prometheus

Commit Graph

Author	SHA1	Message	Date
beorn7	7a8bb8222c	Style cleanup of all the changes in sparsehistogram so far A lot of this code was hacked together, literally during a hackathon. This commit intends not to change the code substantially, but just make the code obey the usual style practices. A (possibly incomplete) list of areas: * Generally address linter warnings. * The `pgk` directory is deprecated as per dev-summit. No new packages should be added to it. I moved the new `pkg/histogram` package to `model` anticipating what's proposed in #9478. * Make the naming of the Sparse Histogram more consistent. Including abbreviations, there were just too many names for it: SparseHistogram, Histogram, Histo, hist, his, shs, h. The idea is to call it "Histogram" in general. Only add "Sparse" if it is needed to avoid confusion with conventional Histograms (which is rare because the TSDB really has no notion of conventional Histograms). Use abbreviations only in local scope, and then really abbreviate (not just removing three out of seven letters like in "Histo"). This is in the spirit of https://github.com/golang/go/wiki/CodeReviewComments#variable-names * Several other minor name changes. * A lot of formatting of doc comments. For one, following https://github.com/golang/go/wiki/CodeReviewComments#comment-sentences , but also layout question, anticipating how things will look like when rendered by `godoc` (even where `godoc` doesn't render them right now because they are for unexported types or not a doc comment at all but just a normal code comment - consistency is queen!). * Re-enabled `TestQueryLog` and `TestEndopints` (they pass now, leaving them disabled was presumably an oversight). * Bucket iterator for histogram.Histogram is now created with a method. * HistogramChunk.iterator now allows iterator recycling. (I think @dieterbe only commented it out because he was confused by the question in the comment.) * HistogramAppender.Append panics now because we decided to treat staleness marker differently. Signed-off-by: beorn7 <beorn@grafana.com>	3 years ago
beorn7	fd5ea4e0b5	Merge branch 'main' into sparsehistogram	3 years ago
Julien Pivotto	63b3e4e5ec	Enable HTTP2 again (#9398 ) We are re-enabling HTTP 2 again. There has been a few bugfixes upstream in go, and we have also enabled ReadIdleTimeout. Fix #7588 Fix #9068 Signed-off-by: Julien Pivotto <roidelapluie@inuits.eu>	3 years ago
Robert Fratto	daf2887fd4	expose scrape.userAgentHeader like remote.UserAgent Signed-off-by: Robert Fratto <robertfratto@gmail.com>	3 years ago
Julien Pivotto	48a101be1b	Allow to tune the scrape tolerance (#9283 ) * Allow to tune the scrape tolerance In most of the classic monitoring use cases, a few milliseconds difference can be omitted. In Prometheus, a few millisecond difference can however make a big difference. Currently, Prometheus will ignore up to 2 ms difference in the alignments. It turns out that for users who can afford a 10ms difference, there is a lot of resources and disk space to win, as shown in this graph, which shows the bytes / samples over a production Prometheus server. You can clearly see the switch from 2ms to 10ms tolerance. This pull request enables the adjustment of the scrape timestamp alignment tolerance. Signed-off-by: Julien Pivotto <roidelapluie@inuits.eu> * Fix golint Signed-off-by: Julien Pivotto <roidelapluie@inuits.eu>	3 years ago
Bryan Boreham	92a3eeac55	Create less garbage when parsing metrics (#9299 ) * Refactor: extract function to make scrapeLoop for testing Signed-off-by: Bryan Boreham <bjboreham@gmail.com> * Add benchmarks for ScrapeLoopAppend For Prometheus and OpenMetrics Signed-off-by: Bryan Boreham <bjboreham@gmail.com> * Create less garbage when parsing metrics Exemplar escapes to heap due to being passed through text-parser interface, but we can reduce the impact by hoisting it out of the loop and resetting it after every use. (Note the cost was paid on every line even when exemplars were disabled) Signed-off-by: Bryan Boreham <bjboreham@gmail.com> * Create less garbage when parsing OpenMetrics After calling parseLVals() we always append the return value, so pass in what we want to append it to and save garbage. Signed-off-by: Bryan Boreham <bjboreham@gmail.com>	3 years ago
Łukasz Mierzwa	f0a26266c0	Add scrape_sample_limit metric This adds a new metric exposing per target scrape sample_limit value. Metrics are only exposed if extra-scrape-metrics feature flag is enabled. scrape_sample_limit will make it easy to monitor and alert on targets getting close to configured sample_limit, which is important given than exceeding sample_limit results in the entire scrape results being rejected. Signed-off-by: Łukasz Mierzwa <l.mierzwa@gmail.com>	3 years ago
SuperQ	31f4108758	Add scrape_timeout_seconds metric Add a new built-in metric `scrape_timeout_seconds` to allow monitoring of the ratio of scrape duration to the scrape timeout. Hide behind a feature flag to avoid additional cardinality by default. Signed-off-by: SuperQ <superq@gmail.com>	3 years ago
Levi Harrison	70f597b033	Configure Scrape Interval and Timeout Via Relabeling (#8911 ) * Configure scrape interval and timeout with labels Signed-off-by: Levi Harrison <git@leviharrison.dev>	3 years ago
Ganesh Vernekar	8b70e87ab9	Merge remote-tracking branch 'upstream/main' into sparse-refactor Signed-off-by: Ganesh Vernekar <ganeshvern@gmail.com>	3 years ago
Arunprasad Rajkumar	5527e26efc	scrape: fix 'target_limit exceeded error' when reloading conf with 0 Signed-off-by: Arunprasad Rajkumar <arajkuma@redhat.com>	3 years ago
beorn7	5de2df752f	Hacky implementation of protobuf parsing This "brings back" protobuf parsing, with the only goal to play with the new sparse histograms. The Prom-2.x style parser is highly adapted to the structure of the Prometheus text format (and later OpenMetrics). Some jumping through hoops is required to feed protobuf into it. This is not meant to be a model for the final implementation. It should just enable sparse histogram ingestion at a reasonable efficiency. Following known shortcomings and flaws: - No tests yet. - Summaries and legacy histograms, i.e. without sparse buckets, are ignored. - Staleness doesn't work (but this could be fixed in the appender, to be discussed). - No tricks have been tried that would be similar to the tricks the text parsers do (like direct pointers into the HTTP response body). That makes things weird here. Tricky optimizations only make sense once the final format is specified, which will almost certainly not be the old protobuf format. (Interestingly, I expect this implementation to be in fact much more efficient than the original protobuf ingestion in Prom-1.x.) - This is using a proto3 version of metrics.proto (mostly to be consistent with the other protobuf uses). However, proto3 sees no difference between an unset field. We depend on that to distinguish between an unset timestamp and the timestamp 0 (1970-01-01, 00:00:00 UTC). In this experimental code, we just assume that timestamp is never specified and therefore a timestamp of 0 always is interpreted as "not set". Signed-off-by: beorn7 <beorn@grafana.com>	3 years ago
Julius Volz	9d495afd2c	Remove trailing zeros in scrape timeout header See https://twitter.com/AviKivity/status/1405147699557638145 and https://twitter.com/juliusvolz/status/1405790211670515712 Signed-off-by: Julius Volz <julius.volz@gmail.com>	3 years ago
Levi Harrison	b5f6f8fb36	Switched to go-kit/log Signed-off-by: Levi Harrison <git@leviharrison.dev>	4 years ago
hanjm	1df05bfd49	Add body_size_limit to prevent bad targets response large body cause Prometheus server OOM (#8827 ) Signed-off-by: hanjm <hanjinming@outlook.com>	4 years ago
Levi Harrison	2826fbeeb7	SD: Add target creation failure counter and change failure handling (#8786 ) * Added metric and changed failure/drop strategy Signed-off-by: Levi Harrison <git@leviharrison.dev>	4 years ago
Callum Styan	8fd73b1d28	Add Exemplar Remote Write support (#8296 ) * Write exemplars to the WAL and send them over remote write. Signed-off-by: Callum Styan <callumstyan@gmail.com> * Update example for exemplars, print data in a more obvious format. Signed-off-by: Callum Styan <callumstyan@gmail.com> * Add metrics for remote write of exemplars. Signed-off-by: Callum Styan <callumstyan@gmail.com> * Fix incorrect slices passed to send in remote write. Signed-off-by: Callum Styan <callumstyan@gmail.com> * We need to unregister the new metrics. Signed-off-by: Callum Styan <callumstyan@gmail.com> * Address review comments Signed-off-by: Callum Styan <callumstyan@gmail.com> * Order of exemplar append vs write exemplar to WAL needs to change. Signed-off-by: Callum Styan <callumstyan@gmail.com> * Several fixes to prevent sending uninitialized or incorrect samples with an exemplar. Fix dropping exemplar for missing series. Add tests for queue_manager sending exemplars Signed-off-by: Martin Disibio <mdisibio@gmail.com> * Store both samples and exemplars in the same timeseries buffer to remove the alloc when building final request, keep sub-slices in separate buffers for re-use Signed-off-by: Martin Disibio <mdisibio@gmail.com> * Condense sample/exemplar delivery tests to parameterized sub-tests Signed-off-by: Martin Disibio <mdisibio@gmail.com> * Rename test methods for clarity now that they also handle exemplars Signed-off-by: Martin Disibio <mdisibio@gmail.com> * Rename counter variable. Fix instances where metrics were not updated correctly Signed-off-by: Martin Disibio <mdisibio@gmail.com> * Add exemplars to LoadWAL benchmark Signed-off-by: Callum Styan <callumstyan@gmail.com> * last exemplars timestamp metric needs to convert value to seconds with ms precision Signed-off-by: Callum Styan <callumstyan@gmail.com> * Process exemplar records in a separate go routine when loading the WAL. Signed-off-by: Callum Styan <callumstyan@gmail.com> * Address review comments related to clarifying comments and variable names. Also refactor sample/exemplar to enqueue prompb types. Signed-off-by: Callum Styan <callumstyan@gmail.com> * Regenerate types proto with comments, update protoc version again. Signed-off-by: Callum Styan <callumstyan@gmail.com> * Put remote write of exemplars behind a feature flag. Signed-off-by: Callum Styan <callumstyan@gmail.com> * Address some of Ganesh's review comments. Signed-off-by: Callum Styan <callumstyan@gmail.com> * Move exemplar remote write feature flag to a config file field. Signed-off-by: Callum Styan <callumstyan@gmail.com> * Address Bartek's review comments. Signed-off-by: Callum Styan <callumstyan@gmail.com> * Don't allocate exemplar buffers in queue_manager if we're not going to send exemplars over remote write. Signed-off-by: Callum Styan <callumstyan@gmail.com> * Add ValidateExemplar function, validate exemplars when appending to head and log them all to WAL before adding them to exemplar storage. Signed-off-by: Callum Styan <callumstyan@gmail.com> * Address more reivew comments from Ganesh. Signed-off-by: Callum Styan <callumstyan@gmail.com> * Add exemplar total label length check. Signed-off-by: Callum Styan <callumstyan@gmail.com> * Address a few last review comments Signed-off-by: Callum Styan <callumstyan@gmail.com> Co-authored-by: Martin Disibio <mdisibio@gmail.com>	4 years ago
Damien Grisonnet	b50f9c1c84	Add label scrape limits (#8777 ) * scrape: add label limits per scrape Add three new limits to the scrape configuration to provide some mechanism to defend against unbound number of labels and excessive label lengths. If any of these limits are broken by a sample from a scrape, the whole scrape will fail. For all of these configuration options, a zero value means no limit. The `label_limit` configuration will provide a mechanism to bound the number of labels per-scrape of a certain sample to a user defined limit. This limit will be tested against the sample labels plus the discovery labels, but it will exclude the __name__ from the count since it is a mandatory Prometheus label to which applying constraints isn't meaningful. The `label_name_length_limit` and `label_value_length_limit` will prevent having labels of excessive lengths. These limits also skip the __name__ label for the same reasons as the `label_limit` option and will also make the scrape fail if any sample has a label name/value length that exceed the predefined limits. Signed-off-by: Damien Grisonnet <dgrisonn@redhat.com> * scrape: add metrics and alert to label limits Add three gauge, one for each label limit to easily access the limit set by a certain scrape target. Also add a counter to count the number of targets that exceeded the label limits and thus were dropped. This is useful for the `PrometheusLabelLimitHit` alert that will notify the users that scraping some targets failed because they had samples exceeding the label limits defined in the scrape configuration. Signed-off-by: Damien Grisonnet <dgrisonn@redhat.com> * scrape: apply label limits to __name__ label Apply limits to the __name__ label that was previously skipped and truncate the label names and values in the error messages as they can be very very long. Signed-off-by: Damien Grisonnet <dgrisonn@redhat.com> * scrape: remove label limits gauges and refactor Remove `prometheus_target_scrape_pool_label_limit`, `prometheus_target_scrape_pool_label_name_length_limit`, and `prometheus_target_scrape_pool_label_value_length_limit` as they are not really useful since we don't have the information on the labels in it. Signed-off-by: Damien Grisonnet <dgrisonn@redhat.com>	4 years ago
Marco Pracucci	4da5c25ea4	Upgrade prometheus/common to v0.21.0 Signed-off-by: Marco Pracucci <marco@pracucci.com>	4 years ago
Julien Pivotto	e14176756f	Merge pull request #8601 from dgl/fix-8243 Ensure that timestamp comparison uses wall clock time	4 years ago
Callum Styan	289ba11b79	Add circular in-memory exemplars storage (#6635 ) * Add circular in-memory exemplars storage Signed-off-by: Callum Styan <callumstyan@gmail.com> Signed-off-by: Tom Wilkie <tom.wilkie@gmail.com> Signed-off-by: Ganesh Vernekar <cs15btech11018@iith.ac.in> Signed-off-by: Martin Disibio <mdisibio@gmail.com> Co-authored-by: Ganesh Vernekar <cs15btech11018@iith.ac.in> Co-authored-by: Tom Wilkie <tom.wilkie@gmail.com> Co-authored-by: Martin Disibio <mdisibio@gmail.com> * Fix some comments, clean up exemplar metrics struct and exemplar tests. Signed-off-by: Callum Styan <callumstyan@gmail.com> * Fix exemplar query api null vs empty array issue. Signed-off-by: Callum Styan <callumstyan@gmail.com> Co-authored-by: Ganesh Vernekar <cs15btech11018@iith.ac.in> Co-authored-by: Tom Wilkie <tom.wilkie@gmail.com> Co-authored-by: Martin Disibio <mdisibio@gmail.com>	4 years ago
David Leadbeater	21a282fabe	Ensure that timestamp comparison uses wall clock time It's not possible to assume subtraction and addition of a time.Time will result in consistent values. Signed-off-by: David Leadbeater <dgl@dgl.cx>	4 years ago
Tom Wilkie	7369561305	Combine Appender.Add and AddFast into a single Append method. (#8489 ) This moves the label lookup into TSDB, whilst still keeping the cached-ref optimisation for repeated Appends. This makes the API easier to consume and implement. In particular this change is motivated by the scrape-time-aggregation work, which I don't think is possible to implement without it as it needs access to label values. Signed-off-by: Tom Wilkie <tom.wilkie@gmail.com>	4 years ago
Brian Brazil	ebe0da7a72	Protect sp.loops from concurrent access. (#8176 ) Manager.reload takes the mutex that would make it safe, however releases it before the goroutines spawned are finished with it. Thus more explicit locking of scrapePool.Sync/stop/reload is needed. Signed-off-by: Brian Brazil <brian.brazil@robustperception.io>	4 years ago
Brian Brazil	3f8e51738c	More granular locking for scrapeLoop. (#8104 ) Don't lock for all of Sync/stop/reload as that holds up /metrics and the UI when they want a list of active/dropped targets. Instead take advantage of the fact that Sync/stop/reload cannot be called concurrently by the scrape Manager and lock just on the targets themselves. Signed-off-by: Brian Brazil <brian.brazil@robustperception.io>	4 years ago
Julien Pivotto	be5ba1a62d	Fix wordings Signed-off-by: Julien Pivotto <roidelapluie@inuits.eu>	4 years ago
Julien Pivotto	671f7c66e5	Adjust comment Signed-off-by: Julien Pivotto <roidelapluie@inuits.eu>	4 years ago
Julien Pivotto	627ff84599	Adjust flag Signed-off-by: Julien Pivotto <roidelapluie@inuits.eu>	4 years ago
Julien Pivotto	536dfb6234	Add an experimental, hidden flag Signed-off-by: Julien Pivotto <roidelapluie@inuits.eu>	4 years ago
Julien Pivotto	b90c7a55da	Simplify logic Signed-off-by: Julien Pivotto <roidelapluie@inuits.eu>	4 years ago
Julien Pivotto	ccc1df3140	Fix comment Signed-off-by: Julien Pivotto <roidelapluie@inuits.eu>	4 years ago
Julien Pivotto	98e14611a5	Move the tolerance logic in the loop function. Signed-off-by: Julien Pivotto <roidelapluie@inuits.eu>	4 years ago
Julien Pivotto	6544f95403	Introduce timestamp tolerance in scrapes Signed-off-by: Julien Pivotto <roidelapluie@inuits.eu>	4 years ago
iurii	bd53b5ff37	Unnecessary go routine spawn. (#7879 ) * Unnecessary go routine spawn. * Remove unnecessary local variable creation. Signed-off-by: iurii <iurii@coins.ph> Co-authored-by: iurii <iurii@coins.ph>	4 years ago
Andy Bursavich	4e6a94a27d	Invert service discovery dependencies (#7701 ) This also fixes a bug in query_log_file, which now is relative to the config file like all other paths. Signed-off-by: Andy Bursavich <abursavich@gmail.com>	4 years ago
Julien Pivotto	2899773b01	Do not stop scrapes in progress during reload (#7752 ) * Do not stop scrapes in progress during reload. Signed-off-by: Julien Pivotto <roidelapluie@inuits.eu>	4 years ago
johncming	5578c96307	scrape: fix typo. (#7712 ) Signed-off-by: johncming <johncming@yahoo.com>	4 years ago
Julien Pivotto	7b5507ce4b	Scrape: defer report (#7700 ) When I started wotking on target_limit, scrapeAndReport did not exist yet. Then I simply rebased my work without thinking. It appears that there is a lot that can be inline if I defer() the report. Signed-off-by: Julien Pivotto <roidelapluie@inuits.eu>	4 years ago
Annanay	ec562f152b	Merge branch 'master' into appender-context Signed-off-by: Annanay <annanayagarwal@gmail.com>	4 years ago
Julien Pivotto	f482c7bdd7	Add per scrape-config targets limit (#7554 ) * Add per scrape-config targets limit Signed-off-by: Julien Pivotto <roidelapluie@inuits.eu>	4 years ago
Annanay	7f98a744e5	Add context to Appender interface Signed-off-by: Annanay <annanayagarwal@gmail.com>	4 years ago
johncming	490f9c664e	scrape: remove two blank lines. (#7610 ) Signed-off-by: johncming <johncming@yahoo.com>	4 years ago
Julien Pivotto	754461b74f	Reuse the same appender for report and scrape (#7562 ) Additionally, implement isolation in collectResultAppender. Signed-off-by: Julien Pivotto <roidelapluie@inuits.eu>	4 years ago
Julien Pivotto	190addffd8	Change Scrape Loop mtx to Mutex (#7553 ) It was still RWLock but we never use the read lock.. Signed-off-by: Julien Pivotto <roidelapluie@inuits.eu>	4 years ago
Brian Brazil	f9d21f10ec	Only relabelling should apply for scrape_samples_scraped_post_relabelling. (#7342 ) More consistent variable names. Fixes #7298 Signed-off-by: Brian Brazil <brian.brazil@robustperception.io>	5 years ago
Brian Brazil	c9565f08aa	Pass reference to checkAddError so appendErrors is updated. (#7294 ) This was preventing the warnings from being logged. Signed-off-by: Brian Brazil <brian.brazil@robustperception.io>	5 years ago
Marek Slabicki	8224ddec23	Capitalizing first letter of all log lines (#7043 ) Signed-off-by: Marek Slabicki <thaniri@gmail.com>	5 years ago
Callum Styan	c453def8c5	Separate scrape add error checking out into it's own function. (#6930 ) * Separate scrape add error checking out into it's own function. Signed-off-by: Callum Styan <callumstyan@gmail.com> * pass sampleLimitError to checkAddError instead of returning an error Signed-off-by: Callum Styan <callumstyan@gmail.com> * Return bool, error from checkAddError so we can properly handle ErrNotFound for AddFast. This should in theory never happen, but the previous code path handled this case. Adds a test for this, which master passes and the previous commit fails. Signed-off-by: Callum Styan <callumstyan@gmail.com> * Address comment changes. Signed-off-by: Callum Styan <callumstyan@gmail.com> * Move sampleAdded inside the loop iteration within append, since that's the only block the variable is used in. Signed-off-by: Callum Styan <callumstyan@gmail.com>	5 years ago
Julien Pivotto	d6ad5551c9	Scrape: do not put staleness marker when cache is reused (#7011 ) * Scrape: do not put staleness marker when cache is reused Signed-off-by: Julien Pivotto <roidelapluie@inuits.eu>	5 years ago
Julien Pivotto	8907ba6235	Make TSDB use storage errors This fixes #6992, which was introduced by #6777. There was an intermediate component which translated TSDB errors into storage errors, but that component was deleted and this bug went unnoticed, until we were watching at the Prombench results. Without this, scrape will fail instead of dropping samples or using "Add" when the series have been garbage collected. Signed-off-by: Julien Pivotto <roidelapluie@inuits.eu>	5 years ago

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101 Commits (4e206c7c774a9b55d7b1c73ff10e721f51fc3f38)