Releases

AI-analyzed release notes for CNCF graduated and incubating projects.

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All Action needed Check if affected Plan ahead

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All AI & ML CI/CD & App Delivery Kubernetes Core Networking & Messaging Observability Orchestration & Management Provisioning & Runtime Security Storage & Data

Apr 2026Clear ×

OpenTelemetryv0.151.0ObservabilityApr 28, 2026

CHECK 2PLAN 1OTHER 23View full analysis

A release with API and configuration contract changes, new capabilities, deprecations, and bug fixes. It includes transport, telemetry, generated configuration, and data-handling updates, with no disclosed security advisories or security-specific fixes.

Check if affected (2)

breakingRelative replace paths in generated Collector source
Applies if you use the generated Collector source.
breakingNamed Config.Protocols field
Applies if you use Config.Protocols.

Plan ahead (1)

deprecatedDefaultMetricsBuilderConfig deprecation
Applies if you use DefaultMetricsBuilderConfig.

Source ↗

OpenCostv1.120.1ObservabilityApr 28, 2026

CHECK 1OTHER 4View full analysis

A maintenance release with a dependency update, correctness fixes, and new operator-facing capabilities. The MCP server now requires explicit opt-in when MCP_SERVER_ENABLED is not configured.

Check if affected (1)

breakingThe MCP_SERVER_ENABLED default, changed to false
Applies if MCP_SERVER_ENABLED is not configured.

Source ↗

Cortexv1.21.0ObservabilityApr 27, 2026

ACTION 1CHECK 1PLAN 3OTHER 81View full analysis

A feature and maintenance release that adds Store Gateway, federation, overrides, caching, metric, and query capabilities while graduating several experimental features. It also changes defaults and configuration names, updates dependencies, and fixes correctness, memory, panic, and data-corruption defects.

Action needed (1)

breakingThe blocks storage bucket index default
Blocks storage now enables the bucket index by default through -blocks-storage.bucket-store.bucket-index.enabled. Disabling it with -blocks-storage.bucket-store.bucket-index.enabled=false is not recommended for production.

Check if affected (1)

breakingThe Distributor type and unit label flag
Applies if you configure either -distributor.enable-type-and-unit-labels or -distributor.otlp.enable-type-and-unit-labels for remote write v2 and OTLP requests.

Plan ahead (3)

breakingThe Ruler API flag rename
Applies if you configure -experimental.ruler.enable-api.
breakingThe Alertmanager API flag rename
Applies if you configure -experimental.alertmanager.enable-api.
breakingThe Users Scanner user index update configuration
Applies if you configure either -*.users-scanner.user-index.cleanup-interval or clean_up_interval.

Source ↗

OpenCostv1.120.0ObservabilityApr 13, 2026

ACTION 1OTHER 26View full analysis

A maintenance release with dependency updates, defect corrections, expanded compatibility, and new integrations and configuration capabilities. An existing configuration source is replaced, so affected operators need to update their configuration.

Action needed (1)

breakingProvider configuration replaced by cloud-integration.json
The provider config is no longer used, and configuration is read from cloud-integration.json instead. Operators using the replaced configuration source need to update their configuration.

Source ↗

Prometheusv3.11.0ObservabilityApr 2, 2026

CHECK 1PLAN 2OTHER 42View full analysis

A broad release with new service discovery, PromQL, TSDB, and UI capabilities, alongside performance, dependency, output, and correctness changes. It also deprecates legacy Hetzner discovery labels and corrects TSDB retention-time handling.

Check if affected (1)

breakingThe storage.tsdb.retention.time unit handling
Applies if you configure storage.tsdb.retention.time.

Plan ahead (2)

deprecatedThe __meta_hetzner_datacenter label, deprecatedremoval date not announced
Applies if you use __meta_hetzner_datacenter.
deprecatedThe Hetzner Cloud datacenter location labels, deprecated
Applies if you use __meta_hetzner_hcloud_datacenter_location or __meta_hetzner_hcloud_datacenter_location_network_zone.

Source ↗

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