v2.1.0 — multicloud

The multicloud release: the inventory API runs on AWS, talks to its partner API on Google Cloud through an orchestrator, and is observable end to end.

Cross-cloud integration

• GET /v2/items/:id adds a partner block with a record fetched live from the other cloud (ok, unavailable or disabled; never an error).
• GET /v2/interop/random hands one item to the other cloud in a domain-agnostic contract.
• POST /v2/interop/messages is this API's step in the flow: appends an item to the message and stores the accumulated JSON in object storage. ?itemId= picks the item, so a live change shows up in the next message.
• Partner records are cached for 30 s, failures never are, and DELETE /v2/interop/cache forces a refresh.
• Every route under /v2 also answers under /api/v2.
• X-Correlation-Id is honoured, generated when missing, returned and logged.

Kubernetes

• Liveness and readiness probes, requests and limits, ConfigMap and Secret.
• Horizontal autoscaling from 2 to 6 replicas on CPU.
• A PodDisruptionBudget and do-not-disrupt, so node consolidation no longer takes both replicas down at once.

Observability

• Prometheus metrics: request rate, errors and latency by route pattern, cache hits and misses, cross-cloud lookups.
• OpenTelemetry, injected by the cluster rather than bundled, sent through a collector to both AWS X-Ray and Grafana Cloud Tempo.
• Every request log line carries the trace id; every span carries the correlation id.
• A Grafana Cloud dashboard and alert, templated in observability/.

Deployment

• deploy/ manifests as templates; filled-in copies stay out of the repository.