1## Unreleased
2
3## 1.19.0 / 2023-02-27
4
5The module `prometheus/common v0.48.0` introduced an incompatibility when used together with client_golang (See https://github.com/prometheus/client_golang/pull/1448 for more details). If your project uses client_golang and you want to use `prometheus/common v0.48.0` or higher, please update client_golang to v1.19.0.
6
7* [CHANGE] Minimum required go version is now 1.20 (we also test client_golang against new 1.22 version). #1445 #1449
8* [FEATURE] collectors: Add version collector. #1422 #1427
9
10## 1.18.0 / 2023-12-22
11
12* [FEATURE] promlint: Allow creation of custom metric validations. #1311
13* [FEATURE] Go programs using client_golang can be built in wasip1 OS. #1350
14* [BUGFIX] histograms: Add timer to reset ASAP after bucket limiting has happened. #1367
15* [BUGFIX] testutil: Fix comparison of metrics with empty Help strings. #1378
16* [ENHANCEMENT] Improved performance of `MetricVec.WithLabelValues(...)`. #1360
17
18## 1.17.0 / 2023-09-27
19
20* [CHANGE] Minimum required go version is now 1.19 (we also test client_golang against new 1.21 version). #1325
21* [FEATURE] Add support for Created Timestamps in Counters, Summaries and Historams. #1313
22* [ENHANCEMENT] Enable detection of a native histogram without observations. #1314
23
24## 1.16.0 / 2023-06-15
25
26* [BUGFIX] api: Switch to POST for LabelNames, Series, and QueryExemplars. #1252
27* [BUGFIX] api: Fix undefined execution order in return statements. #1260
28* [BUGFIX] native histograms: Fix bug in bucket key calculation. #1279
29* [ENHANCEMENT] Reduce constrainLabels allocations for all metrics. #1272
30* [ENHANCEMENT] promhttp: Add process start time header for scrape efficiency. #1278
31* [ENHANCEMENT] promlint: Improve metricUnits runtime. #1286
32
33## 1.15.1 / 2023-05-3
34
35* [BUGFIX] Fixed promhttp.Instrument* handlers wrongly trying to attach exemplar to unsupported metrics (e.g. summary), \
36causing panics. #1253
37
38## 1.15.0 / 2023-04-13
39
40* [BUGFIX] Fix issue with atomic variables on ppc64le. #1171
41* [BUGFIX] Support for multiple samples within same metric. #1181
42* [BUGFIX] Bump golang.org/x/text to v0.3.8 to mitigate CVE-2022-32149. #1187
43* [ENHANCEMENT] Add exemplars and middleware examples. #1173
44* [ENHANCEMENT] Add more context to "duplicate label names" error to enable debugging. #1177
45* [ENHANCEMENT] Add constrained labels and constrained variant for all MetricVecs. #1151
46* [ENHANCEMENT] Moved away from deprecated github.com/golang/protobuf package. #1183
47* [ENHANCEMENT] Add possibility to dynamically get label values for http instrumentation. #1066
48* [ENHANCEMENT] Add ability to Pusher to add custom headers. #1218
49* [ENHANCEMENT] api: Extend and improve efficiency of json-iterator usage. #1225
50* [ENHANCEMENT] Added (official) support for go 1.20. #1234
51* [ENHANCEMENT] timer: Added support for exemplars. #1233
52* [ENHANCEMENT] Filter expected metrics as well in CollectAndCompare. #1143
53* [ENHANCEMENT] :warning: Only set start/end if time is not Zero. This breaks compatibility in experimental api package. If you strictly depend on empty time.Time as actual value, the behavior is now changed. #1238
54
55## 1.14.0 / 2022-11-08
56
57* [FEATURE] Add Support for Native Histograms. #1150
58* [CHANGE] Extend `prometheus.Registry` to implement `prometheus.Collector` interface. #1103
59
60## 1.13.1 / 2022-11-01
61
62* [BUGFIX] Fix race condition with Exemplar in Counter. #1146
63* [BUGFIX] Fix `CumulativeCount` value of `+Inf` bucket created from exemplar. #1148
64* [BUGFIX] Fix double-counting bug in `promhttp.InstrumentRoundTripperCounter`. #1118
65
66## 1.13.0 / 2022-08-05
67
68* [CHANGE] Minimum required Go version is now 1.17 (we also test client_golang against new 1.19 version).
69* [ENHANCEMENT] Added `prometheus.TransactionalGatherer` interface for `promhttp.Handler` use which allows using low allocation update techniques for custom collectors. #989
70* [ENHANCEMENT] Added exemplar support to `prometheus.NewConstHistogram`. See [`ExampleNewConstHistogram_WithExemplar`](prometheus/examples_test.go#L602) example on how to use it. #986
71* [ENHANCEMENT] `prometheus/push.Pusher` has now context aware methods that pass context to HTTP request. #1028
72* [ENHANCEMENT] `prometheus/push.Pusher` has now `Error` method that retrieve last error. #1075
73* [ENHANCEMENT] `testutil.GatherAndCompare` provides now readable diff on failed comparisons. #998
74* [ENHANCEMENT] Query API now supports timeouts. #1014
75* [ENHANCEMENT] New `MetricVec` method `DeletePartialMatch(labels Labels)` for deleting all metrics that match provided labels. #1013
76* [ENHANCEMENT] `api.Config` now accepts passing custom `*http.Client`. #1025
77* [BUGFIX] Raise exemplar labels limit from 64 to 128 bytes as specified in OpenMetrics spec. #1091
78* [BUGFIX] Allow adding exemplar to +Inf bucket to const histograms. #1094
79* [ENHANCEMENT] Most `promhttp.Instrument*` middlewares now supports adding exemplars to metrics. This allows hooking those to your tracing middleware that retrieves trace ID and put it in exemplar if present. #1055
80* [ENHANCEMENT] Added `testutil.ScrapeAndCompare` method. #1043
81* [BUGFIX] Fixed `GopherJS` build support. #897
82* [ENHANCEMENT] :warning: Added way to specify what `runtime/metrics` `collectors.NewGoCollector` should use. See [`ExampleGoCollector_WithAdvancedGoMetrics`](prometheus/collectors/go_collector_latest_test.go#L263). #1102
83
84## 1.12.2 / 2022-05-13
85
86* [CHANGE] Added `collectors.WithGoCollections` that allows to choose what collection of Go runtime metrics user wants: Equivalent of [`MemStats` structure](https://pkg.go.dev/runtime#MemStats) configured using `GoRuntimeMemStatsCollection`, new based on dedicated [runtime/metrics](https://pkg.go.dev/runtime/metrics) metrics represented by `GoRuntimeMetricsCollection` option, or both by specifying `GoRuntimeMemStatsCollection | GoRuntimeMetricsCollection` flag. #1031
87* [CHANGE] :warning: Change in `collectors.NewGoCollector` metrics: Reverting addition of new ~80 runtime metrics by default. You can enable this back with `GoRuntimeMetricsCollection` option or `GoRuntimeMemStatsCollection | GoRuntimeMetricsCollection` for smooth transition.
88* [BUGFIX] Fixed the bug that causes generated histogram metric names to end with `_total`. ⚠️ This changes 3 metric names in the new Go collector that was reverted from default in this release.
89 * `go_gc_heap_allocs_by_size_bytes_total` -> `go_gc_heap_allocs_by_size_bytes`,
90 * `go_gc_heap_frees_by_size_bytes_total` -> `go_gc_heap_allocs_by_size_bytes`
91 * `go_gc_pauses_seconds_total` -> `go_gc_pauses_seconds`.
92* [CHANCE] Removed `-Inf` buckets from new Go Collector histograms.
93
94## 1.12.1 / 2022-01-29
95
96* [BUGFIX] Make the Go 1.17 collector concurrency-safe #969
97 * Use simpler locking in the Go 1.17 collector #975
98* [BUGFIX] Reduce granularity of histogram buckets for Go 1.17 collector #974
99* [ENHANCEMENT] API client: make HTTP reads more efficient #976
100
101## 1.12.0 / 2022-01-19
102
103* [CHANGE] example/random: Move flags and metrics into main() #935
104* [FEATURE] API client: Support wal replay status api #944
105* [FEATURE] Use the runtime/metrics package for the Go collector for 1.17+ #955
106* [ENHANCEMENT] API client: Update /api/v1/status/tsdb to include headStats #925
107* [ENHANCEMENT] promhttp: Check validity of method and code label values #962
108
109## 1.11.0 / 2021-06-07
110
111* [CHANGE] Add new collectors package. #862
112* [CHANGE] `prometheus.NewExpvarCollector` is deprecated, use `collectors.NewExpvarCollector` instead. #862
113* [CHANGE] `prometheus.NewGoCollector` is deprecated, use `collectors.NewGoCollector` instead. #862
114* [CHANGE] `prometheus.NewBuildInfoCollector` is deprecated, use `collectors.NewBuildInfoCollector` instead. #862
115* [FEATURE] Add new collector for database/sql#DBStats. #866
116* [FEATURE] API client: Add exemplars API support. #861
117* [ENHANCEMENT] API client: Add newer fields to Rules API. #855
118* [ENHANCEMENT] API client: Add missing fields to Targets API. #856
119
120## 1.10.0 / 2021-03-18
121
122* [CHANGE] Minimum required Go version is now 1.13.
123* [CHANGE] API client: Add matchers to `LabelNames` and `LabesValues`. #828
124* [FEATURE] API client: Add buildinfo call. #841
125* [BUGFIX] Fix build on riscv64. #833
126
127## 1.9.0 / 2020-12-17
128
129* [FEATURE] `NewPidFileFn` helper to create process collectors for processes whose PID is read from a file. #804
130* [BUGFIX] promhttp: Prevent endless loop in `InstrumentHandler...` middlewares with invalid metric or label names. #823
131
132## 1.8.0 / 2020-10-15
133
134* [CHANGE] API client: Use `time.Time` rather than `string` for timestamps in `RuntimeinfoResult`. #777
135* [FEATURE] Export `MetricVec` to facilitate implementation of vectors of custom `Metric` types. #803
136* [FEATURE] API client: Support `/status/tsdb` endpoint. #773
137* [ENHANCEMENT] API client: Enable GET fallback on status code 501. #802
138* [ENHANCEMENT] Remove `Metric` references after reslicing to free up more memory. #784
139
140## 1.7.1 / 2020-06-23
141
142* [BUGFIX] API client: Actually propagate start/end parameters of `LabelNames` and `LabelValues`. #771
143
144## 1.7.0 / 2020-06-17
145
146* [CHANGE] API client: Add start/end parameters to `LabelNames` and `LabelValues`. #767
147* [FEATURE] testutil: Add `GatherAndCount` and enable filtering in `CollectAndCount` #753
148* [FEATURE] API client: Add support for `status` and `runtimeinfo` endpoints. #755
149* [ENHANCEMENT] Wrapping `nil` with a `WrapRegistererWith...` function creates a no-op `Registerer`. #764
150* [ENHANCEMENT] promlint: Allow Kelvin as a base unit for cases like color temperature. #761
151* [BUGFIX] push: Properly handle empty job and label values. #752
152
153## 1.6.0 / 2020-04-28
154
155* [FEATURE] testutil: Add lint checks for metrics, including a sub-package `promlint` to expose the linter engine for external usage. #739 #743
156* [ENHANCEMENT] API client: Improve error messages. #731
157* [BUGFIX] process collector: Fix `process_resident_memory_bytes` on 32bit MS Windows. #734
158
159## 1.5.1 / 2020-03-14
160
161* [BUGFIX] promhttp: Remove another superfluous `WriteHeader` call. #726
162
163## 1.5.0 / 2020-03-03
164
165* [FEATURE] promauto: Add a factory to allow automatic registration with a local registry. #713
166* [FEATURE] promauto: Add `NewUntypedFunc`. #713
167* [FEATURE] API client: Support new metadata endpoint. #718
168
169## 1.4.1 / 2020-02-07
170
171* [BUGFIX] Fix timestamp of exemplars in `CounterVec`. #710
172
173## 1.4.0 / 2020-01-27
174
175* [CHANGE] Go collector: Improve doc string for `go_gc_duration_seconds`. #702
176* [FEATURE] Support a subset of OpenMetrics, including exemplars. Needs opt-in via `promhttp.HandlerOpts`. **EXPERIMENTAL** #706
177* [FEATURE] Add `testutil.CollectAndCount`. #703
178
179## 1.3.0 / 2019-12-21
180
181* [FEATURE] Support tags in Graphite bridge. #668
182* [BUGFIX] API client: Actually return Prometheus warnings. #699
183
184## 1.2.1 / 2019-10-17
185
186* [BUGFIX] Fix regression in the implementation of `Registerer.Unregister`. #663
187
188## 1.2.0 / 2019-10-15
189
190* [FEATURE] Support pushing to Pushgateway v0.10+. #652
191* [ENHANCEMENT] Improve hashing to make a spurious `AlreadyRegisteredError` less likely to occur. #657
192* [ENHANCEMENT] API client: Add godoc examples. #630
193* [BUGFIX] promhttp: Correctly call WriteHeader in HTTP middleware. #634
194
195## 1.1.0 / 2019-08-01
196
197* [CHANGE] API client: Format time as UTC rather than RFC3339Nano. #617
198* [CHANGE] API client: Add warnings to `LabelValues` and `LabelNames` calls. #609
199* [FEATURE] Push: Support base64 encoding in grouping key. #624
200* [FEATURE] Push: Add Delete method to Pusher. #613
201
202## 1.0.0 / 2019-06-15
203
204_This release removes all previously deprecated features, resulting in the breaking changes listed below. As this is v1.0.0, semantic versioning applies from now on, with the exception of the API client and parts marked explicitly as experimental._
205
206* [CHANGE] Remove objectives from the default `Summary`. (Objectives have to be set explicitly in the `SummaryOpts`.) #600
207* [CHANGE] Remove all HTTP related feature in the `prometheus` package. (Use the `promhttp` package instead.) #600
208* [CHANGE] Remove `push.FromGatherer`, `push.AddFromGatherer`, `push.Collectors`. (Use `push.New` instead.) #600
209* [CHANGE] API client: Pass warnings through on non-error responses. #599
210* [CHANGE] API client: Add warnings to `Series` call. #603
211* [FEATURE] Make process collector work on Microsoft Windows. **EXPERIMENTAL** #596
212* [FEATURE] API client: Add `/labels` call. #604
213* [BUGFIX] Make `AlreadyRegisteredError` usable for wrapped registries. #607
214
215## 0.9.4 / 2019-06-07
216
217* [CHANGE] API client: Switch to alert values as strings. #585
218* [FEATURE] Add a collector for Go module build information. #595
219* [FEATURE] promhttp: Add an counter for internal errors during HTTP exposition. #594
220* [FEATURE] API client: Support target metadata API. #590
221* [FEATURE] API client: Support storage warnings. #562
222* [ENHANCEMENT] API client: Improve performance handling JSON. #570
223* [BUGFIX] Reduce test flakiness. #573
224
225## 0.9.3 / 2019-05-16
226
227* [CHANGE] Required Go version is now 1.9+. #561
228* [FEATURE] API client: Add POST with get fallback for Query/QueryRange. #557
229* [FEATURE] API client: Add alerts endpoint. #552
230* [FEATURE] API client: Add rules endpoint. #508
231* [FEATURE] push: Add option to pick metrics format. #540
232* [ENHANCEMENT] Limit time the Go collector may take to collect memstats,
233 returning results from the previous collection in case of a timeout. #568
234* [ENHANCEMENT] Pusher now requires only a thin interface instead of a full
235 `http.Client`, facilitating mocking and custom HTTP client implementation.
236 #559
237* [ENHANCEMENT] Memory usage improvement for histograms and summaries without
238 objectives. #536
239* [ENHANCEMENT] Summaries without objectives are now lock-free. #521
240* [BUGFIX] promhttp: `InstrumentRoundTripperTrace` now takes into account a pre-set context. #582
241* [BUGFIX] `TestCounterAddLarge` now works on all platforms. #567
242* [BUGFIX] Fix `promhttp` examples. #535 #544
243* [BUGFIX] API client: Wait for done before writing to shared response
244 body. #532
245* [BUGFIX] API client: Deal with discovered labels properly. #529
246
247## 0.9.2 / 2018-12-06
248
249* [FEATURE] Support for Go modules. #501
250* [FEATURE] `Timer.ObserveDuration` returns observed duration. #509
251* [ENHANCEMENT] Improved doc comments and error messages. #504
252* [BUGFIX] Fix race condition during metrics gathering. #512
253* [BUGFIX] Fix testutil metric comparison for Histograms and empty labels. #494
254 #498
255
256## 0.9.1 / 2018-11-03
257
258* [FEATURE] Add `WriteToTextfile` function to facilitate the creation of
259 *.prom files for the textfile collector of the node exporter. #489
260* [ENHANCEMENT] More descriptive error messages for inconsistent label
261 cardinality. #487
262* [ENHANCEMENT] Exposition: Use a GZIP encoder pool to avoid allocations in
263 high-frequency scrape scenarios. #366
264* [ENHANCEMENT] Exposition: Streaming serving of metrics data while encoding.
265 #482
266* [ENHANCEMENT] API client: Add a way to return the body of a 5xx response.
267 #479
268
269## 0.9.0 / 2018-10-15
270
271* [CHANGE] Go1.6 is no longer supported.
272* [CHANGE] More refinements of the `Registry` consistency checks: Duplicated
273 labels are now detected, but inconsistent label dimensions are now allowed.
274 Collisions with the “magic” metric and label names in Summaries and
275 Histograms are detected now. #108 #417 #471
276* [CHANGE] Changed `ProcessCollector` constructor. #219
277* [CHANGE] Changed Go counter `go_memstats_heap_released_bytes_total` to gauge
278 `go_memstats_heap_released_bytes`. #229
279* [CHANGE] Unexported `LabelPairSorter`. #453
280* [CHANGE] Removed the `Untyped` metric from direct instrumentation. #340
281* [CHANGE] Unexported `MetricVec`. #319
282* [CHANGE] Removed deprecated `Set` method from `Counter` #247
283* [CHANGE] Removed deprecated `RegisterOrGet` and `MustRegisterOrGet`. #247
284* [CHANGE] API client: Introduced versioned packages.
285* [FEATURE] A `Registerer` can be wrapped with prefixes and labels. #357
286* [FEATURE] “Describe by collect” helper function. #239
287* [FEATURE] Added package `testutil`. #58
288* [FEATURE] Timestamp can be explicitly set for const metrics. #187
289* [FEATURE] “Unchecked” collectors are possible now without cheating. #47
290* [FEATURE] Pushing to the Pushgateway reworked in package `push` to support
291 many new features. (The old functions are still usable but deprecated.) #372
292 #341
293* [FEATURE] Configurable connection limit for scrapes. #179
294* [FEATURE] New HTTP middlewares to instrument `http.Handler` and
295 `http.RoundTripper`. The old middlewares and the pre-instrumented `/metrics`
296 handler are (strongly) deprecated. #316 #57 #101 #224
297* [FEATURE] “Currying” for metric vectors. #320
298* [FEATURE] A `Summary` can be created without quantiles. #118
299* [FEATURE] Added a `Timer` helper type. #231
300* [FEATURE] Added a Graphite bridge. #197
301* [FEATURE] Help strings are now optional. #460
302* [FEATURE] Added `process_virtual_memory_max_bytes` metric. #438 #440
303* [FEATURE] Added `go_gc_cpu_fraction` and `go_threads` metrics. #281 #277
304* [FEATURE] Added `promauto` package with auto-registering metrics. #385 #393
305* [FEATURE] Add `SetToCurrentTime` method to `Gauge`. #259
306* [FEATURE] API client: Add AlertManager, Status, and Target methods. #402
307* [FEATURE] API client: Add admin methods. #398
308* [FEATURE] API client: Support series API. #361
309* [FEATURE] API client: Support querying label values.
310* [ENHANCEMENT] Smarter creation of goroutines during scraping. Solves memory
311 usage spikes in certain situations. #369
312* [ENHANCEMENT] Counters are now faster if dealing with integers only. #367
313* [ENHANCEMENT] Improved label validation. #274 #335
314* [BUGFIX] Creating a const metric with an invalid `Desc` returns an error. #460
315* [BUGFIX] Histogram observations don't race any longer with exposition. #275
316* [BUGFIX] Fixed goroutine leaks. #236 #472
317* [BUGFIX] Fixed an error message for exponential histogram buckets. #467
318* [BUGFIX] Fixed data race writing to the metric map. #401
319* [BUGFIX] API client: Decode JSON on a 4xx response but do not on 204
320 responses. #476 #414
321
322## 0.8.0 / 2016-08-17
323
324* [CHANGE] Registry is doing more consistency checks. This might break
325 existing setups that used to export inconsistent metrics.
326* [CHANGE] Pushing to Pushgateway moved to package `push` and changed to allow
327 arbitrary grouping.
328* [CHANGE] Removed `SelfCollector`.
329* [CHANGE] Removed `PanicOnCollectError` and `EnableCollectChecks` methods.
330* [CHANGE] Moved packages to the prometheus/common repo: `text`, `model`,
331 `extraction`.
332* [CHANGE] Deprecated a number of functions.
333* [FEATURE] Allow custom registries. Added `Registerer` and `Gatherer`
334 interfaces.
335* [FEATURE] Separated HTTP exposition, allowing custom HTTP handlers (package
336 `promhttp`) and enabling the creation of other exposition mechanisms.
337* [FEATURE] `MustRegister` is variadic now, allowing registration of many
338 collectors in one call.
339* [FEATURE] Added HTTP API v1 package.
340* [ENHANCEMENT] Numerous documentation improvements.
341* [ENHANCEMENT] Improved metric sorting.
342* [ENHANCEMENT] Inlined fnv64a hashing for improved performance.
343* [ENHANCEMENT] Several test improvements.
344* [BUGFIX] Handle collisions in MetricVec.
345
346## 0.7.0 / 2015-07-27
347
348* [CHANGE] Rename ExporterLabelPrefix to ExportedLabelPrefix.
349* [BUGFIX] Closed gaps in metric consistency check.
350* [BUGFIX] Validate LabelName/LabelSet on JSON unmarshaling.
351* [ENHANCEMENT] Document the possibility to create "empty" metrics in
352 a metric vector.
353* [ENHANCEMENT] Fix and clarify various doc comments and the README.md.
354* [ENHANCEMENT] (Kind of) solve "The Proxy Problem" of http.InstrumentHandler.
355* [ENHANCEMENT] Change responseWriterDelegator.written to int64.
356
357## 0.6.0 / 2015-06-01
358
359* [CHANGE] Rename process_goroutines to go_goroutines.
360* [ENHANCEMENT] Validate label names during YAML decoding.
361* [ENHANCEMENT] Add LabelName regular expression.
362* [BUGFIX] Ensure alignment of struct members for 32-bit systems.
363
364## 0.5.0 / 2015-05-06
365
366* [BUGFIX] Removed a weakness in the fingerprinting aka signature code.
367 This makes fingerprinting slower and more allocation-heavy, but the
368 weakness was too severe to be tolerated.
369* [CHANGE] As a result of the above, Metric.Fingerprint is now returning
370 a different fingerprint. To keep the same fingerprint, the new method
371 Metric.FastFingerprint was introduced, which will be used by the
372 Prometheus server for storage purposes (implying that a collision
373 detection has to be added, too).
374* [ENHANCEMENT] The Metric.Equal and Metric.Before do not depend on
375 fingerprinting anymore, removing the possibility of an undetected
376 fingerprint collision.
377* [FEATURE] The Go collector in the exposition library includes garbage
378 collection stats.
379* [FEATURE] The exposition library allows to create constant "throw-away"
380 summaries and histograms.
381* [CHANGE] A number of new reserved labels and prefixes.
382
383## 0.4.0 / 2015-04-08
384
385* [CHANGE] Return NaN when Summaries have no observations yet.
386* [BUGFIX] Properly handle Summary decay upon Write().
387* [BUGFIX] Fix the documentation link to the consumption library.
388* [FEATURE] Allow the metric family injection hook to merge with existing
389 metric families.
390* [ENHANCEMENT] Removed cgo dependency and conditional compilation of procfs.
391* [MAINTENANCE] Adjusted to changes in matttproud/golang_protobuf_extensions.
392
393## 0.3.2 / 2015-03-11
394
395* [BUGFIX] Fixed the receiver type of COWMetric.Set(). This method is
396 only used by the Prometheus server internally.
397* [CLEANUP] Added licenses of vendored code left out by godep.
398
399## 0.3.1 / 2015-03-04
400
401* [ENHANCEMENT] Switched fingerprinting functions from own free list to
402 sync.Pool.
403* [CHANGE] Makefile uses Go 1.4.2 now (only relevant for examples and tests).
404
405## 0.3.0 / 2015-03-03
406
407* [CHANGE] Changed the fingerprinting for metrics. THIS WILL INVALIDATE ALL
408 PERSISTED FINGERPRINTS. IF YOU COMPILE THE PROMETHEUS SERVER WITH THIS
409 VERSION, YOU HAVE TO WIPE THE PREVIOUSLY CREATED STORAGE.
410* [CHANGE] LabelValuesToSignature removed. (Nobody had used it, and it was
411 arguably broken.)
412* [CHANGE] Vendored dependencies. Those are only used by the Makefile. If
413 client_golang is used as a library, the vendoring will stay out of your way.
414* [BUGFIX] Remove a weakness in the fingerprinting for metrics. (This made
415 the fingerprinting change above necessary.)
416* [FEATURE] Added new fingerprinting functions SignatureForLabels and
417 SignatureWithoutLabels to be used by the Prometheus server. These functions
418 require fewer allocations than the ones currently used by the server.
419
420## 0.2.0 / 2015-02-23
421
422* [FEATURE] Introduce new Histagram metric type.
423* [CHANGE] Ignore process collector errors for now (better error handling
424 pending).
425* [CHANGE] Use clear error interface for process pidFn.
426* [BUGFIX] Fix Go download links for several archs and OSes.
427* [ENHANCEMENT] Massively improve Gauge and Counter performance.
428* [ENHANCEMENT] Catch illegal label names for summaries in histograms.
429* [ENHANCEMENT] Reduce allocations during fingerprinting.
430* [ENHANCEMENT] Remove cgo dependency. procfs package will only be included if
431 both cgo is available and the build is for an OS with procfs.
432* [CLEANUP] Clean up code style issues.
433* [CLEANUP] Mark slow test as such and exclude them from travis.
434* [CLEANUP] Update protobuf library package name.
435* [CLEANUP] Updated vendoring of beorn7/perks.
436
437## 0.1.0 / 2015-02-02
438
439* [CLEANUP] Introduced semantic versioning and changelog. From now on,
440 changes will be reported in this file.
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