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CHANGELOG.md

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0.9.2 / 2018-12-06

  • [FEATURE] Support for Go modules. #501
  • [FEATURE] Timer.ObserveDuration returns observed duration. #509
  • [ENHANCEMENT] Improved doc comments and error messages. #504
  • [BUGFIX] Fix race condition during metrics gathering. #512
  • [BUGFIX] Fix testutil metric comparison for Histograms and empty labels. #494 #498

0.9.1 / 2018-11-03

  • [FEATURE] Add WriteToTextfile function to facilitate the creation of *.prom files for the textfile collector of the node exporter. #489
  • [ENHANCEMENT] More descriptive error messages for inconsistent label cardinality. #487
  • [ENHANCEMENT] Exposition: Use a GZIP encoder pool to avoid allocations in high-frequency scrape scenarios. #366
  • [ENHANCEMENT] Exposition: Streaming serving of metrics data while encoding. #482
  • [ENHANCEMENT] API client: Add a way to return the body of a 5xx response. #479

0.9.0 / 2018-10-15

  • [CHANGE] Go1.6 is no longer supported.
  • [CHANGE] More refinements of the Registry consistency checks: Duplicated labels are now detected, but inconsistent label dimensions are now allowed. Collisions with the “magic” metric and label names in Summaries and Histograms are detected now. #108 #417 #471
  • [CHANGE] Changed ProcessCollector constructor. #219
  • [CHANGE] Changed Go counter go_memstats_heap_released_bytes_total to gauge go_memstats_heap_released_bytes. #229
  • [CHANGE] Unexported LabelPairSorter. #453
  • [CHANGE] Removed the Untyped metric from direct instrumentation. #340
  • [CHANGE] Unexported MetricVec. #319
  • [CHANGE] Removed deprecated Set method from Counter #247
  • [CHANGE] Removed deprecated RegisterOrGet and MustRegisterOrGet. #247
  • [CHANGE] API client: Introduced versioned packages.
  • [FEATURE] A Registerer can be wrapped with prefixes and labels. #357
  • [FEATURE] “Describe by collect” helper function. #239
  • [FEATURE] Added package testutil. #58
  • [FEATURE] Timestamp can be explicitly set for const metrics. #187
  • [FEATURE] “Unchecked” collectors are possible now without cheating. #47
  • [FEATURE] Pushing to the Pushgateway reworked in package push to support many new features. (The old functions are still usable but deprecated.) #372 #341
  • [FEATURE] Configurable connection limit for scrapes. #179
  • [FEATURE] New HTTP middlewares to instrument http.Handler and http.RoundTripper. The old middlewares and the pre-instrumented /metrics handler are (strongly) deprecated. #316 #57 #101 #224
  • [FEATURE] “Currying” for metric vectors. #320
  • [FEATURE] A Summary can be created without quantiles. #118
  • [FEATURE] Added a Timer helper type. #231
  • [FEATURE] Added a Graphite bridge. #197
  • [FEATURE] Help strings are now optional. #460
  • [FEATURE] Added process_virtual_memory_max_bytes metric. #438 #440
  • [FEATURE] Added go_gc_cpu_fraction and go_threads metrics. #281 #277
  • [FEATURE] Added promauto package with auto-registering metrics. #385 #393
  • [FEATURE] Add SetToCurrentTime method to Gauge. #259
  • [FEATURE] API client: Add AlertManager, Status, and Target methods. #402
  • [FEATURE] API client: Add admin methods. #398
  • [FEATURE] API client: Support series API. #361
  • [FEATURE] API client: Support querying label values.
  • [ENHANCEMENT] Smarter creation of goroutines during scraping. Solves memory usage spikes in certain situations. #369
  • [ENHANCEMENT] Counters are now faster if dealing with integers only. #367
  • [ENHANCEMENT] Improved label validation. #274 #335
  • [BUGFIX] Creating a const metric with an invalid Desc returns an error. #460
  • [BUGFIX] Histogram observations don't race any longer with exposition. #275
  • [BUGFIX] Fixed goroutine leaks. #236 #472
  • [BUGFIX] Fixed an error message for exponential histogram buckets. #467
  • [BUGFIX] Fixed data race writing to the metric map. #401
  • [BUGFIX] API client: Decode JSON on a 4xx respons but do not on 204 responses. #476 #414

0.8.0 / 2016-08-17

  • [CHANGE] Registry is doing more consistency checks. This might break existing setups that used to export inconsistent metrics.
  • [CHANGE] Pushing to Pushgateway moved to package push and changed to allow arbitrary grouping.
  • [CHANGE] Removed SelfCollector.
  • [CHANGE] Removed PanicOnCollectError and EnableCollectChecks methods.
  • [CHANGE] Moved packages to the prometheus/common repo: text, model, extraction.
  • [CHANGE] Deprecated a number of functions.
  • [FEATURE] Allow custom registries. Added Registerer and Gatherer interfaces.
  • [FEATURE] Separated HTTP exposition, allowing custom HTTP handlers (package promhttp) and enabling the creation of other exposition mechanisms.
  • [FEATURE] MustRegister is variadic now, allowing registration of many collectors in one call.
  • [FEATURE] Added HTTP API v1 package.
  • [ENHANCEMENT] Numerous documentation improvements.
  • [ENHANCEMENT] Improved metric sorting.
  • [ENHANCEMENT] Inlined fnv64a hashing for improved performance.
  • [ENHANCEMENT] Several test improvements.
  • [BUGFIX] Handle collisions in MetricVec.

0.7.0 / 2015-07-27

  • [CHANGE] Rename ExporterLabelPrefix to ExportedLabelPrefix.
  • [BUGFIX] Closed gaps in metric consistency check.
  • [BUGFIX] Validate LabelName/LabelSet on JSON unmarshaling.
  • [ENHANCEMENT] Document the possibility to create "empty" metrics in a metric vector.
  • [ENHANCEMENT] Fix and clarify various doc comments and the README.md.
  • [ENHANCEMENT] (Kind of) solve "The Proxy Problem" of http.InstrumentHandler.
  • [ENHANCEMENT] Change responseWriterDelegator.written to int64.

0.6.0 / 2015-06-01

  • [CHANGE] Rename process_goroutines to go_goroutines.
  • [ENHANCEMENT] Validate label names during YAML decoding.
  • [ENHANCEMENT] Add LabelName regular expression.
  • [BUGFIX] Ensure alignment of struct members for 32-bit systems.

0.5.0 / 2015-05-06

  • [BUGFIX] Removed a weakness in the fingerprinting aka signature code. This makes fingerprinting slower and more allocation-heavy, but the weakness was too severe to be tolerated.
  • [CHANGE] As a result of the above, Metric.Fingerprint is now returning a different fingerprint. To keep the same fingerprint, the new method Metric.FastFingerprint was introduced, which will be used by the Prometheus server for storage purposes (implying that a collision detection has to be added, too).
  • [ENHANCEMENT] The Metric.Equal and Metric.Before do not depend on fingerprinting anymore, removing the possibility of an undetected fingerprint collision.
  • [FEATURE] The Go collector in the exposition library includes garbage collection stats.
  • [FEATURE] The exposition library allows to create constant "throw-away" summaries and histograms.
  • [CHANGE] A number of new reserved labels and prefixes.

0.4.0 / 2015-04-08

  • [CHANGE] Return NaN when Summaries have no observations yet.
  • [BUGFIX] Properly handle Summary decay upon Write().
  • [BUGFIX] Fix the documentation link to the consumption library.
  • [FEATURE] Allow the metric family injection hook to merge with existing metric families.
  • [ENHANCEMENT] Removed cgo dependency and conditional compilation of procfs.
  • [MAINTENANCE] Adjusted to changes in matttproud/golang_protobuf_extensions.

0.3.2 / 2015-03-11

  • [BUGFIX] Fixed the receiver type of COWMetric.Set(). This method is only used by the Prometheus server internally.
  • [CLEANUP] Added licenses of vendored code left out by godep.

0.3.1 / 2015-03-04

  • [ENHANCEMENT] Switched fingerprinting functions from own free list to sync.Pool.
  • [CHANGE] Makefile uses Go 1.4.2 now (only relevant for examples and tests).

0.3.0 / 2015-03-03

  • [CHANGE] Changed the fingerprinting for metrics. THIS WILL INVALIDATE ALL PERSISTED FINGERPRINTS. IF YOU COMPILE THE PROMETHEUS SERVER WITH THIS VERSION, YOU HAVE TO WIPE THE PREVIOUSLY CREATED STORAGE.
  • [CHANGE] LabelValuesToSignature removed. (Nobody had used it, and it was arguably broken.)
  • [CHANGE] Vendored dependencies. Those are only used by the Makefile. If client_golang is used as a library, the vendoring will stay out of your way.
  • [BUGFIX] Remove a weakness in the fingerprinting for metrics. (This made the fingerprinting change above necessary.)
  • [FEATURE] Added new fingerprinting functions SignatureForLabels and SignatureWithoutLabels to be used by the Prometheus server. These functions require fewer allocations than the ones currently used by the server.

0.2.0 / 2015-02-23

  • [FEATURE] Introduce new Histagram metric type.
  • [CHANGE] Ignore process collector errors for now (better error handling pending).
  • [CHANGE] Use clear error interface for process pidFn.
  • [BUGFIX] Fix Go download links for several archs and OSes.
  • [ENHANCEMENT] Massively improve Gauge and Counter performance.
  • [ENHANCEMENT] Catch illegal label names for summaries in histograms.
  • [ENHANCEMENT] Reduce allocations during fingerprinting.
  • [ENHANCEMENT] Remove cgo dependency. procfs package will only be included if both cgo is available and the build is for an OS with procfs.
  • [CLEANUP] Clean up code style issues.
  • [CLEANUP] Mark slow test as such and exclude them from travis.
  • [CLEANUP] Update protobuf library package name.
  • [CLEANUP] Updated vendoring of beorn7/perks.

0.1.0 / 2015-02-02

  • [CLEANUP] Introduced semantic versioning and changelog. From now on, changes will be reported in this file.