v0.5.0 — Cost & Multi-Environment Operations
Engineering intent
Add operational economics and reusable environment structure without allowing cost tooling to mutate workloads automatically.
Architecture delta
- OpenCost connected to the in-cluster Prometheus design
- tested monthly node run-rate recording rule and USD 150 lab warning
- VPA recommender-only mode (
updateMode: Off) - read-only right-sizing report helper
- VPC/EKS extracted into a reusable Terraform platform module
- independent environment state/configuration retained
- active/passive multi-region DR ADR with explicit activation criteria
- dedicated Cost & Operations CI
Evidence
OpenCost/VPA chart rendering, cost-rule syntax and behavior tests, manifests and helper tooling are exercised by Cost & Operations CI. See Engineering Evidence.
Evidence boundary
The USD 150 alert is a lab node run-rate threshold, not a total AWS budget. This release did not claim real OpenCost allocation data, VPA recommendations or a tested regional failover.