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Hi, there was some misunderstanding on where singularity should be run. ATLAS is requesting singularity, but is requesting it as part of the image, not as part of VAC. I can't remember if the image used by ATLAS is the naked CernVM or if something is added. One could argue that VAC as ATLAS uses it is one of the cases that doesn't need singularity because the pilots are only production ones but still we are trying to limit sites that run different things. cheers alessandra On 19/03/2019 14:30, Andrew McNab wrote: > Hi, > > Steve just mentioned that Vac and Singularity had been discussed at the ops meeting. Whilst it’s true that Vac can create Singularity (and Docker) containers alongside VMs on a factory machine, it’s not normally necessary to install Singularity (or Docker) as Vac will just disable support for containers if that's not installed and carry on. > > For more details: I gave a talk about this at CHEP 2018 and GridPP39 in September 2017. The emphasis was on Docker, and Singularity support was just added for completeness as it was straightforward to do at the same time. > > Cheers > > Andrew > > -- > Dr Andrew McNab, High Energy Physics, > University of Manchester, UK, M13 9PL. > Skype: andrew.mcnab.uk > > > > > ######################################################################## > > To unsubscribe from the TB-SUPPORT list, click the following link: > https://www.jiscmail.ac.uk/cgi-bin/webadmin?SUBED1=TB-SUPPORT&A=1 -- Respect is a rational process. \\// For Ur-Fascism, disagreement is treason. (U. Eco) ######################################################################## To unsubscribe from the TB-SUPPORT list, click the following link: https://www.jiscmail.ac.uk/cgi-bin/webadmin?SUBED1=TB-SUPPORT&A=1