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This PR changes `DefaultExemplarReservoirProviderSelector` in
`go.opentelemetry.io/otel/sdk/metric` to use `runtime.GOMAXPROCS(0)`
instead of `runtime.NumCPU()` for the `FixedSizeReservoirProvider`
default size.
**Motivation**
The [runtime.NumCPU](https://pkg.go.dev/runtime#NumCPU) returns the
number of logical CPUs usable by the current process. In Kubernetes, the
method will return the total number of cores on the node, not the actual
number of cores available to the container. Since it is common practice
to allocate only a small fraction of the total CPU on a node to a
container, the current implementation may result in an excessive
`FixedSizeReservoir` size, which in turn negatively impacts the
resources consumed.
---------
Co-authored-by: Tyler Yahn <MrAlias@users.noreply.github.com>
Co-authored-by: Tyler Yahn <codingalias@gmail.com>
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|
[google.golang.org/genproto/googleapis/rpc](https://redirect.github.com/googleapis/go-genproto)
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This PR contains the following updates:
| Package | Change | Age | Confidence |
|---|---|---|---|
|
[github.com/golangci/golangci-lint/v2](https://redirect.github.com/golangci/golangci-lint)
| `v2.2.2` -> `v2.3.0` |
[](https://docs.renovatebot.com/merge-confidence/)
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[`v2.3.0`](https://redirect.github.com/golangci/golangci-lint/blob/HEAD/CHANGELOG.md#v230)
[Compare
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1. Linters new features or changes
- `ginkgolinter`: from 0.19.1 to 0.20.0 (new option:
`force-assertion-description`)
- `iface`: from 1.4.0 to 1.4.1 (report message improvements)
- `noctx`: from 0.3.4 to 0.3.5 (new detections: `log/slog`, `exec`,
`crypto/tls`)
- `revive`: from 1.10.0 to 1.11.0 (new rule: `enforce-switch-style`)
- `wsl`: from 5.0.0 to 5.1.0
2. Linters bug fixes
- `gosec`: from 2.22.5 to 2.22.6
- `noinlineerr`: from 1.0.4 to 1.0.5
- `sloglint`: from 0.11.0 to 0.11.1
3. Misc.
- fix: panic close of closed channel
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#### 3.29.3 - 21 Jul 2025
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This PR contains the following updates:
| Package | Type | Update | Change |
|---|---|---|---|
|
[google.golang.org/genproto/googleapis/api](https://redirect.github.com/googleapis/go-genproto)
| indirect | digest | `7130f93` -> `a45f3df` |
|
[google.golang.org/genproto/googleapis/rpc](https://redirect.github.com/googleapis/go-genproto)
| indirect | digest | `7130f93` -> `a45f3df` |
|
[google.golang.org/genproto/googleapis/rpc](https://redirect.github.com/googleapis/go-genproto)
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Patch release for
https://github.com/open-telemetry/opentelemetry-go/issues/7039
### Changed
- Retract `v0.59.0` release of
`go.opentelemetry.io/otel/exporters/prometheus` module which appends
incorrect unit suffixes. (#7046)
- Change `go.opentelemetry.io/otel/exporters/prometheus` to no longer
deduplicate suffixes when UTF8 is enabled.
It is recommended to disable unit and counter suffixes in the exporter,
and manually add suffixes if you rely on the existing behavior. (#7044)
### Fixed
- Fix `go.opentelemetry.io/otel/exporters/prometheus` to properly handle
unit suffixes when the unit is in brackets.
E.g. `{spans}`. (#7044)
Fixes https://github.com/open-telemetry/opentelemetry-go/issues/7039
Fixes https://github.com/open-telemetry/opentelemetry-go/issues/6704
This uses the common prometheus/otlptranslator library to handle name
conversion. It was a little tricky to work around the fact that the
library only lets us configure whether all suffixes are added or not.
But we want to keep supporting WithoutUnit and WithoutCounterSuffixes
for a while longer. Those will eventually be deprecated and replaced
after
https://github.com/open-telemetry/opentelemetry-specification/pull/4533
is released.
We decided to go ahead with the changes despite it being a small
behavioral change when UTF8 is enabled. See:
https://github.com/prometheus/otlptranslator/issues/44 for the
rationale.
This adds a unit test to verify that it properly handles bracketed
units. The test fails on main with:
```
--- FAIL: TestPrometheusExporter (0.01s)
--- FAIL: TestPrometheusExporter/counter_with_bracketed_unit (0.00s)
exporter_test.go:646:
Error Trace: /usr/local/google/home/dashpole/go/src/go.opentelemetry.io/opentelemetry-go/exporters/prometheus/exporter_test.go:646
Error: Received unexpected error:
-# HELP "foo_{spans}_total" a simple counter
-# TYPE "foo_{spans}_total" counter
-{"foo_{spans}_total",A="B",C="D",E="true",F="42",otel_scope_fizz="buzz",otel_scope_name="testmeter",otel_scope_schema_url="",otel_scope_version="v0.1.0"} 24.3
-{"foo_{spans}_total",A="D",C="B",E="true",F="42",otel_scope_fizz="buzz",otel_scope_name="testmeter",otel_scope_schema_url="",otel_scope_version="v0.1.0"} 5
+# HELP foo_total a simple counter
+# TYPE foo_total counter
+foo_total{A="B",C="D",E="true",F="42",otel_scope_fizz="buzz",otel_scope_name="testmeter",otel_scope_schema_url="",otel_scope_version="v0.1.0"} 24.3
+foo_total{A="D",C="B",E="true",F="42",otel_scope_fizz="buzz",otel_scope_name="testmeter",otel_scope_schema_url="",otel_scope_version="v0.1.0"} 5
# HELP target_info Target metadata
# TYPE target_info gauge
target_info{"service.name"="prometheus_test","telemetry.sdk.language"="go","telemetry.sdk.name"="opentelemetry","telemetry.sdk.version"="latest"} 1
Test: TestPrometheusExporter/counter_with_bracketed_unit
2025/07/18 15:07:47 internal_logging.go:50: "msg"="Using existing type definition." "error"="instrument type conflict" "instrument"="foo_total" "existing"="COUNTER" "dropped"="GAUGE"
2025/07/18 15:07:47 internal_logging.go:50: "msg"="Using existing type definition." "error"="instrument type conflict" "instrument"="foo_bytes" "existing"="GAUGE" "dropped"="HISTOGRAM"
FAIL
FAIL go.opentelemetry.io/otel/exporters/prometheus 0.054s
FAIL
```
cc @TylerHelmuth @ywwg @ArthurSens
---------
Co-authored-by: Tyler Yahn <MrAlias@users.noreply.github.com>
Co-authored-by: Robert Pająk <pellared@hotmail.com>
Fixes#6976
Towards #6887
## What
- A new configuration field for cardinality limits is added to the SDK.
- Users can set cardinality limits via code
- Default value of 0(no limit) is applied if no value is provided.
- Unit tests validate the configuration behavior.
## Additional
- Issue created regarding the missing environment variable for the
cardinality limit:
[opentelemetry-specification#4586](https://github.com/open-telemetry/opentelemetry-specification/issues/4586)
---------
Co-authored-by: Robert Pająk <pellared@hotmail.com>
Co-authored-by: Damien Mathieu <42@dmathieu.com>
Co-authored-by: Cijo Thomas <cithomas@microsoft.com>
Co-authored-by: Tyler Yahn <MrAlias@users.noreply.github.com>
This PR contains the following updates:
| Package | Type | Update | Change |
|---|---|---|---|
| golang.org/x/exp | require | digest | `542afb5` -> `645b1fa` |
| golang.org/x/exp/typeparams | indirect | digest | `542afb5` ->
`645b1fa` |
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This PR contains the following updates:
| Package | Type | Update | Change |
|---|---|---|---|
| golang.org/x/exp | require | digest | `6ae5c78` -> `542afb5` |
| golang.org/x/exp/typeparams | indirect | digest | `6ae5c78` ->
`542afb5` |
---
> [!WARNING]
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Dashboard for more information.
---
### Configuration
📅 **Schedule**: Branch creation - At any time (no schedule defined),
Automerge - At any time (no schedule defined).
🚦 **Automerge**: Disabled by config. Please merge this manually once you
are satisfied.
♻ **Rebasing**: Whenever PR is behind base branch, or you tick the
rebase/retry checkbox.
🔕 **Ignore**: Close this PR and you won't be reminded about these
updates again.
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View the [repository job
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