Commit graph

59 commits

Author SHA1 Message Date
Julien Pivotto 20ab94fedf
Hints: Separating out the range and offsets of PromQL subqueries (#7667)
Fix #7629

Signed-off-by: Julien Pivotto <roidelapluie@inuits.eu>
2020-08-11 07:21:39 +01:00
Bartlomiej Plotka e6d7cc5fa4
tsdb: Added ChunkQueryable implementations to db; unified MergeSeriesSets and vertical to single struct. (#7069)
* tsdb: Added ChunkQueryable implementations to db; unified compactor, querier and fanout block iterating.

Chained to https://github.com/prometheus/prometheus/pull/7059

* NewMerge(Chunk)Querier now takies multiple primaries allowing tsdb DB code to use it.
* Added single SeriesEntry / ChunkEntry for all series implementations.
* Unified all vertical, and non vertical for compact and querying to single
merge series / chunk sets by reusing VerticalSeriesMergeFunc for overlapping algorithm (same logic as before)
* Added block (Base/Chunk/)Querier for block querying. We then use populateAndTomb(Base/Chunk/) to iterate over chunks or samples.
* Refactored endpoint tests and querier tests to include subtests.

Signed-off-by: Bartlomiej Plotka <bwplotka@gmail.com>

* Addressed comments from Brian and Beorn.

Signed-off-by: Bartlomiej Plotka <bwplotka@gmail.com>

* Fixed snapshot test and added chunk iterator support for DBReadOnly.

Signed-off-by: Bartlomiej Plotka <bwplotka@gmail.com>

* Fixed race when iterating over Ats first.

Signed-off-by: Bartlomiej Plotka <bwplotka@gmail.com>

* Fixed tests.

Signed-off-by: Bartlomiej Plotka <bwplotka@gmail.com>

* Fixed populate block tests.

Signed-off-by: Bartlomiej Plotka <bwplotka@gmail.com>

* Fixed endpoints test.

Signed-off-by: Bartlomiej Plotka <bwplotka@gmail.com>

* Fixed test.

Signed-off-by: Bartlomiej Plotka <bwplotka@gmail.com>

* Added test & fixed case of head open chunk.

Signed-off-by: Bartlomiej Plotka <bwplotka@gmail.com>

* Fixed DBReadOnly tests and bug producing 1 sample chunks.

Signed-off-by: Bartlomiej Plotka <bwplotka@gmail.com>

* Added cases for partial block overlap for multiple full chunks.

Signed-off-by: Bartlomiej Plotka <bwplotka@gmail.com>

* Added extra tests for chunk meta after compaction.

Signed-off-by: Bartlomiej Plotka <bwplotka@gmail.com>

* Fixed small vertical merge bug and added more tests for that.

Signed-off-by: Bartlomiej Plotka <bwplotka@gmail.com>
2020-07-31 16:03:02 +01:00
Julien Pivotto 93e9c010f3
Add more Go leak tests (#7652)
* Implement go leak test for promql

Signed-off-by: Julien Pivotto <roidelapluie@inuits.eu>

* Implement go leak test for Consul SD

Signed-off-by: Julien Pivotto <roidelapluie@inuits.eu>

* Implement go leak test in discovery manager

Signed-off-by: Julien Pivotto <roidelapluie@inuits.eu>
2020-07-24 10:10:20 +01:00
Bartlomiej Plotka 841b13641c
promql: Refactored subquery hint tests and added todos. (#7636)
* promql: Refactorer subquery hint tests and added todos.

Signed-off-by: Bartlomiej Plotka <bwplotka@gmail.com>

* fmt.


Signed-off-by: Bartlomiej Plotka <bwplotka@gmail.com>

* Fixes.

Signed-off-by: Bartlomiej Plotka <bwplotka@gmail.com>
2020-07-23 23:05:43 +01:00
Bartlomiej Plotka a0df8a383a
promql: Removed global and add ability to have better interval for subqueries if not specified (#7628)
* promql: Removed global and add ability to have better interval for subqueries if not specified

## Changes
* Refactored tests for better hints testing
* Added various TODO in places to enhance.
* Moved DefaultEvalInterval global to opts with func(rangeMillis int64) int64 function instead

Motivation: At Thanos we would love to have better control over the subqueries step/interval.
This is important to choose proper resolution. I think having proper step also does not harm for
Prometheus and remote read users. Especially on stateless querier we do not know evaluation interval
and in fact putting global can be wrong to assume for Prometheus even.

I think ideally we could try to have at least 3 samples within the range, the same
way Prometheus UI and Grafana assumes.

Anyway this interfaces allows to decide on promQL user basis.

Open question: Is taking parent interval a smart move?

Motivation for removing global: I spent 1h fighting with:


=== RUN   TestEvaluations
    TestEvaluations: promql_test.go:31: unexpected error: error evaluating query "absent_over_time(rate(nonexistant[5m])[5m:])" (line 687): unexpected error: runtime error: integer divide by zero
--- FAIL: TestEvaluations (0.32s)
FAIL

At the end I found that this fails on most of the versions including this master if you run this test alone. If run together with many
other tests it passes. This is due to SetDefaultEvaluationInterval(1 * time.Minute)
in test that is ran before TestEvaluations. Thanks to globals (:

Let's fix it by dropping this global.

Signed-off-by: Bartlomiej Plotka <bwplotka@gmail.com>

* Added issue links for TODOs.

Signed-off-by: Bartlomiej Plotka <bwplotka@gmail.com>

* Removed irrelevant changes.

Signed-off-by: Bartlomiej Plotka <bwplotka@gmail.com>
2020-07-22 14:39:51 +01:00
Kemal Akkoyun 66dfb951c4
*: Consistent Error/Warning handling for SeriesSet iterator: Allowing Async Select (#7251)
* Add errors and Warnings to SeriesSet

Signed-off-by: Kemal Akkoyun <kakkoyun@gmail.com>

* Change Querier interface and refactor accordingly

Signed-off-by: Kemal Akkoyun <kakkoyun@gmail.com>

* Refactor promql/engine to propagate warnings at eval stage

Signed-off-by: Kemal Akkoyun <kakkoyun@gmail.com>

* Address review issues

Signed-off-by: Kemal Akkoyun <kakkoyun@gmail.com>

* Make sure all the series from all Selects are pre-advanced

Signed-off-by: Kemal Akkoyun <kakkoyun@gmail.com>

* Address review issues

Signed-off-by: Kemal Akkoyun <kakkoyun@gmail.com>

* Separate merge series sets

Signed-off-by: Kemal Akkoyun <kakkoyun@gmail.com>

* Clean

Signed-off-by: Kemal Akkoyun <kakkoyun@gmail.com>

* Refactor merge querier failure handling

Signed-off-by: Kemal Akkoyun <kakkoyun@gmail.com>

* Refactored and simplified fanout with improvements from incoming chunk iterator PRs.

* Secondary logic is hidden, instead of weird failed series set logic we had.
* Fanout is well commented
* Fanout closing record all errors
* MergeQuerier improved API (clearer)
* deferredGenericMergeSeriesSet is not needed as we return no samples anyway for failed series sets (next = false).

Signed-off-by: Bartlomiej Plotka <bwplotka@gmail.com>

* Fix formatting

Signed-off-by: Kemal Akkoyun <kakkoyun@gmail.com>

* Fix CI issues

Signed-off-by: Kemal Akkoyun <kakkoyun@gmail.com>

* Added final tests for error handling.

Signed-off-by: Bartlomiej Plotka <bwplotka@gmail.com>

* Addressed Brian's comments.

* Moved hints in populate to be allocated only when needed.
* Used sync.Once in secondary Querier to achieve all-or-nothing partial response logic.
* Select after first Next is done will panic.

NOTE: in lazySeriesSet in theory we could just panic, I think however we can
totally just return error, it will panic in expand anyway.

Signed-off-by: Bartlomiej Plotka <bwplotka@gmail.com>

* Utilize errWithWarnings

Signed-off-by: Kemal Akkoyun <kakkoyun@gmail.com>

* Fix recently introduced expansion issue

Signed-off-by: Kemal Akkoyun <kakkoyun@gmail.com>

* Add tests for secondary querier error handling

Signed-off-by: Kemal Akkoyun <kakkoyun@gmail.com>

* Implement lazy merge

Signed-off-by: Kemal Akkoyun <kakkoyun@gmail.com>

* Add name to test cases

Signed-off-by: Kemal Akkoyun <kakkoyun@gmail.com>

* Reorganize

Signed-off-by: Kemal Akkoyun <kakkoyun@gmail.com>

* Address review comments

Signed-off-by: Kemal Akkoyun <kakkoyun@gmail.com>

* Address review comments

Signed-off-by: Kemal Akkoyun <kakkoyun@gmail.com>

* Remove redundant warnings

Signed-off-by: Kemal Akkoyun <kakkoyun@gmail.com>

* Fix rebase mistake

Signed-off-by: Kemal Akkoyun <kakkoyun@gmail.com>

Co-authored-by: Bartlomiej Plotka <bwplotka@gmail.com>
2020-06-09 17:57:31 +01:00
Julien Pivotto 4284dd1f1b
promql: cleanup: use errors.As (#7351)
This was TODO because circleci was not in go1.13 yet.

Signed-off-by: Julien Pivotto <roidelapluie@inuits.eu>
2020-06-05 19:51:25 +02:00
Brian Brazil 3932a7149f
Correctly track points no longer used by matrixIterSlice's slice. (#7307)
Signed-off-by: Brian Brazil <brian.brazil@robustperception.io>
2020-05-28 13:36:30 +01:00
Bartlomiej Plotka fe802f29c9 storage: Removed SelectSorted method; Simplified interface; Added requirement for remote read to sort response.
This is technically BREAKING CHANGE, but it was like this from the beginning: I just notice that we rely in
Prometheus on remote read being sorted. This is because we use selected data from remote reads in MergeSeriesSet
which rely on sorting.

I found during work on https://github.com/prometheus/prometheus/pull/5882 that
we do so many repetitions because of this, for not good reason. I think
I found a good balance between convenience and readability with just one method.
Smaller the interface = better.

Also I don't know what TestSelectSorted was testing, but now it's testing sorting.

Signed-off-by: Bartlomiej Plotka <bwplotka@gmail.com>
2020-03-13 13:06:25 +00:00
Tobias Guggenmos 273ea9093a Fix promql tests
Signed-off-by: Tobias Guggenmos <tguggenm@redhat.com>
2020-02-17 16:09:23 +01:00
Tobias Guggenmos 2f1113479f Fix usages of ValueType
Signed-off-by: Tobias Guggenmos <tguggenm@redhat.com>
2020-02-17 16:05:21 +01:00
Zhou Hao e628fd7735
fix comments spelling (#6829)
Signed-off-by: Zhou Hao <zhouhao@cn.fujitsu.com>
2020-02-17 12:45:11 +01:00
Julien Pivotto ff0003e072
Make lookbackDelta a option of QueryEngine (#6746)
* Make lookbackDelta a option of QueryEngine

Signed-off-by: Julien Pivotto <roidelapluie@inuits.eu>

* julius' suggestion

Signed-off-by: Julien Pivotto <roidelapluie@inuits.eu>

* remove trivial getter

Signed-off-by: Julien Pivotto <roidelapluie@inuits.eu>

* Assume lookback delta is always > 0

Signed-off-by: Julien Pivotto <roidelapluie@inuits.eu>

* add debug log

Signed-off-by: Julien Pivotto <roidelapluie@inuits.eu>

* don't expose loopback delta

Signed-off-by: Julien Pivotto <roidelapluie@inuits.eu>

* Specify that lookack delta is also used in federation

Signed-off-by: Julien Pivotto <roidelapluie@inuits.eu>

* Fix federation test

While we have added some logic to the promql engine to keep it backwards
compatible and have a 5 minute loopback by default, the web/ package is
likely to really be internal to Prometheus and we should not add the
same kind of heuritstics here.

Signed-off-by: Julien Pivotto <roidelapluie@inuits.eu>

* loopback delta: Fix debug log

Signed-off-by: Julien Pivotto <roidelapluie@inuits.eu>
2020-02-10 00:58:23 +01:00
Julien Pivotto 9adad8ad30 Remove MaxConcurrent from the PromQL engine opts (#6712)
Since we use ActiveQueryTracker to check for concurrency in
d992c36b3a it does not make sense to keep
the MaxConcurrent value as an option of the PromQL engine.

This pull request removes it from the PromQL engine options, sets the
max concurrent metric to -1 if there is no active query tracker, and use
the value of the active query tracker otherwise.

It removes dead code and also will inform people who import the promql
package that we made that change, as it breaks the EngineOpts struct.

Signed-off-by: Julien Pivotto <roidelapluie@inuits.eu>
2020-01-28 20:38:49 +00:00
Brian Brazil 61262159c4 Simplify benchmark given the new API
Signed-off-by: Brian Brazil <brian.brazil@robustperception.io>
2020-01-28 14:38:09 +00:00
Brian Brazil 38d32e0686 Don't sort postings if we only have one block.
Sorting the heads postings can be quite slow.
We only need sorted series when merging with another
querier, so only sort then.
This will make big queries that only touch the head faster,
though queries that touch both the head and a block will still
be the same speed. This probably won't help much with graphing
unless the range is under an hour, however it should make most
recording rules faster.

Add gaurantee that remote read streaming produces sorted series.

PromQL benchmarks for histograms show only 2-3% improvement, but
they're only over 1k series.

benchmark                                                old ns/op      new ns/op      delta
BenchmarkQuerierSelect/Head/1of1000000-4                 1375486282     507657736      -63.09%
BenchmarkQuerierSelect/Head/10of1000000-4                1387859004     507769850      -63.41%
BenchmarkQuerierSelect/Head/100of1000000-4               1387087935     506029110      -63.52%
BenchmarkQuerierSelect/Head/1000of1000000-4              1386869064     504521986      -63.62%
BenchmarkQuerierSelect/Head/10000of1000000-4             1386213685     505210422      -63.55%
BenchmarkQuerierSelect/Head/100000of1000000-4            1392754988     529842406      -61.96%
BenchmarkQuerierSelect/Head/1000000of1000000-4           1569414722     725059506      -53.80%
BenchmarkQuerierSelect/SortedHead/1of1000000-4           1381019902     1370495863     -0.76%
BenchmarkQuerierSelect/SortedHead/10of1000000-4          1375696209     1366789468     -0.65%
BenchmarkQuerierSelect/SortedHead/100of1000000-4         1386009422     1364519297     -1.55%
BenchmarkQuerierSelect/SortedHead/1000of1000000-4        1377700532     1364486191     -0.96%
BenchmarkQuerierSelect/SortedHead/10000of1000000-4       1383539536     1369545314     -1.01%
BenchmarkQuerierSelect/SortedHead/100000of1000000-4      1410089163     1394731339     -1.09%
BenchmarkQuerierSelect/SortedHead/1000000of1000000-4     1634744148     1581554956     -3.25%
BenchmarkQuerierSelect/Block/1of1000000-4                881741242      879839470      -0.22%
BenchmarkQuerierSelect/Block/10of1000000-4               880381562      882846038      +0.28%
BenchmarkQuerierSelect/Block/100of1000000-4              887519357      881016916      -0.73%
BenchmarkQuerierSelect/Block/1000of1000000-4             902194205      883433524      -2.08%
BenchmarkQuerierSelect/Block/10000of1000000-4            892321964      885130170      -0.81%
BenchmarkQuerierSelect/Block/100000of1000000-4           938604466      933527150      -0.54%
BenchmarkQuerierSelect/Block/1000000of1000000-4          1313510845     1295881124     -1.34%

benchmark                                                old allocs     new allocs     delta
BenchmarkQuerierSelect/Head/1of1000000-4                 4000056        4000018        -0.00%
BenchmarkQuerierSelect/Head/10of1000000-4                4000074        4000036        -0.00%
BenchmarkQuerierSelect/Head/100of1000000-4               4000254        4000216        -0.00%
BenchmarkQuerierSelect/Head/1000of1000000-4              4002054        4002016        -0.00%
BenchmarkQuerierSelect/Head/10000of1000000-4             4020054        4020016        -0.00%
BenchmarkQuerierSelect/Head/100000of1000000-4            4200054        4200016        -0.00%
BenchmarkQuerierSelect/Head/1000000of1000000-4           6000054        6000016        -0.00%
BenchmarkQuerierSelect/SortedHead/1of1000000-4           4000071        4000071        +0.00%
BenchmarkQuerierSelect/SortedHead/10of1000000-4          4000089        4000089        +0.00%
BenchmarkQuerierSelect/SortedHead/100of1000000-4         4000269        4000269        +0.00%
BenchmarkQuerierSelect/SortedHead/1000of1000000-4        4002069        4002069        +0.00%
BenchmarkQuerierSelect/SortedHead/10000of1000000-4       4020069        4020069        +0.00%
BenchmarkQuerierSelect/SortedHead/100000of1000000-4      4200069        4200069        +0.00%
BenchmarkQuerierSelect/SortedHead/1000000of1000000-4     6000069        6000069        +0.00%
BenchmarkQuerierSelect/Block/1of1000000-4                6000023        6000022        -0.00%
BenchmarkQuerierSelect/Block/10of1000000-4               6000059        6000058        -0.00%
BenchmarkQuerierSelect/Block/100of1000000-4              6000419        6000418        -0.00%
BenchmarkQuerierSelect/Block/1000of1000000-4             6004019        6004018        -0.00%
BenchmarkQuerierSelect/Block/10000of1000000-4            6040019        6040018        -0.00%
BenchmarkQuerierSelect/Block/100000of1000000-4           6400019        6400018        -0.00%
BenchmarkQuerierSelect/Block/1000000of1000000-4          10000020       10000019       -0.00%

benchmark                                                old bytes     new bytes     delta
BenchmarkQuerierSelect/Head/1of1000000-4                 229192200     176001176     -23.21%
BenchmarkQuerierSelect/Head/10of1000000-4                229193352     176002328     -23.21%
BenchmarkQuerierSelect/Head/100of1000000-4               229204872     176013848     -23.21%
BenchmarkQuerierSelect/Head/1000of1000000-4              229320072     176129048     -23.20%
BenchmarkQuerierSelect/Head/10000of1000000-4             230472072     177281048     -23.08%
BenchmarkQuerierSelect/Head/100000of1000000-4            241992072     188801048     -21.98%
BenchmarkQuerierSelect/Head/1000000of1000000-4           357192072     304001048     -14.89%
BenchmarkQuerierSelect/SortedHead/1of1000000-4           229193928     229193928     +0.00%
BenchmarkQuerierSelect/SortedHead/10of1000000-4          229195080     229195080     +0.00%
BenchmarkQuerierSelect/SortedHead/100of1000000-4         229206600     229206600     +0.00%
BenchmarkQuerierSelect/SortedHead/1000of1000000-4        229321800     229321800     +0.00%
BenchmarkQuerierSelect/SortedHead/10000of1000000-4       230473800     230473800     +0.00%
BenchmarkQuerierSelect/SortedHead/100000of1000000-4      241993800     241993800     +0.00%
BenchmarkQuerierSelect/SortedHead/1000000of1000000-4     357193800     357193800     +0.00%
BenchmarkQuerierSelect/Block/1of1000000-4                227201516     227201500     -0.00%
BenchmarkQuerierSelect/Block/10of1000000-4               227202924     227202908     -0.00%
BenchmarkQuerierSelect/Block/100of1000000-4              227217036     227217020     -0.00%
BenchmarkQuerierSelect/Block/1000of1000000-4             227358156     227358140     -0.00%
BenchmarkQuerierSelect/Block/10000of1000000-4            228769356     228769340     -0.00%
BenchmarkQuerierSelect/Block/100000of1000000-4           242881356     242881340     -0.00%
BenchmarkQuerierSelect/Block/1000000of1000000-4          384001616     384001600     -0.00%

Signed-off-by: Brian Brazil <brian.brazil@robustperception.io>
2020-01-28 09:14:56 +00:00
Julien Pivotto d992c36b3a promql: make active query tracker context-aware (#6701)
* promql: make query logger context-aware
* Remove gate
Signed-off-by: Julien Pivotto <roidelapluie@inuits.eu>
2020-01-27 22:29:44 +00:00
Julien Pivotto cf42888e4d Fix order of testutil.Equals (#6695)
Equals takes the expected value as first parameter, and the actual value
as second parameter.

Signed-off-by: Julien Pivotto <roidelapluie@inuits.eu>
2020-01-27 12:21:59 +00:00
Julien Pivotto 5f27ac3583 Refactor query log fields (#6694)
* Refactor query log fields

Signed-off-by: Julien Pivotto <roidelapluie@inuits.eu>
2020-01-27 09:53:10 +00:00
Julien Pivotto 3fbeee07fa Fix flaky windows test (#6677)
The windows clock is sometime off by 25ms, and as precise as 15ms.

Let's give it more time to avoid flaky tests.

Fix #6672

Signed-off-by: Julien Pivotto <roidelapluie@inuits.eu>
2020-01-22 10:09:31 +00:00
Julien Pivotto 2b2eb79e8b Add windows tests for query logger (#6653)
* Add windows tests
* Do not rely on time.Time in timer

Signed-off-by: Julien Pivotto <roidelapluie@inuits.eu>
2020-01-20 13:17:11 +00:00
Julien Pivotto 9d9bc524e5 Add query log (#6520)
* Add query log, make stats logged in JSON like in the API

Signed-off-by: Julien Pivotto <roidelapluie@inuits.eu>
2020-01-08 13:28:43 +00:00
Garrett 5a9c4acfbf Pushdown aggregator group by through read hint (#6401)
* Pushdown aggregator group by through read hint

Implement https://github.com/prometheus/prometheus/issues/6400

* add temporal aggregation pushdown support

Signed-off-by: xiancli <xiancli@ebay.com>
2019-12-05 14:06:28 +00:00
Alex Dzyoba e3882629ba promql: Move tests to testutil (#6103)
* promql: Move tests to testutil

Signed-off-by: Alex Dzyoba <alex@dzyoba.com>

* promql: Match error type via errors.As in tests

Signed-off-by: Alex Dzyoba <alex@dzyoba.com>

* promql: Remove unused `expectedList` func from lex_test.go

Signed-off-by: Alex Dzyoba <alex@dzyoba.com>
2019-10-09 18:06:53 -06:00
Thomas Jackson 91d7175eaa Add storage.Warnings to LabelValues and LabelNames (#5673)
Fixes #5661

Signed-off-by: Thomas Jackson <jacksontj.89@gmail.com>
2019-06-17 08:31:17 +01:00
Simon Pasquier 45506841e6
*: enable all default linters (#5504)
Signed-off-by: Simon Pasquier <spasquie@redhat.com>
2019-05-03 15:11:28 +02:00
Goutham Veeramachaneni 3cc5f9d880 Make sure subquery range is taken into account for selection (#5467)
* Make sure subquery range is taken into account for selection

Signed-off-by: Goutham Veeramachaneni <gouthamve@gmail.com>
2019-04-17 13:52:41 +01:00
Tariq Ibrahim 8fdfa8abea refine error handling in prometheus (#5388)
i) Uses the more idiomatic Wrap and Wrapf methods for creating nested errors.
ii) Fixes some incorrect usages of fmt.Errorf where the error messages don't have any formatting directives.
iii) Does away with the use of fmt package for errors in favour of pkg/errors

Signed-off-by: tariqibrahim <tariq181290@gmail.com>
2019-03-26 00:01:12 +01:00
Tom Wilkie 6e08029b56
Move err to be the last return value from storage.Select. (#5054)
Signed-off-by: Tom Wilkie <tom.wilkie@gmail.com>
2019-01-02 11:10:13 +00:00
Ganesh Vernekar dbe55c1352 Subquery (#4831)
Signed-off-by: Ganesh Vernekar <cs15btech11018@iith.ac.in>
2018-12-22 13:47:13 +00:00
mknapphrt f0e9196dca Return warnings on a remote read fail (#4832)
Signed-off-by: Mark Knapp <mknapp@hudson-trading.com>
2018-11-30 14:27:12 +00:00
Ganesh Vernekar ca93fd544b /api/v1/labels endpoint for getting all label names (#4835)
* vendor: update tsdb

Signed-off-by: Ganesh Vernekar <cs15btech11018@iith.ac.in>

* /api/v1/labels endpoint

Signed-off-by: Ganesh Vernekar <cs15btech11018@iith.ac.in>

* regex matchers for API

Signed-off-by: Ganesh Vernekar <cs15btech11018@iith.ac.in>

* Add docs

Signed-off-by: Ganesh Vernekar <cs15btech11018@iith.ac.in>

* Matchers behaving as OR

Signed-off-by: Ganesh Vernekar <cs15btech11018@iith.ac.in>

* Removed the matchers

Signed-off-by: Ganesh Vernekar <cs15btech11018@iith.ac.in>

* vendor: update tsdb using go mod

Signed-off-by: Ganesh Vernekar <cs15btech11018@iith.ac.in>

* vendor update: tsdb

Signed-off-by: Ganesh Vernekar <cs15btech11018@iith.ac.in>

* Added LabelNames() to storage.Querier

Signed-off-by: Ganesh Vernekar <cs15btech11018@iith.ac.in>

* Test for api.labelNames

Signed-off-by: Ganesh Vernekar <cs15btech11018@iith.ac.in>

* Nits

Signed-off-by: Ganesh Vernekar <cs15btech11018@iith.ac.in>
2018-11-19 15:51:14 +05:30
Bryan Boreham 9a956872a3 Make ErrorStorage a concrete type not an interface
Since it is used in a type assertion, having it as an alias to the
error interface is the same as saying 'error', i.e. it succeeds for
all types of error.  Change to a struct which is a concrete type and
the type assertion will only succeed if the type is identical.

Signed-off-by: Bryan Boreham <bjboreham@gmail.com>
2018-10-04 13:13:41 +00:00
Callum Styan 9bca041285 WIP: keep track of samples per query, set a max # of samples (#4513)
* keep track of samples per query, set a max # of samples that can be in
memory at once

Signed-off-by: Callum Styan <callumstyan@gmail.com>
2018-10-02 12:59:19 +01:00
Ganesh Vernekar 576ee4d309 Label name check for 'count_values' (#4585)
Signed-off-by: Ganesh Vernekar <cs15btech11018@iith.ac.in>
2018-09-13 15:27:36 +05:30
Anton Tereshchenkov 18bbec050c promql: propagate storage errors 2018-03-14 15:19:22 +01:00
Brian Brazil bf7d87aed2 Cleanup storage from all tests.
Fixed #3299
2018-03-09 07:53:35 +00:00
Fabian Reinartz 7ccd4b39b8 *: implement query params
This adds a parameter to the storage selection interface which allows
query engine(s) to pass information about the operations surrounding a
data selection.
This can for example be used by remote storage backends to infer the
correct downsampling aggregates that need to be provided.
2018-02-13 12:17:22 +01:00
Julius Volz f7e8348a88 Re-add contexts to storage.Storage.Querier() (#3230)
* Re-add contexts to storage.Storage.Querier()

These are needed when replacing the storage by a multi-tenant
implementation where the tenant is stored in the context.

The 1.x query interfaces already had contexts, but they got lost in 2.x.

* Convert promql.Engine to use native contexts
2017-10-04 21:04:15 +02:00
Fabian Reinartz d21f149745 *: migrate to go-kit/log 2017-09-08 22:01:51 +05:30
Fabian Reinartz 25f3e1c424 Merge branch 'master' into mergemaster 2017-08-10 17:04:25 +02:00
Alexey Palazhchenko 695ec0b981 Fix few typos. (#2962) 2017-07-18 13:58:00 +01:00
Goutham Veeramachaneni 507790a357
Rework logging to use explicitly passed logger
Mostly cleaned up the global logger use. Still some uses in discovery
package.

Signed-off-by: Goutham Veeramachaneni <cs14btech11014@iith.ac.in>
2017-06-16 15:52:44 +05:30
Goutham Veeramachaneni baf5b0f0fc Fix error where we look into the future. (#2829)
* Fix error where we look into the future.

So currently we are adding values that are in the future for an older
timestamp. For example, if we have [(1, 1), (150, 2)] we will end up
showing [(1, 1), (2,2)].

Further it is not advisable to call .At() after Next() returns false.

Signed-off-by: Goutham Veeramachaneni <cs14btech11014@iith.ac.in>

* Retuen early if done

Signed-off-by: Goutham Veeramachaneni <cs14btech11014@iith.ac.in>

* Handle Seek() where we reach the end of iterator

Signed-off-by: Goutham Veeramachaneni <cs14btech11014@iith.ac.in>

* Simplify code

Signed-off-by: Goutham Veeramachaneni <cs14btech11014@iith.ac.in>
2017-06-13 07:22:27 +02:00
Brian Brazil fcc88f0e1e query/query_range should return eval timestamp
Query and query_range should return the timestamp
at which an evaluation is performed, not the timestamp
of the data. This is as that's what query range asked
for, and we need to keep query consistent with that.

Query for a matrix remains unchanged, returning the literal
matrix.
2017-05-12 12:00:31 +01:00
Julius Volz c187308366 storage: Contextify storage interfaces.
This is based on https://github.com/prometheus/prometheus/pull/1997.

This adds contexts to the relevant Storage methods and already passes
PromQL's new per-query context into the storage's query methods.
The immediate motivation supporting multi-tenancy in Frankenstein, but
this could also be used by Prometheus's normal local storage to support
cancellations and timeouts at some point.
2016-09-19 16:29:07 +02:00
Julius Volz ed5a0f0abe promql: Allow per-query contexts.
For Weaveworks' Frankenstein, we need to support multitenancy. In
Frankenstein, we initially solved this without modifying the promql
package at all: we constructed a new promql.Engine for every
query and injected a storage implementation into that engine which would
be primed to only collect data for a given user.

This is problematic to upstream, however. Prometheus assumes that there
is only one engine: the query concurrency gate is part of the engine,
and the engine contains one central cancellable context to shut down all
queries. Also, creating a new engine for every query seems like overkill.

Thus, we want to be able to pass per-query contexts into a single engine.

This change gets rid of the promql.Engine's built-in base context and
allows passing in a per-query context instead. Central cancellation of
all queries is still possible by deriving all passed-in contexts from
one central one, but this is now the responsibility of the caller. The
central query context is now created in main() and passed into the
relevant components (web handler / API, rule manager).

In a next step, the per-query context would have to be passed to the
storage implementation, so that the storage can implement multi-tenancy
or other features based on the contextual information.
2016-09-19 15:38:17 +02:00
Julius Volz 3bfec97d46 Make the storage interface higher-level.
See discussion in
https://groups.google.com/forum/#!topic/prometheus-developers/bkuGbVlvQ9g

The main idea is that the user of a storage shouldn't have to deal with
fingerprints anymore, and should not need to do an individual preload
call for each metric. The storage interface needs to be made more
high-level to not expose these details.

This also makes it easier to reuse the same storage interface for remote
storages later, as fewer roundtrips are required and the fingerprint
concept doesn't work well across the network.

NOTE: this deliberately gets rid of a small optimization in the old
query Analyzer, where we dedupe instants and ranges for the same series.
This should have a minor impact, as most queries do not have multiple
selectors loading the same series (and at the same offset).
2016-07-25 13:59:22 +02:00
Jonathan Boulle 38098f8c95 Add missing license headers
Prometheus is Apache 2 licensed, and most source files have the
appropriate copyright license header, but some were missing it without
apparent reason. Correct that by adding it.
2016-04-13 16:08:22 +02:00
Tobias Schmidt e82ef154ee Remove unused code leftovers 2016-04-02 20:20:55 -04:00