Keycloak is the go-to for managing identity and access in modern applications. But making it work smoothly with Kubernetes often comes down to one critical bridge: the Ingress resources that route users into your Keycloak instance without breaking session flows or exposing unwanted endpoints. Without the right Ingress setup, you risk authentication loops, SSL headaches, or worse—open attack surfaces.
The key lies in mapping requests with precision. In Kubernetes, an Ingress resource defines how external traffic reaches services inside the cluster. For Keycloak, that often means creating rules for both HTTP and HTTPS, ensuring all callbacks and token endpoints are available on predictable, secure URLs. The wrong hostname or path can block logins silently.
Set up your Ingress annotations to handle SSL passthrough or to let an ingress controller—NGINX, HAProxy, Traefik—terminate TLS cleanly. Use rewrite-target annotations only when necessary to match Keycloak’s expected paths. Wildcard certificates can simplify domain setups but must be paired with strict routing rules. If you enable admin endpoints through the same Ingress, lock them down. Separate rules for public and internal routes keep your identity server clear of unwanted traffic.