DIRAC Operations Tutorial

Plan of the tutorial

• Preparation of the VirtualBox VM
• Preparation of the DIRAC service host
• Installation of the minimal DIRAC service
• Installation of the Framework DIRAC services
• Installation of the WMS services
• Submit jobs
• Extra exercise: make jobs execute on an SSH Computing Element

Important : Use Administrator Guide . Help us to improve the documentation !

Preparation of the VirtualBox VM

VirtualBox Preferences

• In VirtualBox Preferences -> Network -> Host-only Networks add vboxnet0 interface
• Import SLC6_tutorial_0.4.ova VM image (http://diracgrid.org/files/tutorial/SLC6_tutorial_0.4.ova)
• In VM Settings General -> Advanced set Shared Clipboard and Drag'n'drop to bidirectional
• In VM Settings Network Adapter 1 set to NAT, Adapter 2 set to Host-only Adapter Name: vboxnet0
• In VM Settings Shared Folders it can be convenient to define one shared folder
• Start the VM, install Guest Additions.

Preparation of the DIRAC service host

• Start the VM and login as root, the su dirac

• Check the host accessibility by ssh:

  $ ifconfig

  Note the IP address of the eth1 interface, e.g. 192.168.56.101 From the host terminal do:

  $ ssh root@192.168.56.101

  Edit /etc/hosts. Add

  192.168.56.101 dirac.cern.ch dirac

• Remove firewall restrictions in the VM - run as root:

  $ system-config-firewall-tui

• Follow instructions in /home/dirac/Tutorial/README file to prepare the host

• Copy generated CA certificates to /opt/dirac/etc/grid-security/certificates

• Copy generated host certificates to /opt/dirac/etc/grid-security

• IMPORTANT Do:

  $ export X509_CERT_DIR=/opt/dirac/etc/grid-security/certificates

• Hint: make a copy of the resulting /opt/dirac directory. If something goes wrong it will help to restart from this point.

Installation of the minimal DIRAC service

• Edit install_minimal.cfg configuration file

• Install minimal set of the DIRAC services with:

  $ ./install_site install_minimal.cfg

  Hint: Populate /opt/dirac/.installCache with files in /home/dirac/Externals

• Make DIRAC services start at boot time (See the Administrator Guide)

• • Install /opt/dirac/sbin/runsvdir-start script
• • Add file /etc/init/dirac.conf

• Reboot the VM

Installation of the framework services

• Edit install_framework.cfg

• Install framework services with

  $ dirac-setup-site install_framework.cfg

Installation of the WMS services

• Install WMS components using the SystemAdministrator Console. Run as dirac_admin user:

  $ dirac-admin-sysadmin-cli --host dirac.cern.ch

• Install components using install command

• Hint: The list of components to install can be looked up in the install_wms.cfg

Submit jobs

• Add a dirac VO to the DIRAC Registry, make dirac_user group belong to this VO
• Submit jobs using the Web Portal Launchpad application as user in the dirac_user group

That's it !

Extra exercise: make jobs execute in an SSH Computing Element

• Configure an SSH Computing Element on the same host as the DIRAC server or on any other host accessible with an SSH account
• Create dirac_pilot group and a pilot user
• Configure the /Operations/Defaults/Pilot section
• Launch SiteDirector sending pilots to the SSH Computing Element