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Add remote write protocol 2.0 support #9072

Open
Tracked by #7817
dimitarvdimitrov opened this issue Aug 22, 2024 · 3 comments
Open
Tracked by #7817

Add remote write protocol 2.0 support #9072

dimitarvdimitrov opened this issue Aug 22, 2024 · 3 comments
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@aknuds1
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component/distributor component/ingester enhancement New feature or request

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@dimitarvdimitrov
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dimitarvdimitrov commented Aug 22, 2024 •
edited by armandgrillet
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What should we do?

Prometheus added remote write protocol 2.0 experimental support in v2.54.0 (released on 2024-08-09). We should add the support in Mimir too.

How will we do it (roughly)?

  • Add remote write 2.0 support in Mimir distributors
  • Backport all (applicable) optimizations we did to remote write 1.0 (un)marshalling
  • Compare performance between remote write 1.0 and 2.0
  • Allow to enable 2.0 support on a per-tenant basis

Private design doc: https://docs.google.com/document/d/1JSwhdWRODOeGlNIRpYvnEHK6aH7d42n4ZJ_rfFvt-Lo/edit?tab=t.0#heading=h.5sybau7waq2q

Out of the scope of this work:

  • Change data format between distributors and ingesters / Kafka (keep using protocol 1.0 format). This should be a follow up deliverable.

Size?

Between Medium (= ~1 month) and Large (= ~3 month).

What will we deliver?

  • Add remote write 2.0 experimental support in Mimir, fully merged in Mimir but disabled by default
  • Test remote write 2.0 in dev

What are the documentation dependencies?

  • No documentation changes to docs until enabled by default

Urgency?

Not urgent yet, but we can't lag too much behind Prometheus
@pstibrany pstibrany mentioned this issue Aug 22, 2024
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@jmichalek132
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FYI otel collector contrib has lfx mentorship project starting in September to add support in the remote write exporter for remote write 2.0. Tracking issue: open-telemetry/opentelemetry-collector-contrib#33661.

@krajorama krajorama mentioned this issue Jan 6, 2025
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@krajorama
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This is becoming a bit more urgent now due to two projects depending on it: native histograms with custom buckets (NHCB) and proper handling of OTLP created timestamp (current solution we don't want to upstream because it's a bit of a workaround).

This was referenced Jan 9, 2025
Merged
Merged
krajorama added a commit to prometheus/prometheus that referenced this issue Jan 14, 2025
@krajorama
fix(remotewrite2): do not overwrite help text with unit in enqueue
594b882 
While testing POC for grafana/mimir#9072
I saw no unit or help metadata. Our test env:
https://github.com/grafana/mimir/tree/main/development/mimir-monolithic-mode
doesn't have units, so that was empty and cleared the help due to this bug.

Signed-off-by: György Krajcsovits <[email protected]>
@krajorama krajorama mentioned this issue Jan 14, 2025
Merged
krajorama added a commit to prometheus/prometheus that referenced this issue Jan 15, 2025
@krajorama
fix(remotewrite2): do not send uninitialized garbage if there's no me…
482a7fd 
…tadata

Found during testing for
grafana/mimir#9072

Debug printout showed:
KRAJO: seriesName=cortex_request_duration_seconds_bucket,
metricFamily=cortex_request_duration_seconds_bucket,
type=GAUGE,
help=cortex_bucket_index_load_duration_seconds_sum,
unit=

which is nonsense.

I can imagine more cases where this is the case and makes actual sense.
Some targets might miss metadata and if there's a pipeline that loses it.

Signed-off-by: György Krajcsovits <[email protected]>
This was referenced Jan 15, 2025
Merged
Draft
krajorama added a commit that referenced this issue Jan 16, 2025
@krajorama
refactor(mimirpb): delete TestRemoteWriteV1HistogramEquivalence
267c7e0 
As far as I can tell we don't cast Prometheus Remote Write 1.0
histogram into mimirpb.Histogram anymore. On the flip-side
this test fails in #10432 because we're going to store RW 2.0
extra field in mimirpb.Histogram.

Related to #9072

Signed-off-by: György Krajcsovits <[email protected]>
@krajorama krajorama mentioned this issue Jan 16, 2025
Merged
krajorama added a commit that referenced this issue Jan 16, 2025
@krajorama
refactor(mimirpb): delete TestRemoteWriteV1HistogramEquivalence
a864aa3 
As far as I can tell we don't cast Prometheus Remote Write 1.0
histogram into mimirpb.Histogram anymore. On the flip-side
this test fails in #10432 because we're going to store RW 2.0
extra field in mimirpb.Histogram.

Related to #9072

Signed-off-by: György Krajcsovits <[email protected]>
@krajorama
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Based on #10432

Task list:

  • Remove/refactor debug statements in PreallocWriteRequest.unmarshalRW2
  • Add unit test for PreallocWriteRequest.unmarshalRW2
  • Add benchmark test for PreallocWriteRequest.unmarshalRW2
  • Add configuration option to enable/disable RW2.0 support. If disabled it should return 415 as in fix(rw2.0): reject remote write 2.0 based on content type #10423
  • Add metric to measure which protocol is in use
  • Add more testcases to TestDistributorRemoteWrite2 integration test
  • Patch mimir.pb.go to ignore RW2 only fields when unmarshal RW1
  • Add Changelog entry
  • Run Prometheus tool that checks compatibility against out endpoint if possible
  • Performance test with avalanche

Vandit1604 pushed a commit to Vandit1604/prometheus that referenced this issue Jan 16, 2025
@krajorama @Vandit1604
fix(remotewrite2): do not overwrite help text with unit in enqueue
ba76432 
While testing POC for grafana/mimir#9072
I saw no unit or help metadata. Our test env:
https://github.com/grafana/mimir/tree/main/development/mimir-monolithic-mode
doesn't have units, so that was empty and cleared the help due to this bug.

Signed-off-by: György Krajcsovits <[email protected]>
Vandit1604 pushed a commit to Vandit1604/prometheus that referenced this issue Jan 16, 2025
@krajorama @Vandit1604
fix(remotewrite2): do not send uninitialized garbage if there's no me…
e02237f 
…tadata

Found during testing for
grafana/mimir#9072

Debug printout showed:
KRAJO: seriesName=cortex_request_duration_seconds_bucket,
metricFamily=cortex_request_duration_seconds_bucket,
type=GAUGE,
help=cortex_bucket_index_load_duration_seconds_sum,
unit=

which is nonsense.

I can imagine more cases where this is the case and makes actual sense.
Some targets might miss metadata and if there's a pipeline that loses it.

Signed-off-by: György Krajcsovits <[email protected]>
krajorama added a commit that referenced this issue Jan 17, 2025
@krajorama
refactor(mimirpb): delete TestRemoteWriteV1HistogramEquivalence (#10450)
504dd37 
As far as I can tell we don't cast Prometheus Remote Write 1.0
histogram into mimirpb.Histogram anymore. On the flip-side
this test fails in #10432 because we're going to store RW 2.0
extra field in mimirpb.Histogram.

Related to #9072

Signed-off-by: György Krajcsovits <[email protected]>
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@aknuds1 @jmichalek132 @krajorama @dimitarvdimitrov