High Availability & Scalability
K8s + PostgreSQL 16
Production-grade Kubernetes clustering with Infinispan distributed caching, persistent sessions, blue-green deployments, and PostgreSQL 16 as the primary datastore.
How It Works
Technical Highlights
Architecture Overview
The HA deployment runs Keycloak as a StatefulSet across multiple Kubernetes pods behind a layer-7 load balancer. Infinispan provides distributed session caching with cross-site replication, while PostgreSQL 16 handles persistent storage with streaming replication for automatic failover.
Session Persistence
User sessions and authentication states are replicated across all Keycloak pods via Infinispan’s distributed cache with synchronous replication. Session affinity is maintained at the load balancer level, but any pod can serve any session, ensuring zero-downtime rolling updates and seamless failover.
Disaster Recovery
Blue-green deployment strategy allows instant rollback on failed upgrades. PostgreSQL streaming replication provides a hot standby with sub-second failover, and Infinispan cross-data-center replication enables active-passive DR configurations with RPO under 1 second across availability zones.
Why in 2026
99.99% uptime is table stakes. HA Keycloak on K8s with proper session persistence makes it achievable.
Related service package: Production HA Cluster
Delivery: 4–6 weeks
Ready to implement High Availability & Scalability?
Fixed price. Clear scope. 30-day warranty.