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Revision 572013-10-17 - PaoloVeronesi

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Sita Admin Corner

National Squid service for CVMFS

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If you are going to run jobs on your cluster using CernVM-FS you should also use squids to cache data at your site. In case you decide to not install a squid service at your site, Italian NGI provide a National squid service accessible only by registered italian sites.
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If you are going to run jobs on your cluster using CernVM-FS you should also use squids to cache data at your site. In case you decide to not install a squid service at your site or in case of failover at your site, Italian NGI provide a National squid service accessible only by registered italian sites.
  We have two squids with ACLs based source and destination. If you decide to use this service, please contact igi-noc@lists.italiangrid.it providing:
  • the network information of your WNs (eg 131.154.101.0/255.255.255.0);
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  Eg. for VO gridit: /etc/cvmfs/config.d/gridit..conf:CVMFS_HTTP_PROXY="http://squid01.cnaf.infn.it:3128|http://squid02.cnaf.infn.it:3128"
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Using National Squid service for failover

If you run local squid service, you can also add the national squid servers for failover case. CVMFS_HTTP_PROXY is used to specify the squid server(s) to be used for local caching. It supports both load balance and failover:

Configuration test for failover

Thanks to E. Mazzoni, INFN-PISA.
# cmssquid.pi.infn.it and cmssquid2.pi.infn.it primary group, squid01.cnaf.infn.it and squid01.cnaf.infn.it failover group

# Normal behaviour
[root@stormgf1 ~]# cvmfs_talk -i belle.cern.ch proxy info
Load-balance groups:
[0] http://cmssquid.pi.infn.it:3128, http://cmssquid2.pi.infn.it:3128
[1] http://squid01.cnaf.infn.it:3128, http://squid02.cnaf.infn.it:3128
Active proxy: [0] http://cmssquid.pi.infn.it:3128 

# Failover behaviour (cmssquid.pi.infn.it and cmssquid2.pi.infn.it denied by acl on router)
[root@stormgf1 ~]# cvmfs_talk -i belle.cern.ch proxy info
Load-balance groups:
[0] http://cmssquid2.pi.infn.it:3128, http://cmssquid.pi.infn.it:3128
[1] http://squid02.cnaf.infn.it:3128, http://squid01.cnaf.infn.it:3128
Active proxy: [1] http://squid02.cnaf.infn.it:3128 
 

Table

List of the cvmfs servers and sites supported by national squid server.
cvmfs servers
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Sites Note
IGI-BOLOGNA primario
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INFN-PERUGIA primario
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UNI-PERUGIA primario
 
INFN-PISA failover
INFN-ROMA2 primario
 
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