11 Commits (c58e20ad0eb4d2fbce202ae537b2bc81509ec420)

Author	SHA1	Message	Date
beorn7	c58e20ad0e	histogram: Identify native histograms even without observations ... Native histograms without observations and with a zero threshold of zero look the same as classic histograms in the protobuf exposition format. According to https://github.com/prometheus/client_golang/issues/1127 , the idea is to add a no-op span to those histograms to mark them as native histograms. This commit enables Prometheus to detect that no-op span and adds a doc comment to the proto spec describing the behavior. Signed-off-by: beorn7 <beorn@grafana.com>	2 years ago
beorn7	2ea8df4734	histogram: Expose #12305 ... Native histograms without a zero threshold aren't federated properly. This adds a test to prove the specific failure mode, which is that histograms with a zero threshold of zero are federated as classic histograms. The underlying reason is that the protobuf parser identifies a native histogram by detecting a zero bucket or by detecting integer buckets. Therefore, a float histogram with a zero threshold of zero and an unpopulated zero bucket falls through the cracks (no integer buckets, no zero bucket). This commit also addse a test case for the latter. Signed-off-by: beorn7 <beorn@grafana.com>	2 years ago
beorn7	1c3bd04bea	histograms: Modify test to expose bug #12552 ... Signed-off-by: beorn7 <beorn@grafana.com>	2 years ago
beorn7	9e500345f3	textparse/scrape: Add option to scrape both classic and native histograms ... So far, if a target exposes a histogram with both classic and native buckets, a native-histogram enabled Prometheus would ignore the classic buckets. With the new scrape config option `scrape_classic_histograms` set, both buckets will be ingested, creating all the series of a classic histogram in parallel to the native histogram series. For example, a histogram `foo` would create a native histogram series `foo` and classic series called `foo_sum`, `foo_count`, and `foo_bucket`. This feature can be used in a migration strategy from classic to native histograms, where it is desired to have a transition period during which both native and classic histograms are present. Note that two bugs in classic histogram parsing were found and fixed as a byproduct of testing the new feature: 1. Series created from classic _gauge_ histograms didn't get the _sum/_count/_bucket prefix set. 2. Values of classic _float_ histograms weren't parsed properly. Signed-off-by: beorn7 <beorn@grafana.com>	3 years ago
György Krajcsovits	e9b2d87443	Revert change to model/textparse/protobufparse_test.go ... Signed-off-by: György Krajcsovits <gyorgy.krajcsovits@grafana.com>	3 years ago
György Krajcsovits	071426f72f	Add unit test for bucket limit appender ... Refactors textparser test to use a common test utility to create protobuf representation from MetricFamily Signed-off-by: György Krajcsovits <gyorgy.krajcsovits@grafana.com>	3 years ago
beorn7	3f977e89ab	textparse: Add tests for float and gauge histograms ... Signed-off-by: beorn7 <beorn@grafana.com>	3 years ago
Fish-pro	6ed71a229e	Use errors.Is to check for a specific error ... Signed-off-by: Fish-pro <zechun.chen@daocloud.io>	3 years ago
Bryan Boreham	8d350d9e0c	Update package model/textparse tests for new labels.Labels type ... We don't want to touch the result labels now we create them differently. Signed-off-by: Bryan Boreham <bjboreham@gmail.com>	3 years ago
Marc Tudurí	f7df3b86ba	histograms: parse float histograms from proto definition (#11149) ... * histograms: parse float histograms from proto definition Signed-off-by: Marc Tuduri <marctc@protonmail.com> * Improve comment Signed-off-by: Marc Tuduri <marctc@protonmail.com> * Ignore float buckets Signed-off-by: Marc Tuduri <marctc@protonmail.com> * Refactor Histogram() function Signed-off-by: Marc Tuduri <marctc@protonmail.com> * Fix test_float_histogram Signed-off-by: Marc Tuduri <marctc@protonmail.com> * Update model/textparse/protobufparse.go Co-authored-by: Ganesh Vernekar <15064823+codesome@users.noreply.github.com> Signed-off-by: Marc Tudurí <marctc@protonmail.com> * Update protobufparse.go Signed-off-by: Marc Tudurí <marctc@protonmail.com> * Update scrape.go Signed-off-by: Marc Tudurí <marctc@protonmail.com> * Update scrape/scrape.go Co-authored-by: Ganesh Vernekar <15064823+codesome@users.noreply.github.com> Signed-off-by: Marc Tudurí <marctc@protonmail.com> Signed-off-by: Marc Tuduri <marctc@protonmail.com> Signed-off-by: Marc Tudurí <marctc@protonmail.com> Co-authored-by: Ganesh Vernekar <15064823+codesome@users.noreply.github.com>	3 years ago
beorn7	89fb7117c3	textparse: Remove TODO that is actually done ... Signed-off-by: beorn7 <beorn@grafana.com>	3 years ago
beorn7	c40b105efd	histograms: Move to new exposition protobuf format ... This is an incompatible protobuf change. Instrumented targets must include https://github.com/prometheus/client_golang/pull/1092 to make this work. Signed-off-by: beorn7 <beorn@grafana.com>	3 years ago