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feat(converters): Support converting Promtail limits_config#5777

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ptodev/promtail-limits
Mar 16, 2026
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feat(converters): Support converting Promtail limits_config#5777
ptodev merged 2 commits into
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ptodev/promtail-limits

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@ptodev ptodev commented Mar 12, 2026

Pull Request Details

Promtail's limits config does not have a direct equivalent in Alloy. We need to use various different features. There's also one config argument (max_streams) for which I can't find an Alloy equivalent.

Issue(s) fixed by this Pull Request

Fixes #3039

Notes to the Reviewer

PR Checklist

  • Documentation added
  • Tests updated
  • Config converters updated

@ptodev ptodev requested a review from a team as a code owner March 12, 2026 12:26
@kalleep
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kalleep commented Mar 12, 2026

max_streams

We have this one on loki.write https://grafana.com/docs/alloy/latest/reference/components/loki/loki.write/#arguments

@ptodev ptodev force-pushed the ptodev/promtail-limits branch from da627eb to 3316006 Compare March 16, 2026 10:22
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ptodev commented Mar 16, 2026

@kalleep thanks for letting me know! I updated the PR to add support for this too.

@ptodev ptodev merged commit 9491385 into main Mar 16, 2026
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@ptodev ptodev deleted the ptodev/promtail-limits branch March 16, 2026 11:15
@grafana-alloybot grafana-alloybot Bot mentioned this pull request Mar 16, 2026
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blewis12 pushed a commit that referenced this pull request Mar 30, 2026
@grafana-alloybot
chore(main): Release 1.15.0 (#5170)
4368902 
🤖 I have created a release *beep* *boop*
---


## [1.15.0](v1.14.0...v1.15.0)
(2026-03-26)


### ⚠ BREAKING CHANGES

* **otelcol:** Upgrade to OTel Collector v0.147.0
([#5784](#5784))
* Renamed undocumented metrics that was previously prefixed with
<component_id>_<metric_name> to loki_source_awsfirehose_<metric_name>

### Features 🌟

* **alloy-mixin:** Add filters, groupBy, and multi-select dashboard
variables ([#5611](#5611))
([3ef714e](3ef714e))
* **beyla.ebpf:** Add support for Prometheus native histograms
([#5812](#5812))
([7d806fb](7d806fb))
* **beyla.ebpf:** Bump Beyla to v3.6
([#5833](#5833))
([cd878d5](cd878d5))
* **converters:** Support converting Promtail limits_config
([#5777](#5777))
([9491385](9491385))
* **database_observability.mysql:** Add filtering of query samples and
wait events by minimum duration
([#5678](#5678))
([5a4d03b](5a4d03b))
* **database_observability.mysql:** Embed prometheus exporter within
db-o11y component
([#5711](#5711))
([88bffb0](88bffb0))
* **database_observability.postgres:** Add configurable limit to
`pg_stat_statements` query
([#5639](#5639))
([0de0a3f](0de0a3f))
* **database_observability.postgres:** Embed prometheus exporter within
db-o11y component
([#5714](#5714))
([9dc2e83](9dc2e83))
* **database_observability:** Add scaffolding for db-o11y integration
tests ([#5575](#5575))
([ca637d8](ca637d8))
* **database_observability:** Promote components to stable
([#5736](#5736))
([21a9af6](21a9af6))
* Expose Functionality to Handle syslogs with Empty MSG Field
([#5687](#5687))
([178b1e6](178b1e6))
* **helm:** Allow setting `revisionHistoryLimit` in the helm chart
([#5847](#5847))
([9713ad4](9713ad4))
* **loki.process:** Support structured metadata as source type of
stage.labels for loki.process
([#5055](#5055))
([eda3152](eda3152))
* **loki.secretfilter:** Add sampling for secretfilter entries
([#5663](#5663))
([9997802](9997802))
* **loki.source.gcplog:** Add alloy config for MaxOutstandingBytes and
MaxOutstandingMessages
([#5760](#5760))
([c2b9f0b](c2b9f0b))
* **loki.write:** Add loki pipeline latency metric
([#5702](#5702))
([cc744a1](cc744a1))
* **mixin:** Update loki dashboard
([#5848](#5848))
([b616d58](b616d58))
* **otelcol.receiver.datadog:** Expose intake proxy and
trace_id_cache_size settings
([#5776](#5776))
([0384ad4](0384ad4))
* **otelcol:** Upgrade to OTel Collector v0.147.0
([#5784](#5784))
([a9b5396](a9b5396))
* **prometheus.exporter.cloudwatch:** Use aws-sdk-go-v2 by default
([#5768](#5768))
([a2f3489](a2f3489))
* **pyroscope.ebpf:** Add comm, pid labels and kernel frame options
([#5769](#5769))
([4fa7068](4fa7068))
* **pyroscope.ebpf:** Expose OTel eBPF profiler internal metrics to
Prometheus ([#5774](#5774))
([e713392](e713392))
* **pyroscope:** Copy prometheus common/config HTTP client into
promhttp2 package
([#5810](#5810))
([0b31aaa](0b31aaa))


### Bug Fixes 🐛

* **beyla:** Inject Beyla version into binary via ldflags
([#5735](#5735))
([71c03ec](71c03ec))
* Correctly handle the deprecated topic field in otelcol.receiver.kafka
configuration ([#5726](#5726))
([538ac75](538ac75))
* **database_observability.mysql:** Ensure result sets are properly
closed ([#5893](#5893))
([f28f91c](f28f91c))
* **database_observability:** Ensure all collectors are properly stopped
([#5796](#5796))
([6bfa2a7](6bfa2a7))
* **database_observability:** Ensure that `connection_info` metric is
only emitted for a given DB instance when it is available
([#5707](#5707))
([bf0c3dc](bf0c3dc))
* **database_observability:** Solve test flakiness in MySQL and Postgres
sample collectors
([#5130](#5130))
([a7590d1](a7590d1))
* **deps:** Update module github.com/buger/jsonparser to v1.1.2
[SECURITY] ([#5834](#5834))
([b2fee8a](b2fee8a))
* **deps:** Update module github.com/buger/jsonparser to v1.1.2
[SECURITY] ([#5870](#5870))
([698b4e7](698b4e7))
* **deps:** Update module google.golang.org/grpc to v1.79.3 [SECURITY]
([#5825](#5825))
([5cfbcc4](5cfbcc4))
* **deps:** Update module google.golang.org/grpc to v1.79.3 [SECURITY]
([#5871](#5871))
([259152d](259152d))
* **deps:** Update npm dependencies
([#5876](#5876))
([f0f6a11](f0f6a11))
* **deps:** Update npm deps across repo to address CVE-2026-26996 and
CVE-2026-22029 ([#5872](#5872))
([df518dd](df518dd))
* **go:** Update build image to go v1.25.8
([#5832](#5832))
([f9b3043](f9b3043))
* **go:** Update go to 1.25.8
([#5844](#5844))
([534e7db](534e7db))
* Helm: alloy.extraPorts not working with service.type=NodePort [COPY]
([#5892](#5892))
([162c6f7](162c6f7))
* **loki.enrich:** Use shared loki functions and fix locking
([#5821](#5821))
([f916c72](f916c72))
* **loki.process:** Multiline no longer pass empty entry if start was
flushed ([#5746](#5746))
([7bdedf1](7bdedf1))
* **loki.process:** Protect against json that does not look like docker
json format ([#5761](#5761))
([0af6eaa](0af6eaa))
* **loki.secretfilter:** Fix bug where entries were being shadow dropped
([#5786](#5786))
([90243f9](90243f9))
* **loki.source.file:** Fix position tracking when component stops
([#5800](#5800))
([9762946](9762946))
* **loki.source.file:** Keep positions for compressed files when reading
is finished ([#5723](#5723))
([fb41d0a](fb41d0a))
* **loki.source.gcplog:** Update to pubsub v2 and fix shutdown semantics
([#5713](#5713))
([e9d9b69](e9d9b69))
* **loki.source.heroku:** Fix shutdown semantics and consume logs in
batches ([#5804](#5804))
([deda452](deda452))
* **loki.write:** Remove noisy log
([#5837](#5837))
([8e28f35](8e28f35))
* **loki:** Make drain forward entries with fallback timeout
([#5830](#5830))
([cfbca90](cfbca90))
* **prometheus.scrape:** Update arguments and targets even if
`scrape_native_histograms` and `extra_metrics` are updated
([#5787](#5787))
([dc4cb0a](dc4cb0a))
* **pyroscope.ebpf:** Update opentelemetry-ebpf-profiler
([#5904](#5904))
([dfaec47](dfaec47))
* Stop components in a deterministic order
([#5613](#5613))
([00cd371](00cd371))


### Chores

* Use shared source structures for aws firehose
([#5739](#5739))
([aef19dc](aef19dc))

---
This PR was generated with [Release
Please](https://github.com/googleapis/release-please). See
[documentation](https://github.com/googleapis/release-please#release-please).

Co-authored-by: grafana-alloybot[bot] <167359181+grafana-alloybot[bot]@users.noreply.github.com>
@BrewTestBot BrewTestBot mentioned this pull request Mar 30, 2026
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Default Values and Configuration for limits_config in Alloy Missing After Conversion from Promtail

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@ptodev @kalleep