kubernetes-java

Kubernetes deployments for Spring Boot require rolling update strategies, readiness and liveness probes, and graceful shutdown settings to minimize downtime. Production-ready manifests apply securityContext hardening and JVM container behavior tuning to ensure safe rollouts during updates.

Sizing JVM resources and configuring the HorizontalPodAutoscaler requires setting sensible resource requests and limits for Java containers. Pairing HPA with PodDisruptionBudgets maintains high availability during voluntary disruptions and pod scaling events.

Wiring ConfigMaps and Secrets to Spring Boot properties uses secretKeyRef and configMapRef references in Kubernetes manifests. This securely injects external configuration into the deployment environment without hardcoding sensitive data in the container image.

Service and Ingress routing for Spring Boot endpoints requires defining Kubernetes Service objects to expose pods and Ingress rules to route external traffic. Correct configuration maps ingress paths to the appropriate Spring Boot service ports.

Helm charts are not strictly required but provide a best-practice structure for managing Kubernetes manifests across environments. Using Helm charts for Java applications streamlines environment and namespace guidance for complex deployment configurations.

Spring Boot pods fail readiness checks during rolling deployments when liveness and readiness probes are misconfigured or lack graceful shutdown settings. Correct probe configuration and JVM container behavior tuning prevent premature traffic routing and deployment failures.