 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

Third EELA Tutorial for Managers and Users 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

Third EELA Tutorial for Managers and Users E-infrastructure shared between Europe and Latin America Installing pre-requisites Install glite-yaim and gilda_ig-yaim packages on your nodes Download and install latest version of glite-yaim * on all your grid nodes: MS.Release3.0/ MS.Release3.0/ rpm -hiv glite-yaim noarch.rpm Preparing... ########################################### [100%] 1:glite-yaim ########################################### [100%]

Third EELA Tutorial for Managers and Users E-infrastructure shared between Europe and Latin America Download and install the latest version of gilda_ig- yaim * on all your grid nodes: root]# rpm -hiv gilda_ig-yaim noarch.rpm Preparing... ########################################### [100%] 1:gilda_ig-yaim ########################################### [100%]

Third EELA Tutorial for Managers and Users 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 If you plan to use certificates released by unsupported EGEE CA’s, be sure that their public key and CRLs (usually distributed with a rpm) are installed. –The CRL of the VO GILDA are available from Installing pre-requisites

Third EELA Tutorial for Managers and Users 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 nomodify notrap noquery –server –(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 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

Third EELA Tutorial for Managers and Users E-infrastructure shared between Europe and Latin America Installing CE+Torque Server via apt Add gLite apt repository: –Put one this line in a file (e.g. glite.list) inside the /etc/apt/sources.list.d directory –apt-get update –apt-get upgrade

Third EELA Tutorial for Managers and Users 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 lcg-yaim RPM) to your reference directory for the installation (e.g. /root): – cp /opt/glite/yaim/examples/gilda_ig-site-info.def /root/my-site-info.def A good syntax test for your site configuration file is to try to source it manually running the command: – source my-site-info.def

Third EELA Tutorial for Managers and Users E-infrastructure shared between Europe and Latin America Installing CE+Torque Server via apt vi /opt/glite/yaim/examples/gilda_wn-list.conf

Third EELA Tutorial for Managers and Users E-infrastructure shared between Europe and Latin America Installing CE+Torque Server via apt Install the node /opt/glite/yaim/scripts/gilda_ig_install_node gilda_ig-site-info.def GILDA_ig_CE_torque Configure the node /opt/glite/yaim/scripts/gilda_ig_configure_node gilda_ig-site-info.def GILDA_ig_CE_torque

Third EELA Tutorial for Managers and Users 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

Third EELA Tutorial for Managers and Users 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

Third EELA Tutorial for Managers and Users 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: /opt/edg/sbin/edg-pbs-knownhosts Copy that file into all the WorkerNodes.

Third EELA Tutorial for Managers and Users E-infrastructure shared between Europe and Latin America Installing WN Server via apt Install the node /opt/glite/yaim/scripts/gilda_ig_install_node gilda_ig-site- info.def GILDA_ig_WN_torque Configure the node /opt/glite/yaim/scripts/gilda_ig_configure_node gilda_ig- site-info.def GILDA_ig_WN_torque

Third EELA Tutorial for Managers and Users E-infrastructure shared between Europe and Latin America References

Third EELA Tutorial for Managers and Users E-infrastructure shared between Europe and Latin America