We are having an issue with a primary load balancer. Hosted sites and www.ibiblio.org are impacted. Will update here as we make progress.
UPDATE 17:10 Tuesday - primary is back up. We do not seem to have a proper secondary. We are going to leave the primary as-is and investigate. We are scheduling maintenance for tomorrow (Wednesday) morning to resolve and have a proper High Availability (HA) pair, but making any more changes before we investigate further seems unwise at this time.