Automatically set GOMAXPROCS to match Linux container CPU quota (#5000)

Signed-off-by: Zbynek Roubalik <zroubalik@gmail.com>

CHANGELOG.md

@@ -65,6 +65,7 @@ Here is an overview of all new **experimental** features:
 - **General**: Add ScaledObject/ScaledJob names to output of `kubectl get triggerauthentication/clustertriggerauthentication` ([#796](https://github.com/kedacore/keda/issues/796))
 - **General**: Add standalone CRD generation to release workflow ([#2726](https://github.com/kedacore/keda/issues/2726))
 - **General**: Adding a changelog validating script to check for formatting and order ([#3190](https://github.com/kedacore/keda/issues/3190))
+- **General**: Automatically set `GOMAXPROCS` to match Linux container CPU quota ([#4999](https://github.com/kedacore/keda/issues/4999))
 - **General**: Emit more Kubernetes events about internal state and scaling ([#3764](https://github.com/kedacore/keda/issues/3764))
 - **General**: Introduce annotation `autoscaling.keda.sh/paused: true` for ScaledObject to pause autoscaling ([#3304](https://github.com/kedacore/keda/issues/3304))
 - **General**: Updated AWS SDK and updated all the aws scalers ([#4905](https://github.com/kedacore/keda/issues/4905))

cmd/adapter/main.go

@@ -24,6 +24,7 @@ import (
 	"os"
 
 	"github.com/prometheus/client_golang/prometheus/collectors"
+	_ "go.uber.org/automaxprocs"
 	appsv1 "k8s.io/api/apps/v1"
 	apimetrics "k8s.io/apiserver/pkg/endpoints/metrics"
 	"k8s.io/client-go/kubernetes/scheme"

cmd/operator/main.go

@@ -22,6 +22,7 @@ import (
 	"time"
 
 	"github.com/spf13/pflag"
+	_ "go.uber.org/automaxprocs"
 	apimachineryruntime "k8s.io/apimachinery/pkg/runtime"
 	utilruntime "k8s.io/apimachinery/pkg/util/runtime"
 	kubeinformers "k8s.io/client-go/informers"

cmd/webhooks/main.go

@@ -22,6 +22,7 @@ import (
 	"os"
 
 	"github.com/spf13/pflag"
+	_ "go.uber.org/automaxprocs"
 	apimachineryruntime "k8s.io/apimachinery/pkg/runtime"
 	utilruntime "k8s.io/apimachinery/pkg/util/runtime"
 	clientgoscheme "k8s.io/client-go/kubernetes/scheme"

go.mod

@@ -299,6 +299,7 @@ require (
 	go.opentelemetry.io/proto/otlp v0.19.0 // indirect
 	go.starlark.net v0.0.0-20200306205701-8dd3e2ee1dd5 // indirect
 	go.uber.org/atomic v1.11.0 // indirect
+	go.uber.org/automaxprocs v1.5.3
 	go.uber.org/multierr v1.11.0 // indirect
 	go.uber.org/zap v1.26.0 // indirect
 	golang.org/x/crypto v0.13.0 // indirect

go.sum

@@ -743,6 +743,7 @@ github.com/pkg/sftp v1.10.1/go.mod h1:lYOWFsE0bwd1+KfKJaKeuokY15vzFx25BLbzYYoAxZ
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/posener/complete v1.1.1/go.mod h1:em0nMJCgc9GFtwrmVmEMR/ZL6WyhyjMBndrE9hABlRI=
+github.com/prashantv/gostub v1.1.0 h1:BTyx3RfQjRHnUWaGF9oQos79AlQ5k8WNktv7VGvVH4g=
 github.com/prometheus/client_golang v0.9.1/go.mod h1:7SWBe2y4D6OKWSNQJUaRYU/AaXPKyh/dDVn+NZz0KFw=
 github.com/prometheus/client_golang v0.9.3/go.mod h1:/TN21ttK/J9q6uSwhBd54HahCDft0ttaMvbicHlPoso=
 github.com/prometheus/client_golang v1.16.0 h1:yk/hx9hDbrGHovbci4BY+pRMfSuuat626eFsHb7tmT8=
@@ -941,6 +942,8 @@ go.uber.org/atomic v1.4.0/go.mod h1:gD2HeocX3+yG+ygLZcrzQJaqmWj9AIm7n08wl/qW/PE=
 go.uber.org/atomic v1.7.0/go.mod h1:fEN4uk6kAWBTFdckzkM89CLk9XfWZrxpCo0nPH17wJc=
 go.uber.org/atomic v1.11.0 h1:ZvwS0R+56ePWxUNi+Atn9dWONBPp/AUETXlHW0DxSjE=
 go.uber.org/atomic v1.11.0/go.mod h1:LUxbIzbOniOlMKjJjyPfpl4v+PKK2cNJn91OQbhoJI0=
+go.uber.org/automaxprocs v1.5.3 h1:kWazyxZUrS3Gs4qUpbwo5kEIMGe/DAvi5Z4tl2NW4j8=
+go.uber.org/automaxprocs v1.5.3/go.mod h1:eRbA25aqJrxAbsLO0xy5jVwPt7FQnRgjW+efnwa1WM0=
 go.uber.org/goleak v1.1.11/go.mod h1:cwTWslyiVhfpKIDGSZEM2HlOvcqm+tG4zioyIeLoqMQ=
 go.uber.org/goleak v1.2.1 h1:NBol2c7O1ZokfZ0LEU9K6Whx/KnwvepVetCUhtKja4A=
 go.uber.org/goleak v1.2.1/go.mod h1:qlT2yGI9QafXHhZZLxlSuNsMw3FFLxBr+tBRlmO1xH4=