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HEPiX Virtulisation WG notes 2010-10-04
Present (in no particular order):
Tony Cass, CERN
Thomas Finnern, DESY
Owen Synge, DESY
Ian Gable, University of Victoria
Martin Bly, RAL
Jie Tao, KIT
Ulrich Schwickerath, CERN
Romain Wartel, CERN
Abdeslem Djaoui, RAL
Ian Collier, RAL
Regrets from:
Keith Chadwick, FNAL
Dave Kelsey, RAL
Andrea Chierici, INFN
1. Comments on the previous minutes
- Tony followed up with Sebastian with regard to some text on contextualization. He will distribute it.
- Owen has arranged to come to CERN on October 14th.
- Tony presented the information on site to machine signalling at the WLCG management board. The board was positive.
- CERNFS will be a supported service from CERN IT. A security audit will be performed on it. Martin asked if the outcome of the security audit will determine if CERN IT will operate CVMFS. Tony commented that he expected that the outcome of the audit would be that the CVMFS developers would patch security holes if found, rather then the service being rejected outright.
2. Image catalogue progress
- Owen is currently stuck on how to sign the meta data exchanged between hosts.
- Owen is happy with the version of the code which Romain and Ulrich have based their work.
- Romain is moving the VMIC from test to production service at CERN. This version has no inter site communication via WAN. Romain solicited contributions to the WAN components.
- People are invited to attend the VMIC meeting on October 14th at CERN (Owen is travelling to CERN).
- Tony asked who would be able to deploy and test the VMIC at their site. Owen would like DESY to participate, but can't make the commitment on behalf of DESY. Martin would like RAL to participate after some of the WAN components of the catalogue are developed.
- Ian Gable asked that the source code be made available. Owen and Romain will produce a version suitable to be committed to sourceforge, and Owen will make the commit.
3. CVMFS at RAL
- Ian Collier is working to evaluate CVMFS at RAL on regular worker nodes.
- Their setup consists of 500 some worker nodes, and one squid proxy.
- They have completed some 16000 jobs, and initial results look promising. The squid proxy server did a maximum of 20 MB/s I/O at the start of the run and little after that.
- They are provided feedback to the developers with regard to how the documentation can be improved. They found the documentation to be geared mostly for Tier-3s.
4. Any other Bussiness
- Owen asked if we should consider chroot as supported virtualization technology. Owen pointed to the advantes in disk and network IP provided by chroot. Tony commented that it's something we could consider if there was demand, but he sees mostly demand for Xen and KVM.
- Abdeslem commented that he would to see only a limited number of host OS supported to simplify in terms of compatibility of images. Owen commented that since we weren't making any software that dealt with this he didn't see the need to impose constraints. Tony commented that he didn't think that this was an area where we had to provide support, but he did recognize that it may be a a problem.
5. Next meetings
- The next meeting will be held October 15, 14:00 UTC
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