Overview

Operate Keycloak with confidence at scale, from single site clusters to resilient multi site deployments. Running identity in production is unforgiving. Misaligned defaults, brittle proxies, and untuned databases turn into slow logins and night alerts. This book gives platform and security teams a clear system model, practical defaults, and tested runbooks so Keycloak stays fast, available, and easy to maintain. Across Kubernetes, PostgreSQL, and global routing, you get specific patterns that reduce risk and keep user flows smooth. Every recommendation is tied to observable outcomes, with steps you can apply in regulated environments and high traffic estates. Standardize versions and operational defaults, set RTO, RPO, and SLOs that leadership understands Install and run with the Kubernetes Operator, wire hostname and ingress, terminate TLS correctly at edge or service Set probes on the management interface on 9000, add PodDisruptionBudget, and HPA that scales without churn Configure NGINX and HAProxy for cookie stickiness on AUTH_SESSION_ID, healthy backends, and safe retries Tune timeouts and keepalive across layers, drain gracefully during rolling updates Choose managed PostgreSQL topologies, add PgBouncer transaction pooling, and size Agroal with JDBC settings that hold under load Keep event and session tables healthy with autovacuum, WAL, and bloat control tuned to write patterns Design multi site active active, secure or avoid cross site caches, and run health based global cutovers with rollback Expose health and metrics on the private management port, scrape with Prometheus, alert on latency, errors, and burn rate Build Grafana dashboards for cluster and tenant views, tie panels to SLOs that page only when users feel pain Harden security with TLS policy, HSTS, CSP and frame headers, admin isolation, network policy, and bastion patterns Apply brute force detection and edge rate limits that protect without false positives Manage secrets with provider hygiene, note FIPS constraints for crypto and images Ship optimized builds and container images, set start flags and memory options that keep latency steady Block unsafe rollouts in CI with update compatibility checks and policy gates Back up the database first, export configuration for portability, and plan rolling versus recreate updates Run maintenance with persistent sessions to limit impact, communicate windows with clear playbooks Use field recipes for game days, pod loss, database failover, cache partition drills, cutover runbooks, and preflight checks This edition includes ready to use drills, preflight checklists for staging and production, and a post incident review template with quality metrics that drive real improvements. It is a code heavy guide with working YAML, Bash, HAProxy, NGINX, and JSON snippets you can adapt to your environment without guesswork. Grab your copy today and run Keycloak with calm, clear, repeatable operations.

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