Go will not allocate when reading from a map with a key cast from []byte to string.
Also remove some yoloString calls in package `textparse` - call a more suitable library function.
Signed-off-by: Bryan Boreham <bjboreham@gmail.com>
* close sync ch after sender() is stopped
* break if chan is closed
Signed-off-by: liyandi <littlepangdi@163.com>
Co-authored-by: liyandi <liyandi@xiaomi.com>
Fixes#16689
well, maybe not 100%, but should improve it.
Increase the scrape timeout to be more tolerant of slow test and
also use eventually when checking for targets.
Signed-off-by: György Krajcsovits <gyorgy.krajcsovits@grafana.com>
* Reload all scrape pools concurrently
At the moment all scrape pools that need to be reloaded are reloaded one by one. While reloads are ongoing mtxScrape is locked.
For each pool that's being reloaded we need to wait until all targets are updated.
This whole process can take a while and the more scrape pools to reload the longer.
At the same time all pools are independent and there's no real reason to do them one-by-one.
Reload each pool in a seperate goroutine so we finish config reload as ASAP as possible and unlock the mtxScrape.
Signed-off-by: Lukasz Mierzwa <l.mierzwa@gmail.com>
* Address PR review feedback
Signed-off-by: Lukasz Mierzwa <l.mierzwa@gmail.com>
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Signed-off-by: Lukasz Mierzwa <l.mierzwa@gmail.com>
Addresses https://github.com/prometheus/prometheus/issues/16371
This will help with migrating to native histograms with `convert_classic_histograms_to_nhcb` since users may still need to keep the classic histograms during a migration
Signed-off-by: chardch <otwordsne@gmail.com>
The new metric_name_escaping_scheme config option works in parallel with metric_name_validation_scheme and controls which escaping scheme is requested when scraping. When not specified, the scheme will request underscores if the validation scheme is set to legacy, and will request allow-utf-8 when the validation scheme is set to utf8. This setting allows users to allow utf8 names if they like, but explicitly request an escaping scheme rather than UTF-8.
Fixes https://github.com/prometheus/prometheus/issues/16034
Built on https://github.com/prometheus/prometheus/pull/16080
Signed-off-by: Owen Williams <owen.williams@grafana.com>
No need to validate, track, add sample, add exemplar if series isn't
going to be ingested. Basically this is the same as if this series was
dropped by relabelling.
Fixes#16217
Signed-off-by: György Krajcsovits <gyorgy.krajcsovits@grafana.com>
Global and Data Source configurations can specify legacy mode, but Prometheus now requires that the overall validation mode be set to UTF-8
Signed-off-by: Owen Williams <owen.williams@grafana.com>
We use the cache iteration number to detect when the same metric has
occurred twice in a scrape. We need to bump this number at the end of
every scrape, not just successful scrapes.
The `iter` number is also used:
* After a successful scrape, to delete older metrics and metadata.
* To detect when metadata changed in this scrape.
None of those additional cases is broken by incrementing the number
on error.
Signed-off-by: Bryan Boreham <bjboreham@gmail.com>
..instead of *int64. This is as an optimization and ease of use. We already
accepted in many places (proto histograms, PRW) that CT (or any timestamp really) 0
means not set.
Signed-off-by: bwplotka <bwplotka@gmail.com>
The `Accept` header should not include `escape=allow-utf-8` unless
explicitly requested.
Conveniently, there was already a test covering this header's value, it
just required updating so it also asserts that this value in the header
is not set in the cases we don't expect it to be set. I also converted
those tests into table tests to help make failures clearer.
Issue: https://github.com/prometheus/prometheus/issues/15857
Signed-off-by: Matt Hughes <mhughes@uw.co.uk>
Change case order for switch scrapeLoop
This commit changes the ordering in error identification switch cases for better production performance and adds reasonings behind error switch case order as comments.
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Signed-off-by: Laimis Juzeliūnas <asnelaimis@gmail.com>
* model/textparse: Change parser interface Metric(...) string to Labels(...)
Simplified the interface given no one is using the return argument.
Renamed for clarity too.
Found and discussed https://github.com/prometheus/prometheus/pull/15731#discussion_r1950916842
Signed-off-by: bwplotka <bwplotka@gmail.com>
* Fixed comments; optimized not needed copy for om and text.
Signed-off-by: bwplotka <bwplotka@gmail.com>
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Signed-off-by: bwplotka <bwplotka@gmail.com>
Also:
* split benchmark functions to make sure no one compares across parsers.
* testdata file have meaningful names reflecting the type representation
* promtestdata.txt now has all types, taken directly from long running Prometheus (https://demo.do.prometheus.io/)
Needed for https://github.com/prometheus/prometheus/pull/15731
Signed-off-by: bwplotka <bwplotka@gmail.com>
The was a bug (due to confusion?) on the local metadata cache that is cached
by metric family not the series metric name. The fix is to NOT use that local cache
at all (it's still needed for current metadata API implementation, added TODO
on how we can get rid of it).
I went ahead and also rename Metric field in metadata structs to MetricFamily to make
clear it's not always __name__.
Signed-off-by: bwplotka <bwplotka@gmail.com>
Fix issues raised by staticcheck
We are not enabling staticcheck explicitly, though, because it has too many false positives.
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Signed-off-by: Arve Knudsen <arve.knudsen@gmail.com>
Returning 0 from Append means 'unknown', so the series is never cached.
Return arbitrary numbers instead.
Signed-off-by: Bryan Boreham <bjboreham@gmail.com>
Instead of storing discovered labels on every target, recompute them if
required. The `Target` struct now needs to hold some more data required
to recompute them, such as ScrapeConfig.
This moves the load from every Prometheus all of the time, to just when
someone views Service Discovery in the UI.
The way `PopulateLabels` is used changes; you are no longer expected to
call it with a part-populated `labels.Builder`.
The signature of `Target.Labels` changes to take a `labels.Builder`
instead of a `ScratchBuilder`, for consistency with `DiscoveredLabels`.
This will save a lot of work when many targets are filtered out in
relabeling. Combine with `keep_dropped_targets` to avoid ever computing
most labels for dropped targets.
Signed-off-by: Bryan Boreham <bjboreham@gmail.com>
We should never modify (or even shallow copy) Config after config.Load;
added comments and modified GetScrapeConfigs to do so. For GetScrapeConfigs
the validation (even repeated) was likely doing writes (because global fields was 0). We GetScrapeConfigs concurrently
in tests and ApplyConfig causing test races. In prod there were
races but likelyt only to replace 0 with 0, so not too severe.
I removed validation since I don't see anyone using our config.Config without Load.
I had to refactor one test that was doing it, all others use yaml config.
Fixes#15538
Previous attempt: https://github.com/prometheus/prometheus/pull/15634
Signed-off-by: bwplotka <bwplotka@gmail.com>
