Releases

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

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

Project: PrometheusClear ×

Prometheusv3.14.0ObservabilityAug 18, 2026

ACTION 1CHECK 1PLAN 1OTHER 39View full analysis

A maintenance release with an API deprecation, operator-visible removals and default changes, new capabilities, performance improvements, and correctness fixes across discovery, PromQL, TSDB, and other components. No security advisories or explicitly described security vulnerabilities are included.

Action needed (1)

breakingDefault support for PromQL duration expressions
Duration expressions are enabled by default in PromQL. The promql-duration-expr feature flag is now a no-op.

Check if affected (1)

breakingThe __meta_hetzner_datacenter label, removed
Applies if you use hcloud targets.
The __meta_hetzner_datacenter label is removed from hcloud targets because it was removed from the Hetzner Cloud API.

Plan ahead (1)

deprecatedThe stats query parameter, deprecated for other valuesremoval date not announced
Applies if you set stats to a value other than true or all.
The stats query parameter is deprecated for values other than true and all on /api/v1/query and /api/v1/query_range. Other values still enable basic statistics but return a deprecation warning and will be rejected in the next major release.

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.
TSDB fixes the unit mismatch in storage.tsdb.retention.time that could make retention 1e6 times longer than configured.

Plan ahead (2)

deprecatedThe __meta_hetzner_datacenter label, deprecatedremoval date not announced
Applies if you use __meta_hetzner_datacenter.
The __meta_hetzner_datacenter label is deprecated for the robot role but remains available for backward compatibility. For the hcloud role, it will stop working after 1 July 2026; __meta_hetzner_robot_datacenter is the replacement for robot.
deprecatedThe Hetzner Cloud datacenter location labels, deprecated
Applies if you use __meta_hetzner_hcloud_datacenter_location or __meta_hetzner_hcloud_datacenter_location_network_zone.
The __meta_hetzner_hcloud_datacenter_location and __meta_hetzner_hcloud_datacenter_location_network_zone labels are deprecated. They are replaced by __meta_hetzner_hcloud_location and __meta_hetzner_hcloud_location_network_zone.

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