cc-metric-store/ReleaseNotes.md

cc-metric-store version 1.5.0

This is a major release of cc-metric-store, the metric timeseries cache implementation of ClusterCockpit. Since the storage engine is now part of cc-backend we will follow the version number of cc-backend. For release specific notes visit the ClusterCockpit Documentation.

Breaking changes

• The internal memorystore, avro, resampler, and util packages have been removed. The storage engine is now provided by the cc-backend package (cc-backend/pkg/metricstore). This repository is now the HTTP API wrapper only.
• The configuration schema has changed. Refer to configs/config.json for the updated structure.

Notable changes

• Storage engine extracted to cc-backend library: The entire in-memory time-series storage engine was moved to cc-backend/pkg/metricstore. This reduces duplication in the ClusterCockpit suite and enables shared maintenance of the storage layer.
• HealthCheck API endpoint: New GET /api/healthcheck/ endpoint reports the health status of cluster nodes.
• Dynamic memory management: Memory limits can now be adjusted at runtime via a callback from the cc-backend library.
• Configuration schema validation: The config and metric config JSON schemas have been updated and are now validated against the structs they describe.
• Startup refactored: Application startup has been split into cli.go and server.go for clearer separation of concerns.
• go fix applied: Codebase updated to current Go idioms.
• Dependency upgrades: nats.go bumped from 1.36.0 to 1.47.0; cc-lib updated to v2.8.0; cc-backend updated to v1.5.0; various other module upgrades.