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Information for maintainers of the training material

This file contains the information an recepies for preparing new materials for ROOT tutorials

Building the CernVM image

To build a new OVA image customized for the tutorials, is best to do it from a CernVM running image. Follow the next instructions:

  • Get the RAW image (under KVM) of the latest stable CernVM release from the CernVM download area
  • Prepare a userdata file to contextualize the VM image. Here is an example:
#!/bin/sh
. /etc/cernvm/site.conf
echo "source /cvmfs/sft.cern.ch/lcg/root-training-setup.sh" > /etc/profile.d/tutorial-setup.sh
exit

[amiconfig]
plugins=cernvm cernvm_appliance rapadminpassword

[rpath]
rap-password=

[cernvm_appliance]
password=

[cernvm]
organisations=HEPSOFT
repositories=hepsoft,sft
shell=/bin/bash
config_url=http://cernvm.cern.ch/config
users=user:hepsoft:$6$IafNtgu.$BdxurdZpW8bNHks8p2FFHr/qBGh9FSQg3zBgh90PPsSSHWn8dTMc78ltCQf/W99tPX/7v.wlRGzudvvYQzVHw1
edition=Desktop
screenRes=1024x768
keyboard=us-acentos
startXDM=on
auto_login=on
desktop_icons=README,CltEZXNrdG9wIEVudHJ5XQpWZXJzaW9uPTEuMApUeXBlPUFwcGxpY2F0aW9uCk5hbWU9UkVBRE1FCkNvbW1lbnQ9CkV4ZWM9ZmlyZWZveCBodHRwczovL2dpdGh1Yi5jb20vcm9vdC1taXJyb3IvdHJhaW5pbmcvYmxvYi9tYXN0ZXIvUkVBRE1FLm1kCkljb249L3Vzci9zaGFyZS9pY29ucy9yb290Ni5wbmcKUGF0aD0KVGVybWluYWw9ZmFsc2UKU3RhcnR1cE5vdGlmeT1mYWxzZQo=

[ucernvm-begin]
cvmfs_branch=cernvm-prod.cern.ch

[ucernvm-end]
  • Several remarks about the userdata file
    • Note the setup script located in CVMFS and the reference made in /etc/profile.d/tutorial-setup.sh
    • The desktop icon README has been generated using cat Desktop/README.desktop | base64 -w0 after a launcher has been created called README in the Desktop.
  • Generate the final image with the command cvm2ova -n ROOT-Tutorial -d 10000 -m 1024 -i cernvm-3.6.5.hdd -u userdata -o. This one is using version 3.6.5 of CernVM, 1 GB memory and 10 GB hard disk.
  • Copy the resulting image called ROOT-Tutorial.ova to the host or upload it to the GitHub site