CernVM-FS
Table of Contents
Dependencies
fuse: file system in user space utilities are required
Repositories
The repositories to be used can be defined with the following variable, but mind the dependencies:
variable CVMFS_REPOSITORIES ?= list( 'alice.cern.ch', 'atlas.cern.ch', 'atlas-condb.cern.ch', 'cms.cern.ch', 'lhcb.cern.ch', 'lhcb-conddb.cern.ch', 'sft.cern.ch', );
Cache Location
In case there is a need to relocate the local cache, e.g.:
variable CVMFS_CACHE_BASE ?= '/var/scratch/cvmfs';
Cache Quota
The client cache is limited to less than 4GB by default. This can be customized, e.g.:
variable CVMFS_QUOTA_LIMIT ?= 10000;
Local Proxies
The use of a local proxy is highly recommended. This variable is undefined by default and must be configured according to your location, e.g.:
variable CVMFS_HTTP_PROXY ?= 'http://SQUID_FQDN_01:3128;http://SQUID_FQDN_02:3128';
Stratum 1 Mirror Servers
Stratum 1 mirror servers should be sorted according to your location, this can be done by defining the variable:
variable CVMFS_SERVER_URL_CERN ?= nlist( 'URL-01-CERN', 'http://cvmfs-stratum-one.cern.ch:8000/opt/@org@', 'URL-02-UK', 'http://cernvmfs.gridpp.rl.ac.uk:8000/opt/@org@', 'URL-03-BNL', 'http://cvmfs.racf.bnl.gov:8000/opt/@org@', 'URL-04-FNAL', 'http://cvmfs.fnal.gov:8000/opt/@org@', );
Configuration
The configuration is done by:
include {'features/cvmfs/config'};
All the above variables can be safely configured site or cluster wide, they will only be taken into account by object profiles with:
variable CVMFS_CLIENT_ENABLED ?= true;
WARNING, if not using the standard Quattor NFS configuration, the CernVM-FS automount map (/etc/auto.cvmfs) must be added to /etc/auto.master by other means.
VO specificities
WARNING, carelessly redirecting a VO's software area towards CernVM-FS will cause all software installation jobs to fail, therefore the VO should be aware of the change.
- ALICE
No special requirements, deployment is being tracked here.
- ATLAS
Follow these instructions
The required ATLAS_LOCAL_AREA environment variable can defined using:
variable VO_ATLAS_LOCAL_AREA ?= '/path/to/shared/ATLAS/area';
- CMS
Follow these instructions
The CMS_LOCAL_SITE can be configured using:
variable VO_CMS_LOCAL_SITE ?= '<CMS shared FS>/SITECONF/local';
- LHCb
Let the VO know about the change through a GGUS ticket.
Redirect the software area (VO_LHCB_SW_DIR) to /cvmfs/lhcb.cern.ch