Due to technical problems on the CERN SSO system, logging in is currently failing intermittently.
Apr 15 – 19, 2013
CNAF Bologna (Italy)
Europe/Rome timezone

High Availability Load Balancing in the Agile Infrastructure (CERN)

Apr 17, 2013, 2:50 PM
CNAF Bologna (Italy)

CNAF Bologna (Italy)

Presentation IT Infrastructure, Services, Business Continuity IT Infrastructure


Mr Evangelos (Vaggelis) Atlidakis (CERN)


This presentation describes several Load Balancing paradigms of services within our puppet managed, CERN private, Openstack cloud. Our primary Load Balancer is HAProxy, which is combined with Corosync/Pacemaker cluster engine or DNS Load balancer. Specifically, we create small clusters of Load Balancers behind a service IP to guarantee front end failover. The aforementioned Load Balancers redirect traffic to a cluster of backed servers, ensuring High Availability of CERN services.

Primary author

Presentation materials