You just deployed Keycloak for identity management and added New Relic for monitoring. Both are powerful alone. Together, they can either be a dream of secure observability or a foggy mess of misaligned tokens and unlabeled metrics. Most teams find out which one they have the hard way—when the first audit comes knocking.
Keycloak handles authentication and authorization through OpenID Connect and SAML. It gives your services a single source of truth for user identities. New Relic tracks performance and traces what happens inside those services. When you connect them correctly, every log and span can tell you not just what happened but who triggered it.
Here’s the logic. Keycloak issues identity tokens. New Relic collects data from your applications. Instrument your service layer so each trace includes a user or service identity from Keycloak. That way, latency reports and error graphs start linking to real access events. Suddenly “why did that API spike?” becomes “which user session caused it?” Instead of chasing ghosts, you’re reading the fingerprints.
How do I connect Keycloak and New Relic?
You link your application’s telemetry context to Keycloak-issued claims. Add an interceptor that extracts identity information from every incoming request and attaches it to your New Relic spans or logs. This creates trace-level attribution for users, roles, or even client IDs without exposing sensitive tokens. Use OIDC claims or JWT metadata; it works with most frameworks.
Best practices for keeping Keycloak New Relic clean
Rotate credentials often, especially if you use service accounts or automated agents. Map roles consistently across environments, so “admin” in Keycloak matches “admin” in your observability rules. Set clear alert thresholds for authentication errors. Those spikes usually hint at expired keys or misconfigured proxy calls, not at actual load problems.