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Prometheus v2.25.0 Release Notes

Release Date: 2021-02-17 // about 3 years ago

  • 🚀 This release includes a new --enable-feature= flag that enables 🚚 experimental features. Such features might be changed or removed in the future.

    🚀 In the next minor release (2.26), Prometheus will use the Alertmanager API v2. It will be done by defaulting alertmanager_config.api_version to v2. 🚀 Alertmanager API v2 was released in Alertmanager v0.16.0 (released in January 2019).

    • [FEATURE] experimental API: Accept remote_write requests. Behind the --enable-feature=remote-write-receiver flag. #8424
    • [FEATURE] experimental PromQL: Add '@ ' modifier. Behind the --enable-feature=promql-at-modifier flag. #8121 #8436 #8425
    • ✅ [ENHANCEMENT] Add optional name property to testgroup for better test failure output. #8440
    • ⚠ [ENHANCEMENT] Add warnings into React Panel on the Graph page. #8427
    • [ENHANCEMENT] TSDB: Increase the number of buckets for the compaction duration metric. #8342
    • [ENHANCEMENT] Remote: Allow passing along custom remote_write HTTP headers. #8416
    • 🔧 [ENHANCEMENT] Mixins: Scope grafana configuration. #8332
    • 📇 [ENHANCEMENT] Kubernetes SD: Add endpoint labels metadata. #8273
    • 💻 [ENHANCEMENT] UI: Expose total number of label pairs in head in TSDB stats page. #8343
    • [ENHANCEMENT] TSDB: Reload blocks every minute, to detect new blocks and enforce retention more often. #8343
    • 🛠 [BUGFIX] API: Fix global URL when external address has no port. #8359
    • 🛠 [BUGFIX] Backfill: Fix error message handling. #8432
    • 🛠 [BUGFIX] Backfill: Fix "add sample: out of bounds" error when series span an entire block. #8476
    • 🛠 [BUGFIX] Deprecate unused flag --alertmanager.timeout. #8407
    • 🛠 [BUGFIX] Mixins: Support remote-write metrics renamed in v2.23 in alerts. #8423
    • 🛠 [BUGFIX] Remote: Fix garbage collection of dropped series in remote write. #8387
    • 🛠 [BUGFIX] Remote: Log recoverable remote write errors as warnings. #8412
    • 🛠 [BUGFIX] TSDB: Remove pre-2.21 temporary blocks on start. #8353.
    • 🛠 [BUGFIX] UI: Fix duplicated keys on /targets page. #8456
    • 🛠 [BUGFIX] UI: Fix label name leak into class name. #8459