Requirements

Component	Version	Notes
Server	JDK 25	The image includes it
Client and starter	JDK 21 or later
cosky-migrate	JDK 21 or later
Building from source	JDK 21 and JDK 25	Gradle does not download them
Spring Boot	4.1	For the starter
Spring Cloud	2025.1	Declares Spring Boot 4.0, so set spring.cloud.compatibility-verifier.enabled: false until 2026.0
Redis	7.0 or later, with maxmemory-policy noeviction	The server checks both at start, and refuses to run otherwise
Valkey	8
Kubernetes	Anything with Kustomize	The manifests were checked with kubectl kustomize, and have not run on a real cluster yet
Browser	A current Chrome, Edge, Firefox or Safari	Only Chrome is tested

Every pull request runs against Redis 7.0, Redis 7.4 and Valkey 8, on a single node and a Redis Cluster.

Dependencies

Library	Version
Kotlin	2.4, compiled to Java 21. Compiling against it takes Kotlin 2.3 or later.
gRPC	1.81
Protobuf	4.34
Spring gRPC	1.1
Lettuce	7.5

cosky-bom manages the versions of the CoSky modules. Spring Boot's and Spring Cloud's own BOMs manage the rest.