Atlas Specific installation

ATLAS frontier Squid

CernVMFS

For software distribution, LHC experience use a specific software called CernVMFS. It allow site to directly use software installation from CERN into a computing machine.

To install CernVMFS, we need to install those RPM.

yum install https://ecsft.cern.ch/dist/cvmfs/cvmfs-release/cvmfs-release-latest.noarch.rpm
yum install cvmfs

After what, you must create a /etc/cvmfs/default.local file. This looks like

CVMFS_REPOSITORIES="`echo $(ls /cvmfs)|tr ' ' ,`"
CVMFS_CACHE_BASE=/var/cache/cvmfs
CVMFS_QUOTA_LIMIT=20000
CVMFS_HTTP_PROXY="http://squid.najah.edu:3128"

Testing software

ATLAS provide some features to test a machine called diagnostics to run it, you will need to load ATLAS environnement and run some tests

alias atlasSetup='export ATLAS_LOCAL_ROOT_BASE=/cvmfs/atlas.cern.ch/repo/ATLASLocalRootBase; source $ATLAS_LOCAL_ROOT_BASE/user/atlasLocalSetup.sh'
atlasSetup
diagnostics

The full test is called supportInfo. This is a very helpfull tools but as a site administrator you probably haven’t got access to the grid or to ATLAS data all those test will fail but this test could provide you some usefull information

A very usefull test is checkOS, it just check if your machine have all RPM needed by ATLAS installed. If not, it will give you a list of file you must check.