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362 commits

Author SHA1 Message Date
Julius Volz fb44580110 Cleanup/fix program termination sequence.
Change-Id: I2bc58a2583fb079c9ef383cfc7a5e0fbe613f1cd
2013-12-11 15:40:32 +01:00
Julius Volz 740d448983 Use custom timestamp type for sample timestamps and related code.
So far we've been using Go's native time.Time for anything related to sample
timestamps. Since the range of time.Time is much bigger than what we need, this
has created two problems:

- there could be time.Time values which were out of the range/precision of the
  time type that we persist to disk, therefore causing incorrectly ordered keys.
  One bug caused by this was:

  https://github.com/prometheus/prometheus/issues/367

  It would be good to use a timestamp type that's more closely aligned with
  what the underlying storage supports.

- sizeof(time.Time) is 192, while Prometheus should be ok with a single 64-bit
  Unix timestamp (possibly even a 32-bit one). Since we store samples in large
  numbers, this seriously affects memory usage. Furthermore, copying/working
  with the data will be faster if it's smaller.

*MEMORY USAGE RESULTS*
Initial memory usage comparisons for a running Prometheus with 1 timeseries and
100,000 samples show roughly a 13% decrease in total (VIRT) memory usage. In my
tests, this advantage for some reason decreased a bit the more samples the
timeseries had (to 5-7% for millions of samples). This I can't fully explain,
but perhaps garbage collection issues were involved.

*WHEN TO USE THE NEW TIMESTAMP TYPE*
The new clientmodel.Timestamp type should be used whenever time
calculations are either directly or indirectly related to sample
timestamps.

For example:
- the timestamp of a sample itself
- all kinds of watermarks
- anything that may become or is compared to a sample timestamp (like the timestamp
  passed into Target.Scrape()).

When to still use time.Time:
- for measuring durations/times not related to sample timestamps, like duration
  telemetry exporting, timers that indicate how frequently to execute some
  action, etc.

*NOTE ON OPERATOR OPTIMIZATION TESTS*
We don't use operator optimization code anymore, but it still lives in
the code as dead code. It still has tests, but I couldn't get all of them to
pass with the new timestamp format. I commented out the failing cases for now,
but we should probably remove the dead code soon. I just didn't want to do that
in the same change as this.

Change-Id: I821787414b0debe85c9fffaeb57abd453727af0f
2013-12-03 09:11:28 +01:00
Julius Volz c7daedc840 Merge "Add scalar() function." 2013-10-16 15:49:54 +02:00
Julius Volz be8024e18c Add scalar() function.
Change-Id: I1d1183e926a18fc98c9e94bbb9a808a3fb313102
2013-09-17 15:01:16 +02:00
Julius Volz 93a8d03221 Merge "Add alert-expression console links to notifications." 2013-08-24 19:40:50 +02:00
Julius Volz 1eb1ceac8c Add alert-expression console links to notifications.
The ConsoleLinkForExpression() function now escapes console URLs in such a way
that works both in emails and in HTML.

Change-Id: I917bae0b526cbbac28ccd2a4ec3c5ac03ee4c647
2013-08-20 15:45:41 +02:00
Matt T. Proud 7db518d3a0 Abstract high watermark cache into standard LRU.
Conflicts:
	storage/metric/memory.go
	storage/metric/tiered.go
	storage/metric/watermark.go

Change-Id: Iab2aedbd8f83dc4ce633421bd4a55990fa026b85
2013-08-19 12:26:55 +02:00
Julius Volz 0003027dce Add needed trailing spaces in logs. 2013-08-12 18:22:48 +02:00
Julius Volz aa5d251f8d Use github.com/golang/glog for all logging. 2013-08-12 17:54:36 +02:00
Julius Volz 3b970c5133 Add variable interpolation to notification messages.
This includes required refactorings to enable replacing the http client (for
testing) and moving the NotificationReq type definitions to the "notifications"
package, so that this package doesn't need to depend on "rules" anymore and
that it can instead use a representation of the required data which only
includes the necessary fields.
2013-08-12 12:29:08 +02:00
Julius Volz 35ee2cd3cb Add alertmanager notification support to Prometheus.
Alert definitions now also have mandatory SUMMARY and DESCRIPTION fields
that get sent along a firing alert to the alert manager.
2013-07-30 17:23:41 +02:00
Julius Volz 81f0b85013 Return [] instead of null for empty result vectors. 2013-07-25 12:16:32 +02:00
Julius Volz 64b0ade171 Swap rules lexer for much faster one.
This swaps github.com/kivikakk/golex for github.com/cznic/golex.

The old lexer would have taken 3.5 years to load a set of 5000 test rules
(quadratic time complexity for input length), whereas this one takes only 32ms.
Furthermore, since the new lexer is embedded differently, this gets rid of the
global parser variables and makes the rule loader fully reentrant without a
lock.
2013-07-11 19:35:29 +02:00
Julius Volz d2da21121c Implement getValueRangeAtIntervalOp for faster range queries.
This also short-circuits optimize() for now, since it is complex to implement
for the new operator, and ops generated by the query layer already fulfill the
needed invariants. We should still investigate later whether to completely
delete operator optimization code or extend it to support
getValueRangeAtIntervalOp operators.
2013-06-26 18:10:36 +02:00
Matt T. Proud 30b1cf80b5 WIP - Snapshot of Moving to Client Model. 2013-06-25 15:52:42 +02:00
Julius Volz 8ee7947b1e Ensure metric name is dropped correctly from alert labels in UI. 2013-06-14 13:03:19 +02:00
Julius Volz 0226d1ac7a Implement alerts dashboard and expression console links. 2013-06-13 22:35:40 +02:00
Julius Volz ba29d07901 Show loaded rules in Status dashboard. 2013-06-11 11:39:31 +02:00
Julius Volz fc97e688c6 Improve printing of rules and expressions. 2013-06-11 11:39:31 +02:00
Julius Volz 74cb676537 Implement Stringer interface for rules and all their children. 2013-06-07 15:54:32 +02:00
Matt T. Proud 2c3df44af6 Ensure database access waits until it is started.
This commit introduces a channel message to ensure serving
state has been reached with the storage stack before anything attempts
to use it.
2013-06-06 10:42:21 +02:00
Julius Volz 51689d965d Add debug timers to instant and range queries.
This adds timers around several query-relevant code blocks. For now, the
query timer stats are only logged for queries initiated through the UI.
In other cases (rule evaluations), the stats are simply thrown away.

My hope is that this helps us understand where queries spend time,
especially in cases where they sometimes hang for unusual amounts of
time.
2013-06-05 18:32:54 +02:00
Julius Volz adb87816f4 Put RuleManager concurrency in hands of caller, fix races. 2013-06-05 13:56:56 +02:00
Julius Volz 138334fb31 Fix handling of negative deltas for non-counter values. 2013-05-28 17:36:53 +02:00
Julius Volz 66d4620061 Don't assume delta has at least one sample per vector element. 2013-05-28 14:02:36 +02:00
Julius Volz 21c3be0814 Skip any empty range/boundary elements, not only nil ones. 2013-05-28 14:02:08 +02:00
Matt T. Proud c10780c966 Introduce telemetry for rule evaluator durations.
This commit adds telemetry for the Prometheus expression rule
evaluator, which will enable meta-Prometheus monitoring of customers
to ensure that no instance is falling behind in answering routine
queries.

A few other sundry simplifications are introduced, too.
2013-05-23 21:29:27 +02:00
Julius Volz 750f862d9a Use GetBoundaryValues() for non-counter deltas. 2013-05-22 19:13:47 +02:00
Julius Volz 5b105c77fc Repointerize fingerprints. 2013-05-21 14:28:14 +02:00
Matt T. Proud 8f4c7ece92 Destroy naked returns in half of corpus.
The use of naked return values is frowned upon.  This is the first
of two bulk updates to remove them.
2013-05-16 10:53:25 +03:00
juliusv 516101f015 Merge pull request #250 from prometheus/refactor/drop-unused-storage-setting
Drop unused writeMemoryInterval
2013-05-14 08:45:59 -07:00
juliusv 9ff00b651d Merge pull request #251 from prometheus/fix/memory-metric-mutability
Fix GetMetricForFingerprint() metric mutability.
2013-05-14 08:12:45 -07:00
Bernerd Schaefer 63d9988b9c Drop unused writeMemoryInterval 2013-05-14 17:03:03 +02:00
Bernerd Schaefer aa96c7d141 Fix rules_test.go
This is smelly, but for now we copy a helper method from the metric
tests into rules.
2013-05-14 16:55:18 +02:00
Julius Volz 83c60ad43a Fix GetMetricForFingerprint() metric mutability.
Some users of GetMetricForFingerprint() end up modifying the returned metric
labelset. Since the memory storage's implementation of
GetMetricForFingerprint() returned a pointer to the metric (and maps are
reference types anyways), the external mutation propagated back into the memory
storage.

The fix is to make a copy of the metric before returning it.
2013-05-14 16:46:30 +02:00
Bernerd Schaefer 428d91c86f Rename test helper files to helpers_test.go
This ensures that these files are properly included only in testing.
2013-05-14 16:30:47 +02:00
Matt T. Proud 244a4a9cdb Update to go1.1.
This commit updates the documentation, Makefiles, formatting, and
code semantics to support the 1.1. runtime, which includes ...

1. ``make advice``,

2. ``make format``, and

3. ``go fix`` on various targets.
2013-05-14 12:39:08 +02:00
Matt T. Proud 161c8fbf9b Include deletion processor for long-tail values.
This commit extracts the model.Values truncation behavior into the actual
tiered storage, which uses it and behaves in a peculiar way—notably the
retention of previous elements if the chunk were to ever go empty.  This is
done to enable interpolation between sparse sample values in the evaluation
cycle.  Nothing necessarily new here—just an extraction.

Now, the model.Values TruncateBefore functionality would do what a user
would expect without any surprises, which is required for the
DeletionProcessor, which may decide to split a large chunk in two if it
determines that the chunk contains the cut-off time.
2013-05-10 12:19:12 +02:00
Julius Volz 0877680761 Implement a COUNT ... BY aggregation operator.
This also removes the now obsolete scalar count() function and corrects the
expressions test naming (broken in
2202cd71c9 (L6R59))
so that the expression tests will actually run.
2013-05-08 16:35:16 +02:00
Julius Volz 56324d8ce2 Make AST query storage non-global. 2013-05-07 13:15:10 +02:00
Matt T. Proud ce45787dbf Storage interface to TieredStorage.
This commit drops the Storage interface and just replaces it with a
publicized TieredStorage type.  Storage had been anticipated to be
used as a wrapper for testability but just was not used due to
practicality.  Merely overengineered.  My bad.  Anyway, we will
eventually instantiate the TieredStorage dependencies in main.go and
pass them in for more intelligent lifecycle management.

These changes will pave the way for managing the curators without
Law of Demeter violations.
2013-05-03 15:54:14 +02:00
Julius Volz 9cea5d9df8 Convert the Prometheus configuration to protocol buffers. 2013-04-30 22:26:00 +02:00
Julius Volz d8110fcd9c Send sample arrays instead of single samples over channels. 2013-04-29 17:24:17 +02:00
Julius Volz dcf2e82752 Cleanup and idiomaticize rule/expression dot graph output. 2013-04-29 12:57:34 +02:00
Matt T. Proud b3e34c6658 Implement batch database sample curator.
This commit introduces to Prometheus a batch database sample curator,
which corroborates the high watermarks for sample series against the
curation watermark table to see whether a curator of a given type
needs to be run.

The curator is an abstract executor, which runs various curation
strategies across the database.  It remarks the progress for each
type of curation processor that runs for a given sample series.

A curation procesor is responsible for effectuating the underlying
batch changes that are request.  In this commit, we introduce the
CompactionProcessor, which takes several bits of runtime metadata and
combine sparse sample entries in the database together to form larger
groups.  For instance, for a given series it would be possible to
have the curator effectuate the following grouping:

- Samples Older than Two Weeks: Grouped into Bunches of 10000
- Samples Older than One Week: Grouped into Bunches of 1000
- Samples Older than One Day: Grouped into Bunches of 100
- Samples Older than One Hour: Grouped into Bunches of 10

The benefits hereof of such a compaction are 1. a smaller search
space in the database keyspace, 2. better employment of compression
for repetious values, and 3. reduced seek times.
2013-04-27 17:38:18 +02:00
Julius Volz 2202cd71c9 Track alerts over time and write out alert timeseries. 2013-04-26 14:35:21 +02:00
Julius Volz c0601abf46 Implement initial no-op alert parsing and rule parsing tests. 2013-04-23 13:48:24 +02:00
Matt T. Proud f9e99bd08a Refresh SampleValue to 64-bit floating point.
We always knew that this needed to be fixed.
2013-04-21 20:31:50 +02:00
Julius Volz 99dcbe0f94 Integrate memory and disk layers in view rendering. 2013-04-19 16:01:27 +02:00
Julius Volz 63625bd244 Make view use memory persistence, remove obsolete code.
This makes the memory persistence the backing store for views and
adjusts the MetricPersistence interface accordingly. It also removes
unused Get* method implementations from the LevelDB persistence so they
don't need to be adapted to the new interface. In the future, we should
rethink these interfaces.

All staleness and interpolation handling is now removed from the storage
layer and will be handled only by the query layer in the future.
2013-04-18 22:26:29 +02:00
Julius Volz 1eb586db7d Fix rule evaluation closure. 2013-04-17 15:11:21 +02:00
Julius Volz 5f5ea03105 Run "make format". 2013-04-16 17:23:59 +02:00
Julius Volz 1cff4f3d91 Fix rate() per-second adjustment.
This got broken during the depointerization of the Vector type.
2013-04-15 14:41:34 +02:00
juliusv 62f33f1fc2 Merge pull request #138 from prometheus/julius-fix-aliasing
Correct delta()/rate() intervals and temporal aliasing.
2013-04-15 05:38:48 -07:00
Matt T. Proud 167504efd6 Merge pull request #142 from prometheus/julius-lowercase-by
Allow lower-case BY operator.
2013-04-15 05:13:35 -07:00
Julius Volz d53b8cf956 Correct delta()/rate() intervals and temporal aliasing. 2013-04-15 12:30:46 +02:00
Julius Volz 000f6a2e23 Allow lower-case BY operator. 2013-04-15 11:56:23 +02:00
Julius Volz a0d311c9e6 Constantize job name label. 2013-04-15 11:47:54 +02:00
Julius Volz 1bc83e1b65 Also allow lower-cased aggregation ops. 2013-04-11 18:25:22 +02:00
juliusv f9c291120f Merge pull request #123 from prometheus/julius-propagate-rule-errors
Propagate more errors during rule evaluation.
2013-04-11 06:38:33 -07:00
Julius Volz 9a81b9838f Make expression parser goroutine-safe.
See https://github.com/prometheus/prometheus/issues/127
2013-04-10 19:17:28 +02:00
Julius Volz 6cb3c51d24 Add sort() and sort_desc() expression language functions. 2013-04-10 18:05:45 +02:00
Julius Volz c4d0969c00 Propagate more errors during rule evaluation. 2013-04-09 13:47:20 +02:00
Julius Volz e31591e6fe Allow single-letter identifiers (metric and label names). 2013-03-28 18:37:54 +01:00
Julius Volz ec413459fa Depointerize Matrix/Vector types as well as time.Time arguments. 2013-03-28 18:07:12 +01:00
Julius Volz 676845afaf Implement sample interpolation in query layer. 2013-03-28 16:41:51 +01:00
Matt T. Proud c53a72a894 Test data for the curator. 2013-03-27 18:13:43 +01:00
Julius Volz b836066c71 Eliminate need to get fingerprints during query execution time. 2013-03-27 14:42:03 +01:00
Julius Volz 55ca65aa6e More userfriendly output when we fail to create the tiered storage. 2013-03-27 11:25:05 +01:00
Matt T. Proud c4e971d7d9 Merge pull request #101 from prometheus/refactor/test/directory-extraction
Create temporary directory handler.
2013-03-26 10:46:28 -07:00
Matt T. Proud b86b0ea41a Create temporary directory handler. 2013-03-26 18:09:25 +01:00
Julius Volz 2b8f0b2cc7 Constantize metric name label name. 2013-03-26 16:20:23 +01:00
Julius Volz 3880a86c9c In case of empty query results, return an empty matrix. 2013-03-25 12:14:48 +01:00
Julius Volz 8e4c5b0cea Use AST query analyzer and views with tiered storage. 2013-03-21 18:16:52 +01:00
Julius Volz 2f814d0e6d AST persistence adapter simplifications after storage changes. 2013-03-21 18:11:03 +01:00
Julius Volz 6001d22f87 Change Get* methods to receive fingerprints instead of metrics. 2013-03-21 18:11:03 +01:00
Matt T. Proud 5959cd9e53 Include Julius' feedback. 2013-03-21 18:08:48 +01:00
Matt T. Proud a70ee43ad3 Niladic `ToString() to idiomatic String()`. 2013-03-21 18:08:47 +01:00
Matt T. Proud 41068c2e84 Checkpoint. 2013-03-21 18:06:51 +01:00
Matt T. Proud 13ae29b304 Initial in-memory arena implementation.
It is unbounded, and nothing uses it except for a gating flag in main.
2013-02-18 09:38:14 -06:00
Julius Volz c3d31febd6 Move durationToString to common place and cleanup error handling. 2013-02-14 19:02:23 +01:00
Matt T. Proud efbe0e8a12 Interface simplification.
GetMetricForFingerprint(model.Fingerprint) (*Metric, error) ->
GetMetricForFingerprint(model.Fingerprint) (Metric, error)
2013-02-14 08:43:02 -08:00
Matt T. Proud e8a733b525 Interface simplifications.
GetFingerprintsForLabelSet ([]*Fingerprint, error) ->
GetFingerprintsForLabelSet ([]Fingerprint, error)
2013-02-14 08:07:59 -08:00
Matt T. Proud f03091b139 Interface simplifications: GetRangeValues
From pointers to copies.
2013-02-13 21:11:23 -08:00
Matt T. Proud 56f069b3ec Interface simplifications: GetValueAtTime().
Pointer arguments to copies.
2013-02-13 21:05:01 -08:00
Matt T. Proud 900bb988c1 Simplifications of GetFingerprintsForLabelSet.
``MetricPersistence.GetFingerprintsForLabelSet(s *model.LabelSet)`` ->
``MetricPersistence.GetFingerprintsForLabelSet(s model.LabelSet)``.
2013-02-13 17:13:41 -08:00
Matt T. Proud 4fbcea73f5 MetricPersistence.AppendSample signature changes.
``MetricPersistence.AppendSample(*model.Sample)`` -> ``MetricPersistence.AppendSample(model.Sample)``.
2013-02-13 13:46:28 -08:00
Julius Volz 06ace4941d Remove/replace last references to github.com/matttproud/... 2013-02-07 14:32:18 +01:00
Julius Volz 16d9dcd6a8 Add copyright notices to all remaining files. 2013-02-07 11:49:04 +01:00
Julius Volz d67e4b9131 Address outstanding comments from PR/47 and other cleanups. 2013-02-07 11:38:01 +01:00
Matt T. Proud ea54751431 Update import paths to new location.
This repository moved from matttproud/prometheus to
prometheus/prometheus, and all import paths need to be updated.
2013-01-27 18:49:45 +01:00
Julius Volz c049ae39af Cleanups to rules/persistence adapter code. 2013-01-25 12:22:55 +01:00
juliusv 619aa97025 Only close rule file if it could be opened. 2013-01-25 03:32:46 +01:00
Julius Volz a85204a0a4 Add support for matrix duration strings without quotes. 2013-01-22 02:27:26 +01:00
Julius Volz 1760d927c8 Add error propagation to web UI via special JSON error type. 2013-01-22 02:27:26 +01:00
Julius Volz 49c87348b5 Implement per-second rate behavior for rate(). 2013-01-22 02:27:26 +01:00
Julius Volz 93670aa129 Return API errors in JSON format. 2013-01-22 02:27:26 +01:00
Julius Volz a20bf35997 Fix whitespace with "make format". 2013-01-22 02:27:26 +01:00
Julius Volz c21450a089 Use correct label name for metric name in rule. 2013-01-22 02:27:26 +01:00
Julius Volz 6929c10acf Add case-statement for OR, which still needs to be implemented. 2013-01-22 02:27:26 +01:00
Julius Volz a555ded2b3 Add "w" (weeks) as a valid timeunit. 2013-01-22 02:27:26 +01:00
Julius Volz 2c8595f96e First graphing support. 2013-01-22 02:27:26 +01:00
Matt T. Proud efe61c18fa Refactor target scheduling to separate facility.
``Target`` will be refactored down the road to support various
nuanced endpoint types.  Thusly incorporating the scheduling
behavior within it will be problematic.  To that end, the scheduling
behavior has been moved into a separate assistance type to improve
conciseness and testability.

``make format`` was also run.
2013-01-13 10:43:37 +01:00
Julius Volz cb6eb30182 Fix state cleanup bug between rule/config parser runs.
This fixes a bug that has been annoying me minorly for some time now:
sometimes, after parse errors, a subsequent parser run would fail.  The reason
is that yylex() modifies some global variables (yytext, yydata) during its run
to keep state. To make subsequent parser runs correct, these have to be reset
before each run.

Also, close files after reading them.
2013-01-12 02:35:40 +01:00
Julius Volz 17a4a442b3 Add REST API, expression browser, and text/JSON output formats. 2013-01-11 02:27:03 +01:00
Julius Volz 06162180ad Implement matrix range and boundary fetching from metrics store. 2013-01-11 01:19:27 +01:00
Julius Volz 483bd81a44 Allow grammar to parse both rules and single expressions. 2013-01-11 01:17:37 +01:00
Julius Volz c52b959fda Fix matrix interval time calculation. 2013-01-11 01:12:34 +01:00
Julius Volz fdf9a3aab7 Fix node type checks in arithmetic expressions. 2013-01-11 01:09:31 +01:00
Julius Volz c4a2358551 Set correct interval in MatrixLiteral.Eval(). 2013-01-11 01:08:47 +01:00
Julius Volz 429b66019c Exclude metric name in vector arithmetric label matching. 2013-01-11 01:07:48 +01:00
Julius Volz 56384bf42a Add initial config and rule language implementation. 2013-01-07 23:43:36 +01:00