RALnonLHCCVMFS

CernmVM-FS Stratum 0 for non-LHC VOs

RAL Tier1 is currently hosting CernVM-FS Stratum-0 repositories for several non-LHC VOs.

Stratum-0 v2.0 repositories are replicated on the local LHC Stratum-1 server. Stratum-0 v2.1 repositories are replicated by the dedicated EGI CernVM-FS Stratum-1 server located at RAL.

Setting up a site to access small VOs CernVM-FS repositories located at RAL

Assuming that your site is already supporting CernVM-FS (client v2.1.X) for LHC VOs, these are the configurations needed to access the na62, mice, hone, wenmr, phys-ibergrid, hyperk, t2k, glast and cernatschool CernVM-FS areas.

On each worker node create the /etc/cvmfs/domain.d/gridpp.ac.uk.conf file

[root@lcg0999 ~]# cat /etc/cvmfs/domain.d/gridpp.ac.uk.conf
CVMFS_PUBLIC_KEY=/etc/cvmfs/keys/gridpp.ac.uk.pub
CVMFS_SERVER_URL="http://cvmfs-egi.gridpp.rl.ac.uk:8000/cvmfs/@org@.gridpp.ac.uk;http://cvmfs01.nikhef.nl/cvmfs/@org@.gridpp.ac.uk"

Note 1: If you're using puppet module to configure the CernVM-FS clients, then it is not possible to define 'gridpp.ac.uk' CernVM-FS domain for the time being. Only solution is configuration per VO. The table below shows the current status at UK sites.

Stratum-0 repos status at RAL

VO	Stratum-0 v2.0	Stratum-0 v2.1
mice	yes	yes
na62	yes	yes
hone	yes	yes
phys.vo.ibergrid.eu	yes	yes
enmr.eu	yes	yes
hyperk.org	no	yes
t2k.org	no	yes
glast.org	no	yes
cernatschool.org	no	yes
biomed	no	yes

CernVM-FS clients configuration at UK sites

Site	gridpp.ac.uk domain	per VO configuration
RAL Tier-1	yes
RALPP		yes
ICL	yes
LIV
QMUL	yes(?)
OX		yes
GLA	yes
SHEF
MANC		yes

Note 2: If your CernVM-FS clients are at v2.0.X, then on each WN, in /etc/cvmfs/default.local the CVMFS_REPOSITORIES variable should contain the names of the repositories i.e.

CVMFS_REPOSITORIES=atlas.cern.ch,atlas-condb.cern.ch,cms.cern.ch,lhcb.cern.ch,sft.cern.ch,
     lhcb-conddb.cern.ch,mice.gridpp.ac.uk,na62.gridpp.ac.uk,hone.gridpp.ac.uk,
     wenmr.gridpp.ac.uk,phys-ibergrid.gridpp.ac.uk,hyperk.gridpp.ac.uk,t2k.gridpp.ac.uk,
     glast.gridpp.ac.uk,cernatschool.gridpp.ac.uk

The above mentioned setting is no longer needed on CernVM-FS clients v2.1.X if you have a configuration defined in /etc/cvmfs/domain.d/.

Note 3: Also if your CernVM-FS clients are at v2.0.X, they won't be able to access the Stratum-0 v2.1 repositories, therefore the CVMFS_SERVER_URL variable should look like

CVMFS_SERVER_URL="http://cernvmfs.gridpp.rl.ac.uk:8000/opt/@org@.gridpp.ac.uk;http://cvmfs-stratum-one.cern.ch:8000/opt/@org@.gridpp.ac.uk"

in /etc/cvmfs/domain.d/gridpp.ac.uk.conf file. As a consequence the glast, t2k, hyperk and cernatschool repositories will not be accessible by CernVM-FS clients v2.0 (upgrade to v2.1.X is recommended).

In addition, also in /etc/cvmfs/default.local you must specify the names of your local site squids (regardless CernVM-FS client version):

CVMFS_HTTP_PROXY="http://first.squid.domain:3128;http://second.squid.domain:3128"

We use a single pair of masterkeys (private and public) to sign all cvmfs stratum-0 repositories and the public key is needed for authentication at cvmfs client level.

[root@lcg1060 ~]# cat /etc/cvmfs/keys/gridpp.ac.uk.pub
-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAp7C4KDvOIEVJepuAHjxE
EES1sDdohz0hiU6uvSqxVYjKVR4Y4/0I/D/zLijQI+MHR7859RN0/6fsZ3b3At3l
UbvNfqq6DN1zVjjd0xagC6SMBhSfj/iQKQSsG8MXSyiNmM8YalVHJSPqoova6CPE
EgLEjnHKTNEogTNjKBwbP2ELPLkfVoNoxxrXPSox7aln8JdgyZzZlBwm98gnFa1v
JTVAl0HQnUJ6cjMwO31wIGVMdvZ+P962t+2bPGfOCm6Ly6BusXcLoIIeez5SBerB
aHz//NSTZDbHVNPEqpoo1AQVVOo4XJmqo64jBa3G4Dr0zSda1bkZMVhsyUtjhfEB
DwIDAQAB
-----END PUBLIC KEY-----

A RPM installing the public key and the gridpp.ac.uk.conf file is available and can be provided at request (catalin.condurache@stfc.ac.uk)

The last requirement is that the site local squid(s) are configured to use the stratum-1 server at RAL.

Also do not forget to define the following environment variables:

- for mice users/jobs

VO_MICE_SW_DIR=/cvmfs/mice.gridpp.ac.uk

- for na62 users/jobs

VO_NA62_VO_GRIDPP_AC_UK_SW_DIR=/cvmfs/na62.gridpp.ac.uk

- for hone users/jobs

VO_HONE_SW_DIR=/cvmfs/hone.gridpp.ac.uk

- for enmr.eu users/jobs

VO_ENMR_EU_SW_DIR=/cvmfs/wenmr.gridpp.ac.uk

- for phys.vo.ibergrid.eu users/jobs

VO_PHYS_VO_IBERGRID_EU_SW_DIR=/cvmfs/phys-ibergrid.gridpp.ac.uk

- for hyperk.org users/jobs

VO_HYPERK_ORG_SW_DIR=/cvmfs/hyperk.gridpp.ac.uk

- for t2k.org users/jobs

VO_T2K_ORG_SW_DIR=/cvmfs/t2k.gridpp.ac.uk

- for cernatschool.org users/jobs

VO_CERNATSCHOOL_ORG_SW_DIR=/cvmfs/cernatschool.gridpp.ac.uk

- for glast.org users/jobs

VO_GLAST_ORG_SW_DIR=/cvmfs/glast.gridpp.ac.uk