Cloud Run makes highly available, multi-region services easier

New capabilities enhance multi-region Cloud Run services by automatically detecting regional disruptions and failing over to healthy regions within seconds. This is achieved through readiness probes for instance-level health checks and service health aggregation, which provide an aggregate view of service health per region.

Readiness probes offer instance-level health checks for Cloud Run containers, determining when they are ready to serve traffic and monitoring the number of healthy or unhealthy instances per region. This allows for granular health insights crucial for high availability scenarios.

Service health aggregates readiness probe data to calculate the overall health of a Cloud Run service in each region. This aggregate health is exposed through serverless network endpoint groups (NEGs) and integrates with global application load balancers for automatic traffic failover.

The enhanced multi-region capabilities can be configured for both public-facing applications using a global external application load balancer, and private applications using a cross-regional internal application load balancer for automated detection and failover.

When designing multi-region setups, consider eliminating single points of failure at each application layer, ensuring data replication across regions with consideration for recovery point objectives, and leveraging Google Cloud's multi-region database solutions for data residency requirements.

Cloud Run's enhanced multi-region high availability services are available at no additional cost in all Cloud Run regions. Users only pay for the standard CPU and memory utilized by the readiness probes.