A software engineering intern at Couchbase describes the design and implementation of a Test Matrix Pipeline for the Couchbase Autonomous Operator (CAO). The pipeline continuously validates compatibility across four dimensions: Kubernetes/OpenShift versions, CAO versions, Couchbase Server versions, and cloud providers (EKS, GKE, AKS). Built on Jenkins and orchestrated by three Go programs (dispatch, execute, rerun), the pipeline generates all version combinations when any component changes, filters tests using a YAML-based tagging system (trigger tags, version constraints, subcomponent tags), and handles infrastructure failures with incremental result persistence and a dedicated rerun stage. The post also covers the challenges of parallelizing test execution, including resource contention, varying isolation requirements, and result tracking complexity, proposing a Scenario Aggregator approach to group shared vs. isolated tests.
