Thursday, 21 May 2015

Juno, EL6 and RDO Community.

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Since 2011, CERN selected OpenStack as a cloud platform. It was natural to choose RDO as our RPMs provider ; RDO is a community of people u...
6 comments:
Tuesday, 12 May 2015

Our cloud in Juno

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This blog continues our series around upgrades of OpenStack. Previous upgrades are documented in Our Cloud in Havana Our cloud in Icehous...
7 comments:
Tuesday, 5 May 2015

Purging Nova databases in a cell environment

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CERN cloud infrastructure is running in production since July 2013 and during almost 2 years more than 1,000,000 production VMs were creat...
1 comment:
Monday, 23 March 2015

Not all cores are created equal

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Within CERN's compute cloud, the hypervisors vary significantly in performance. We generally run the servers for around 5 years before r...
1 comment:
Saturday, 21 March 2015

Nova quota usage - synchronization

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Nova quota usage gets frequently out of sync with the real usage consumption. We are hitting this problem since a couple of releases and it...
1 comment:
Tuesday, 17 February 2015

Delegation of rights

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At CERN, we have 1st and 2nd level support teams to run the computer centre infrastructure. These groups provide 24x7 coverage for problems ...
1 comment:
Thursday, 5 February 2015

Choosing the right image

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Over the past 18 months of production at CERN, we have provided a number of standard images for the end users to use when creating virtual m...
6 comments: