* tsdb/agent: synchronize appender code with grafana/agent main
This commit synchronize the appender code with grafana/agent main. This
includes adding support for appending exemplars.
Closes#9610
Signed-off-by: Robert Fratto <robertfratto@gmail.com>
* tsdb/agent: fix build error
Signed-off-by: Robert Fratto <robertfratto@gmail.com>
* tsdb/agent: introduce some exemplar tests, refactor tests a little
Signed-off-by: Robert Fratto <robertfratto@gmail.com>
* tsdb/agent: address review feedback
- Re-use hash when creating a new series
- Fix typo in exemplar append error
Signed-off-by: Robert Fratto <robertfratto@gmail.com>
* tsdb/agent: remove unused AddFast method
Signed-off-by: Robert Fratto <robertfratto@gmail.com>
* tsdb/agent: close wal reader after test
Signed-off-by: Robert Fratto <robertfratto@gmail.com>
* tsdb/agent: add out-of-order tracking, change series TS in commit
Signed-off-by: Robert Fratto <robertfratto@gmail.com>
* address review feedback
Signed-off-by: Robert Fratto <robertfratto@gmail.com>
There was a subtle and nasty bug in listSeriesIterator.Seek.
In addition, the Seek call is defined to be a no-op if the current
position of the iterator is already pointing to a suitable
sample. This commit adds fast paths for this case to several
potentially expensive Seek calls.
Another bug was in concreteSeriesIterator.Seek. It always searched the
whole series and not from the current position of the iterator.
Signed-off-by: beorn7 <beorn@grafana.com>
- Pick At... method via return value of Next/Seek.
- Do not clobber returned buckets.
- Add partial FloatHistogram suppert.
Note that the promql package is now _only_ dealing with
FloatHistograms, following the idea that PromQL only knows float
values.
As a byproduct, I have removed the histogramSeries metric. In my
understanding, series can have both float and histogram samples, so
that metric doesn't make sense anymore.
As another byproduct, I have converged the sampleBuf and the
histogramSampleBuf in memSeries into one. The sample type stored in
the sampleBuf has been extended to also contain histograms even before
this commit.
Signed-off-by: beorn7 <beorn@grafana.com>
* Support appending different sample types to the same series
Signed-off-by: Ganesh Vernekar <ganeshvern@gmail.com>
* Fix comments
Signed-off-by: Ganesh Vernekar <ganeshvern@gmail.com>
* Fix build
Signed-off-by: Ganesh Vernekar <ganeshvern@gmail.com>
* Fix panic on WAL replay
Signed-off-by: Ganesh Vernekar <ganeshvern@gmail.com>
* Refactor: introduce walSubsetProcessor
walSubsetProcessor packages up the `processWALSamples()` function and
its input and output channels, helping to clarify how these things
relate.
Signed-off-by: Bryan Boreham <bjboreham@gmail.com>
* Refactor: extract more methods onto walSubsetProcessor
This makes the main logic easier to follow.
Signed-off-by: Bryan Boreham <bjboreham@gmail.com>
* Fix race warning by locking processWALSamples
Although we have waited for the processor to finish, we still get a
warning from the race detector because it doesn't know how the different
parts relate.
Add a lock round each batch of samples, so the race detector can see
that we never access series owned by the processor outside of a lock.
Signed-off-by: Bryan Boreham <bjboreham@gmail.com>
* Added test to reproduce issue 9859
Signed-off-by: Marco Pracucci <marco@pracucci.com>
* Remove redundant unit test
Signed-off-by: Ganesh Vernekar <ganeshvern@gmail.com>
* Fix out of order chunks during WAL replay
Signed-off-by: Ganesh Vernekar <ganeshvern@gmail.com>
* Fix nits
Signed-off-by: Ganesh Vernekar <ganeshvern@gmail.com>
Co-authored-by: Ganesh Vernekar <ganeshvern@gmail.com>
Co-authored-by: Marco Pracucci <marco@pracucci.com>
Added validation to expected postings length compared to the bytes slice
length. With 32bit postings, we expect to have 4 bytes per each posting.
If the number doesn't add up, we know that the input data is not
compatible with our code (maybe it's cut, or padded with trash, or even
written in a different coded).
This is needed in downstream projects to correctly identify cached
postings written with an unknown codec, but it's also a good idea to
validate it here.
Signed-off-by: Oleg Zaytsev <mail@olegzaytsev.com>
* Disable isolation in isolation struct
Signed-off-by: darshanime <deathbullet@gmail.com>
* Run tsdb tests with isolation disabled
Signed-off-by: darshanime <deathbullet@gmail.com>
* Check for isolation disabled in isoState.Close()
Signed-off-by: darshanime <deathbullet@gmail.com>
* use t.Skip to skip isolation tests when disabled
Signed-off-by: darshanime <deathbullet@gmail.com>
* address review comments
Signed-off-by: darshanime <deathbullet@gmail.com>
* fix test for defaultIsolationState
Signed-off-by: darshanime <deathbullet@gmail.com>
* Change flag name. Set flag in DB. Do not init txRing. Close isoState.
Signed-off-by: Ganesh Vernekar <ganeshvern@gmail.com>
* Test disabled isolation in CircleCI test_go
Signed-off-by: Ganesh Vernekar <ganeshvern@gmail.com>
* Skip isolation related tests in db_test.go
Signed-off-by: Ganesh Vernekar <ganeshvern@gmail.com>
Co-authored-by: Ganesh Vernekar <ganeshvern@gmail.com>
Calling `wal.NewSegmentBufReader()` without any segments would cause a
`panic` resulting in prometheus crashing. This patch fixes the panic by
making segmentBufReader return a EOF if there are not segments.
This also means an empty checkpoint directory which should never be the
case unless it has been tampered with (or has issues due to the
underlying filesystem e.g. NFS) would be ignored by Prometheus and would
continue to run instead of the current behaviour which is to panic.
Fixes: https://github.com/prometheus/prometheus/issues/9605
Signed-off-by: Sunil Thaha <sthaha@redhat.com>
* Add basic initial developer docs for TSDB
There's a decent amount of content already out there (blog posts,
conference talks, etc), but:
* when they get stale, they don't tend to get updated
* they still leave me with questions that I'ld like to answer
for developers (like me) who want to use, or work with, TSDB
What I propose is developer docs inside the prometheus
repository. Easy to find and harness the power of the community
to expand it and keep it up to date.
* perfect is the enemy of good. Let's have a base and incrementally improve
* Markdown docs should be broad but not too deep. Source code comments
can complement them, and are the ideal place for implementation details.
Signed-off-by: Dieter Plaetinck <dieter@grafana.com>
* use example code that works out of the box
Signed-off-by: Dieter Plaetinck <dieter@grafana.com>
* Apply suggestions from code review
Co-authored-by: Ganesh Vernekar <15064823+codesome@users.noreply.github.com>
Signed-off-by: Dieter Plaetinck <dieter@grafana.com>
* PR feedback
Signed-off-by: Dieter Plaetinck <dieter@grafana.com>
* more docs
Signed-off-by: Dieter Plaetinck <dieter@grafana.com>
* PR feedback
Signed-off-by: Dieter Plaetinck <dieter@grafana.com>
* Apply suggestions from code review
Signed-off-by: Dieter Plaetinck <dieter@grafana.com>
Co-authored-by: Bartlomiej Plotka <bwplotka@gmail.com>
* Apply suggestions from code review
Signed-off-by: Dieter Plaetinck <dieter@grafana.com>
Co-authored-by: Ganesh Vernekar <15064823+codesome@users.noreply.github.com>
* feedback
Signed-off-by: Dieter Plaetinck <dieter@grafana.com>
* Update tsdb/docs/usage.md
Signed-off-by: Dieter Plaetinck <dieter@grafana.com>
Co-authored-by: Ganesh Vernekar <15064823+codesome@users.noreply.github.com>
* final tweaks
Signed-off-by: Dieter Plaetinck <dieter@grafana.com>
* workaround docs versioning issue
Signed-off-by: Dieter Plaetinck <dieter@grafana.com>
* Move example code to real executable, testable example.
Signed-off-by: Dieter Plaetinck <dieter@grafana.com>
* cleanup example test and make sure it always reproduces
Signed-off-by: Dieter Plaetinck <dieter@grafana.com>
* obtain temp dir in a way that works with older Go versions
Signed-off-by: Dieter Plaetinck <dieter@grafana.com>
* Fix Ganesh's comments
Signed-off-by: Ganesh Vernekar <ganeshvern@gmail.com>
Co-authored-by: Ganesh Vernekar <15064823+codesome@users.noreply.github.com>
Co-authored-by: Bartlomiej Plotka <bwplotka@gmail.com>
Co-authored-by: Ganesh Vernekar <ganeshvern@gmail.com>
This is to avoid copying the many fields of a histogram.Histogram all
the time.
This also fixes a bunch of formerly broken tests.
Signed-off-by: beorn7 <beorn@grafana.com>
* share tsdb db locker code with agent
Closes#9616
Signed-off-by: Robert Fratto <robertfratto@gmail.com>
* add flag to disable lockfile for agent
Signed-off-by: Robert Fratto <robertfratto@gmail.com>
* use agentOnlySetting instead of PreAction
Signed-off-by: Robert Fratto <robertfratto@gmail.com>
* tsdb: address review feedback
1. Rename Locker to DirLocker
2. Move DirLocker to tsdb/tsdbutil
3. Name metric using fmt.Sprintf
4. Refine error checking in DirLocker test
Signed-off-by: Robert Fratto <robertfratto@gmail.com>
* tsdb: create test utilities to assert expected DirLocker behavior
Signed-off-by: Robert Fratto <robertfratto@gmail.com>
* tsdb/tsdbutil: fix lint errors
Signed-off-by: Robert Fratto <robertfratto@gmail.com>
* tsdb/agent: fix windows test failure
Use new DB variable instead of overriding the old one.
Signed-off-by: Robert Fratto <robertfratto@gmail.com>
* Add more size checks when writing individual sections in the index.
Signed-off-by: Peter Štibraný <pstibrany@gmail.com>
* Use uint and add comment about it.
Signed-off-by: Peter Štibraný <pstibrany@gmail.com>
* Close agent db in tests
Signed-off-by: Levi Harrison <git@leviharrison.dev>
* Close first DB before opening second
Signed-off-by: Levi Harrison <git@leviharrison.dev>
* Use seperate variables for different DBs?
Signed-off-by: Levi Harrison <git@leviharrison.dev>
* Close remote storage
Signed-off-by: Julien Pivotto <roidelapluie@inuits.eu>
* Fix closing of stuff
Signed-off-by: Ganesh Vernekar <ganeshvern@gmail.com>
* Remove the build flags after a rebase
Signed-off-by: Ganesh Vernekar <ganeshvern@gmail.com>
* Fix closing of stuff 2
Signed-off-by: Ganesh Vernekar <ganeshvern@gmail.com>
Co-authored-by: Julien Pivotto <roidelapluie@inuits.eu>
Co-authored-by: Ganesh Vernekar <ganeshvern@gmail.com>
It seems sometimes you can get error like:
Error: Not equal:
expected: []byte(nil)
actual : []byte{}
Diff:
--- Expected
+++ Actual
@@ -1,2 +1,3 @@
-([]uint8) <nil>
+([]uint8) {
+}
This commit does what bytes.Equal does to silence those differences. I'm
not sure if this is a correct solution or just covering up the actual bug.
Closes#9574
Signed-off-by: Mateusz Gozdek <mgozdekof@gmail.com>
This creates a new `model` directory and moves all data-model related
packages over there:
exemplar labels relabel rulefmt textparse timestamp value
All the others are more or less utilities and have been moved to `util`:
gate logging modetimevfs pool runtime
Signed-off-by: beorn7 <beorn@grafana.com>
* TSDB: demistify seriesRefs and ChunkRefs
The TSDB package contains many types of series and chunk references,
all shrouded in uint types. Often the same uint value may
actually mean one of different types, in non-obvious ways.
This PR aims to clarify the code and help navigating to relevant docs,
usage, etc much quicker.
Concretely:
* Use appropriately named types and document their semantics and
relations.
* Make multiplexing and demuxing of types explicit
(on the boundaries between concrete implementations and generic
interfaces).
* Casting between different types should be free. None of the changes
should have any impact on how the code runs.
TODO: Implement BlockSeriesRef where appropriate (for a future PR)
Signed-off-by: Dieter Plaetinck <dieter@grafana.com>
* feedback
Signed-off-by: Dieter Plaetinck <dieter@grafana.com>
* agent: demistify seriesRefs and ChunkRefs
Signed-off-by: Dieter Plaetinck <dieter@grafana.com>
* Allow to disable trimming when querying TSDB
Signed-off-by: Marco Pracucci <marco@pracucci.com>
* Addressed review comments
Signed-off-by: Marco Pracucci <marco@pracucci.com>
* Added unit test
Signed-off-by: Marco Pracucci <marco@pracucci.com>
* Renamed TrimDisabled to DisableTrimming
Signed-off-by: Marco Pracucci <marco@pracucci.com>
We are aware of the issue, but while we are working on it,
having main tests broken is an annoyance.
Signed-off-by: Julien Pivotto <roidelapluie@inuits.eu>
* Initial draft of prometheus-agent
This commit introduces a new binary, prometheus-agent, based on the
Grafana Agent code. It runs a WAL-only version of prometheus without the
TSDB, alerting, or rule evaluations. It is intended to be used to
remote_write to Prometheus or another remote_write receiver.
By default, prometheus-agent will listen on port 9095 to not collide
with the prometheus default of 9090.
Truncation of the WAL cooperates on a best-effort case with Remote
Write. Every time the WAL is truncated, the minimum timestamp of data to
truncate is determined by the lowest sent timestamp of all samples
across all remote_write endpoints. This gives loose guarantees that data
from the WAL will not try to be removed until the maximum sample
lifetime passes or remote_write starts functionining.
Signed-off-by: Robert Fratto <robertfratto@gmail.com>
* add tests for Prometheus agent (#22)
* add tests for Prometheus agent
* add tests for Prometheus agent
* rearranged tests as per the review comments
* update tests for Agent
* changes as per code review comments
Signed-off-by: SriKrishna Paparaju <paparaju@gmail.com>
* incremental changes to prometheus agent
Signed-off-by: SriKrishna Paparaju <paparaju@gmail.com>
* changes as per code review comments
Signed-off-by: SriKrishna Paparaju <paparaju@gmail.com>
* Commit feedback from code review
Co-authored-by: Bartlomiej Plotka <bwplotka@gmail.com>
Co-authored-by: Ganesh Vernekar <ganeshvern@gmail.com>
Signed-off-by: Robert Fratto <robertfratto@gmail.com>
* Port over some comments from grafana/agent
Signed-off-by: Robert Fratto <robertfratto@gmail.com>
* Rename agent.Storage to agent.DB for tsdb consistency
Signed-off-by: Robert Fratto <robertfratto@gmail.com>
* Consolidate agentMode ifs in cmd/prometheus/main.go
Signed-off-by: Robert Fratto <robertfratto@gmail.com>
* Document PreAction usage requirements better for agent mode flags
Signed-off-by: Robert Fratto <robertfratto@gmail.com>
* remove unnecessary defaultListenAddr
Signed-off-by: Robert Fratto <robertfratto@gmail.com>
* `go fmt ./tsdb/agent` and fix lint errors
Signed-off-by: Robert Fratto <robertfratto@gmail.com>
Co-authored-by: SriKrishna Paparaju <paparaju@gmail.com>
