Commit graph

969 commits

Author SHA1 Message Date
Chris Marchbanks a38a54fa11 Split remote write storage into its own type
This allows other processes to reuse just the remote write code without
having to use the remote read code as well. This will be used to create
a sidecar capable of sending remote write payloads.

Signed-off-by: Chris Marchbanks <csmarchbanks@gmail.com>
2019-06-27 10:11:02 +01:00
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
Dmitry Shmulevich 0c0638b080 resolve race condition in maxGauge (#5647)
* resolve race condition in maxGauge

Signed-off-by: Dmitry Shmulevich <dmitry.shmulevich@sysdig.com>
2019-06-13 20:55:08 +01:00
Chris Marchbanks 840872a6f8 Fix remote storage config not updating correctly (#5555)
* Update remote write and remote read separately
* Add external labels to the remote write conf hash
* Add unit tests for remote storage lifecycle

Signed-off-by: Chris Marchbanks <csmarchbanks@gmail.com>
2019-05-17 10:29:49 +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
Callum Styan 3639d51eb6 Remote Storage: string interner should not panic in release (#5487)
* Don't panic if we try to release a string that is not in the interner.

* Move seriesMtx locking in QueueManager's StoreSeries function.

This stops us from calling release for strings that aren't interned if
there's a race between reading a checkpoint and storing new series
labels, which could happen during checkpointing or reloading config.

Signed-off-by: Callum Styan <callumstyan@gmail.com>
2019-04-24 10:46:31 +01:00
Callum Styan e87449b59d Remote Write: Queue Manager specific metrics shouldn't exist if the queue no longer exists (#5445)
* Unregister remote write queue manager specific metrics when stopping the
queue manager.

* Use DeleteLabelValues instead of Unregister to remove queue and watcher
related metrics when we stop them. Create those metrics in the structs
start functions rather than in their constructors because of the
ordering of creation, start, and stop in remote storage ApplyConfig.

* Add setMetrics function to WAL watcher so we can set
the watchers metrics in it's Start function, but not
have to call Start in some tests (causes data race).

Signed-off-by: Callum Styan <callumstyan@gmail.com>
2019-04-23 09:49:17 +01:00
Callum Styan b7538e7b49 Don't stop, recreate, and start remote storage QueueManagers if the (#5485)
remote write config hasn't changed at all.

Signed-off-by: Callum Styan <callumstyan@gmail.com>
2019-04-23 09:47:18 +01:00
Romain Baugue 95193fa027 Exhaust every request body before closing it (#5166) (#5479)
From the documentation:
> The default HTTP client's Transport may not
> reuse HTTP/1.x "keep-alive" TCP connections if the Body is
> not read to completion and closed.

This effectively enable keep-alive for the fixed requests.

Signed-off-by: Romain Baugue <romain.baugue@elwinar.com>
2019-04-18 09:50:37 +01:00
Vasily Sliouniaev 5be9a1426f Prevent reshard concurrent with calling stop (#5460)
* Prevent reshard concurrent with calling stop

Signed-off-by: Vasily <v.sliouniaev@gmail.com>
2019-04-16 11:25:19 +01:00
Callum Styan c2b88992a3 Remote Write: fix checkpoint reading (#5429)
* Fix ReadCheckpoint to ensure that it actually reads all the contents of
each segment in a checkpoint dir, or returns an error.

Signed-off-by: Callum Styan <callumstyan@gmail.com>
2019-04-09 10:52:44 +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 807fd33ecc Review feedback.
- Update read path to use labels.Labels.
- Fix the tests.
- Remove pack.
- Remove unused function.
- Fix race in tests.

Signed-off-by: Tom Wilkie <tom.wilkie@gmail.com>
2019-03-18 20:31:12 +00:00
Callum Styan 1a7923dde3 Add ref counting to string interning so we can remove
a string when there are no longer any refs. Add tests for interning.

Co-authored-by: Tom Wilkie <tom.wilkie@gmail.com>

Signed-off-by: Callum Styan <callumstyan@gmail.com>
2019-03-18 20:31:12 +00:00
Tom Wilkie cbf5f13285 Naive string iterning for labes & values in the remote_write path.
Signed-off-by: Tom Wilkie <tom.wilkie@gmail.com>
2019-03-18 20:31:12 +00:00
Tom Wilkie c7b3535997 Use pkg/relabelling in remote write.
- Unmarshall external_labels config as labels.Labels, add tests.
- Convert some more uses of model.LabelSet to labels.Labels.
- Remove old relabel pkg (fixes #3647).
- Validate external label names.

Signed-off-by: Tom Wilkie <tom.wilkie@gmail.com>
2019-03-18 20:31:12 +00:00
Tom Wilkie 2fa93595d6
More WAL remote_write tweaks. (#5300)
* Consistently pre-lookup the metrics for a given queue in queue manager.
* Don't open the WAL (for writing) in the remote_write code.
* Add some more logging.

Signed-off-by: Tom Wilkie <tom.wilkie@gmail.com>
2019-03-05 12:21:11 +00:00
Krasi Georgiev 1684dc750a
updated tsdb to 0.6.0 (#5292)
* updated tsdb to 0.6.0

as part of the update also added the new storage.tsdb.allow-overlapping-blocks flag and mark it as experimental.
2019-03-04 21:42:45 +02:00
Tariq Ibrahim 1adb91738d fix typo in recordType method of wal_watcher.go (#5297)
Signed-off-by: tariqibrahim <tariq181290@gmail.com>
2019-03-04 17:33:35 +01:00
Tariq Ibrahim ab8e9b7423 fix typo in queue_manager.go comment (#5294)
Signed-off-by: tariqibrahim <tariq181290@gmail.com>
2019-03-03 11:35:29 +00:00
Tom Wilkie 67da8e7b46
Refactor and fix queue resharding (#5286)
- Remove prometheus_remote_queue_last_send_timestamp_seconds metric.  Its not particularly useful, we have highest_timestamp_seconds.
- Factor out maxGauage, a gauge that only increases.
- Change sharding calculations to use max samples in timestamp - max samples out timestamp (not rates).
- Also include the ratio of samples dropped to correctly predict number of pending samples.

Signed-off-by: Tom Wilkie <tom.wilkie@gmail.com>
2019-03-01 11:04:26 -08:00
Callum Styan b8106dd459 Review feedback:
- Add a dropped samples EWMA and use it in calculating desired shards.
- Update metric names and a log messages.
- Limit number of entries in the dedupe logging middleware to prevent potential OOM.

Signed-off-by: Callum Styan <callumstyan@gmail.com>
Signed-off-by: Tom Wilkie <tom.wilkie@gmail.com>
2019-02-28 08:38:39 -08:00
Callum Styan 512f549064 Refactor: inline decodeRecord in readSegment and don't bother decoding samples records if we're not tailing the segment, add a benchmark test and fix some other tests
Co-authored-by: Tom Wilkie <tom.wilkie@gmail.com>
Signed-off-by: Callum Styan <callumstyan@gmail.com>
2019-02-28 08:38:39 -08:00
Tom Wilkie f795942572 Decrement pending sample when queue exits.
Signed-off-by: Tom Wilkie <tom.wilkie@gmail.com>
2019-02-28 08:38:39 -08:00
Tom Wilkie ee7efa93fe Fix some tests.
Signed-off-by: Tom Wilkie <tom.wilkie@gmail.com>
2019-02-28 08:38:39 -08:00
Callum Styan b69bdfb4d1 Store the checkpoint we read last, so that we don't keep reading the same checkpoint on each tick.
Signed-off-by: Callum Styan <callumstyan@gmail.com>
2019-02-28 08:38:39 -08:00
Tom Wilkie efbd9559f4 Deal with corruptions in the WAL:
- If we're replaying the WAL to get series records, skip that segment when we hit corruptions.
- If we're tailing the WAL for samples, fail the watcher.
- When the watcher fails, restart from the latest checkpoint - and only send new samples by updating startTime.
- Tidy up log lines and error handling, don't return so many errors on quiting.
- Expect EOF when processing checkpoints.

Signed-off-by: Tom Wilkie <tom.wilkie@gmail.com>
2019-02-28 08:38:39 -08:00
Tom Wilkie adf5307470 Update wal LiveReader to ensure EOF is correctly propagated.
Signed-off-by: Tom Wilkie <tom.wilkie@gmail.com>
2019-02-28 08:38:39 -08:00
Callum Styan d6258aea8f Fix up remote write tests:
- Tests that created a QueueManager were leaving behind files at the end of tests.
- WAL replaying (readToEnd)tests seem to require extra time to finish now.
- Some fixes to make staticcheck happy

Signed-off-by: Callum Styan <callumstyan@gmail.com>
2019-02-28 08:38:39 -08:00
Tom Wilkie 184f06a981 Combine the record decoding metrics into one; break out garbage collection into a separate function.
Signed-off-by: Tom Wilkie <tom.wilkie@gmail.com>
2019-02-28 08:38:39 -08:00
Tom Wilkie 859cda27ff Remove some 'global' state, moving segment numbers to parameters.
Signed-off-by: Tom Wilkie <tom.wilkie@gmail.com>
2019-02-28 08:38:39 -08:00
Tom Wilkie bdc6b764b0 If reading the WAL fails, try again. Also, read from the segment containing the index for the last checkpoint, not the first segment.
Signed-off-by: Tom Wilkie <tom.wilkie@gmail.com>
2019-02-28 08:38:39 -08:00
Tom Wilkie d6f911b511 Factor out logging ratelimit & dedupe middleware.
Signed-off-by: Tom Wilkie <tom.wilkie@gmail.com>
2019-02-28 08:38:39 -08:00
Tom Wilkie a5c20642b3 Refactor WAL watcher to remove some duplication.
Signed-off-by: Tom Wilkie <tom.wilkie@gmail.com>
2019-02-28 08:38:39 -08:00
Tom Wilkie 37ad4db485 Export timestamps in seconds since epoch.
Signed-off-by: Tom Wilkie <tom.wilkie@gmail.com>
2019-02-28 08:38:39 -08:00
JoeWrightss 362873f72b Fix .Log() error message (#5257)
Signed-off-by: zhoulin xie <zhoulin.xie@daocloud.io>
2019-02-22 14:39:37 +00:00
Simon Pasquier b41d6d54f2
storage/remote: increase timeouts for Travis CI (#5224)
* storage/remote: adapt tests for Travis CI

Signed-off-by: Simon Pasquier <spasquie@redhat.com>

* Check filesystems on Travis environment

Signed-off-by: Simon Pasquier <spasquie@redhat.com>

* Run remote/storage tests on CircleCI for troubleshooting

Signed-off-by: Simon Pasquier <spasquie@redhat.com>

* Try using tmpfs partition

Signed-off-by: Simon Pasquier <spasquie@redhat.com>

* Revert "Try using tmpfs partition"

This reverts commit 85a30deb72.

Signed-off-by: Simon Pasquier <spasquie@redhat.com>

* Don't store labels in writeToMock

Signed-off-by: Simon Pasquier <spasquie@redhat.com>

* Fix data race

Signed-off-by: Simon Pasquier <spasquie@redhat.com>

* Bump retries to 100 meaning that the total timeout is 10s

Signed-off-by: Simon Pasquier <spasquie@redhat.com>

* clean up .travis.yml

Signed-off-by: Simon Pasquier <spasquie@redhat.com>

* code fixup

Signed-off-by: Simon Pasquier <spasquie@redhat.com>

* Remove unneeded empty line

Signed-off-by: Simon Pasquier <spasquie@redhat.com>
2019-02-15 16:47:41 +01:00
Callum Styan 37e35f9e0c Various improvements to WAL based remote write.
- Use the queue name in WAL watcher logging.
- Don't return from watch if the reader error was EOF.
- Fix sample timestamp check logic regarding what samples we send.
- Refactor so we don't need readToEnd/readSeriesRecords
- Fix wal_watcher tests since readToEnd no longer exists

Signed-off-by: Callum Styan <callumstyan@gmail.com>
2019-02-12 11:39:13 +00:00
Tom Wilkie b93bafeee1 Various fixes to locking & shutdown for WAL-based remote write.
- Remove datarace in the exported highest scrape timestamp.
- Backoff on enqueue should be per-sample - reset the result for each sample.
- Remove diffKeys, unused ctx and cancelfunc in WALWatcher, 'name' from writeTo interface, and pass it to constructor.
- Reorder functions in WALWatcher depth-first according to call graph.
- Fix vendor/modules.txt.
- Split out the various timer periods into consts at the top of the file.
- Move w.currentSegmentMetric.Set close to where we set the currentSegment.
- Combine r.Next() and isClosed(w.quit) into a single loop.
- Unnest some ifs in WALWatcher.watch, propagate erros in decodeRecord, add some new lines to make it easier to read.
- Reorganise checkpoint handling to reduce nesting and make it easier to follow.

Signed-off-by: Tom Wilkie <tom.wilkie@gmail.com>
2019-02-12 11:39:13 +00:00
Callum Styan 6f69e31398 Tail the TSDB WAL for remote_write
This change switches the remote_write API to use the TSDB WAL.  This should reduce memory usage and prevent sample loss when the remote end point is down.

We use the new LiveReader from TSDB to tail WAL segments.  Logic for finding the tracking segment is included in this PR.  The WAL is tailed once for each remote_write endpoint specified. Reading from the segment is based on a ticker rather than relying on fsnotify write events, which were found to be complicated and unreliable in early prototypes.

Enqueuing a sample for sending via remote_write can now block, to provide back pressure.  Queues are still required to acheive parallelism and batching.  We have updated the queue config based on new defaults for queue capacity and pending samples values - much smaller values are now possible.  The remote_write resharding code has been updated to prevent deadlocks, and extra tests have been added for these cases.

As part of this change, we attempt to guarantee that samples are not lost; however this initial version doesn't guarantee this across Prometheus restarts or non-retryable errors from the remote end (eg 400s).

This changes also includes the following optimisations:
- only marshal the proto request once, not once per retry
- maintain a single copy of the labels for given series to reduce GC pressure

Other minor tweaks:
- only reshard if we've also successfully sent recently
- add pending samples, latest sent timestamp, WAL events processed metrics

Co-authored-by: Chris Marchbanks <csmarchbanks.com> (initial prototype)
Co-authored-by: Tom Wilkie <tom.wilkie@gmail.com> (sharding changes)
Signed-off-by: Callum Styan <callumstyan@gmail.com>
2019-02-12 11:39:13 +00:00
Goutham Veeramachaneni 384cba1211
Add flag for size based retention (#5109)
* Add flag for size based retention

Signed-off-by: Goutham Veeramachaneni <gouthamve@gmail.com>

* Deprecate the old retention flag for a new one.

Signed-off-by: Goutham Veeramachaneni <gouthamve@gmail.com>

* Add ability to take a suffix for size flag

Signed-off-by: Goutham Veeramachaneni <gouthamve@gmail.com>

* Address feedback

Signed-off-by: Goutham Veeramachaneni <gouthamve@gmail.com>
2019-01-18 19:18:36 +05:30
Krasi Georgiev 3bd41cc92c Udpate tsdb to 0.4 (#5110)
* update tsdb to v0.4.0

Signed-off-by: Krasi Georgiev <kgeorgie@redhat.com>

* remove unused struct field

Signed-off-by: Krasi Georgiev <kgeorgie@redhat.com>
2019-01-18 16:32:14 +05:30
Matt Layher 302148fd69 *: apply gofmt -s
Signed-off-by: Matt Layher <mdlayher@gmail.com>
2019-01-16 17:28:14 -05:00
Callum Styan 5358f76c5c update remote write path proto so that Labels/Timeseries can't be nil (#4957)
Signed-off-by: Callum Styan <callumstyan@gmail.com>
2019-01-15 19:13:39 +00:00
Simon Pasquier f678e27eb6
*: use latest release of staticcheck (#5057)
* *: use latest release of staticcheck

It also fixes a couple of things in the code flagged by the additional
checks.

Signed-off-by: Simon Pasquier <spasquie@redhat.com>

* Use official release of staticcheck

Also run 'go list' before staticcheck to avoid failures when downloading packages.

Signed-off-by: Simon Pasquier <spasquie@redhat.com>
2019-01-04 14:47:38 +01:00
glutamatt 5ddde1965b tune the "Wal segment size" with a flag (#5029)
Add WALSegmentSize as an option, and the corresponding flag "storage.tsdb.wal-segment-size" to tune the max size of wal segment files.

The addressed base problem is to reduce the disk space used by wal segment files : on a raspberry pi, for instance, we often want to reduce write load of the sd card, then, the wal directory is mounted on a memory (space limited) partition.

the default value of the segment max file size, pushed the size of directory to 128 MB for each segment , which is too much ram consumption on a rasp.

the initial discussion is at https://github.com/prometheus/tsdb/pull/450
2019-01-03 17:13:21 +03:00
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
AixesHunter 806632790e update inconsistent comment (#5046)
Co-Authored-By: aixeshunter <44970652+aixeshunter@users.noreply.github.com>
Signed-off-by: aixeshunter <aixeshunter@gmail.com>
2018-12-27 14:02:36 +00:00
Bartek Płotka 62c8337e77 Moved configuration into relabel package. (#4955)
Adapted top dir relabel to use pkg relabel structs.

Removal of this in a separate tracked here: https://github.com/prometheus/prometheus/issues/3647

Signed-off-by: Bartek Plotka <bwplotka@gmail.com>
2018-12-18 11:26:36 +00:00
Alin Sinpalean 44bec482fb Minor optimization for BufferedSeriesIterator: actually drop the samples falling outside of the new delta from the underlying sampleRing, when ReduceDelta is called. (#4849)
Signed-off-by: Alin Sinpalean <alin.sinpalean@gmail.com>
2018-12-18 11:25:45 +00:00