Resilience in Practice: Regional Failover at Clerk
Blog post from Clerk
Clerk recently tested its automatic regional failover system, a crucial upgrade designed to protect against large-scale outages, during an incident on August 6th when their primary cloud region experienced intermittent disruptions. During the outage, traffic was successfully rerouted to a failover region, ensuring that customers experienced minimal disruption, aside from a slight increase in API latency. This event highlighted the importance of resilience for Clerk, given its role as an authentication provider whose services are integral to customer applications. The new failover system runs continuously, ensuring readiness and seamless traffic rerouting during outages, with data storage replicated to minimize latency. Clerk plans to further enhance resilience by increasing the robustness of stateful systems, exploring multi-cloud redundancy, and automating recovery processes. The successful handling of this incident validated their regional failover strategy and demonstrated a positive return on investment as they work to expand their resilience capabilities.
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