Speaker
Description
Historically at the RAL Tier-1 we have always directly exposed public-facing services to the internet via static DNS entries. This is far from ideal as it means that users will experience connection failures during server maintenance (both planned and unplanned) and any changes to the servers behind a particular service require DNS changes. Since April we have been using in production HAProxy and Keepalived to facilitate a highly-available load balancer in front of FTS3 in order to avoid the issues resulting from the use of DNS aliases. We are also making extensive use of HAProxy and Keepalived for our OpenStack cloud which is under development. Here we will describe our setup, experience with load balancers for FTS3 and OpenStack as well as our progress and plans for other services.
