chore: use Linux container CPU quota

Go is not cgroup aware and by default will set GOMAXPROCS to the number
of available threads, regardless of whether it is within the allocated
quota. This behaviour causes high amount of CPU throttling and degraded
application performance.

Fixes: #584

Author: uhthomas

collector/cmd/collector-metrics/collector-metrics.go

@@ -17,6 +17,7 @@ import (
 	utils "github.com/analogj/go-util/utils"
 	"github.com/fatih/color"
 	"github.com/urfave/cli/v2"
+	_ "go.uber.org/automaxprocs"
 )
 
 var goos string
@@ -37,8 +38,8 @@ func main() {
 	}
 
 	//we're going to load the config file manually, since we need to validate it.
-	err = config.ReadConfig(configFilePath) // Find and read the config file
-	if _, ok := err.(errors.ConfigFileMissingError); ok {          // Handle errors reading the config file
+	err = config.ReadConfig(configFilePath)               // Find and read the config file
+	if _, ok := err.(errors.ConfigFileMissingError); ok { // Handle errors reading the config file
 		//ignore "could not find config file"
 	} else if err != nil {
 		os.Exit(1)

collector/cmd/collector-selftest/collector-selftest.go

@@ -13,6 +13,7 @@ import (
 	utils "github.com/analogj/go-util/utils"
 	"github.com/fatih/color"
 	"github.com/urfave/cli/v2"
+	_ "go.uber.org/automaxprocs"
 )
 
 var goos string

go.mod

@@ -18,6 +18,7 @@ require (
 	github.com/spf13/viper v1.14.0
 	github.com/stretchr/testify v1.8.1
 	github.com/urfave/cli/v2 v2.2.0
+	go.uber.org/automaxprocs v1.5.3
 	golang.org/x/sync v0.1.0
 	gorm.io/gorm v1.23.5
 )

go.sum

@@ -650,6 +650,7 @@ github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZb
 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/posener/complete v1.2.3/go.mod h1:WZIdtGGp+qx0sLrYKtIRAruyNpv6hFCicSgv7Sy7s/s=
+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 v1.0.0/go.mod h1:db9x61etRT2tGnBNRi70OPL5FsnadC4Ky3P0J6CfImo=
 github.com/prometheus/client_golang v1.4.0/go.mod h1:e9GMxYsXl05ICDXkRhurwBS4Q3OK1iX/F2sw+iXX5zU=
@@ -762,6 +763,8 @@ go.uber.org/atomic v1.4.0/go.mod h1:gD2HeocX3+yG+ygLZcrzQJaqmWj9AIm7n08wl/qW/PE=
 go.uber.org/atomic v1.6.0/go.mod h1:sABNBOSYdrvTF6hTgEIbc7YasKWGhgEQZyfxyTvoXHQ=
 go.uber.org/atomic v1.7.0/go.mod h1:fEN4uk6kAWBTFdckzkM89CLk9XfWZrxpCo0nPH17wJc=
 go.uber.org/atomic v1.9.0/go.mod h1:fEN4uk6kAWBTFdckzkM89CLk9XfWZrxpCo0nPH17wJc=
+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/multierr v1.1.0/go.mod h1:wR5kodmAFQ0UK8QlbwjlSNy0Z68gJhDJUG5sjR94q/0=
 go.uber.org/multierr v1.5.0/go.mod h1:FeouvMocqHpRaaGuG9EjoKcStLC43Zu/fmqdUMPcKYU=

webapp/backend/cmd/scrutiny/scrutiny.go

@@ -16,6 +16,7 @@ import (
 	utils "github.com/analogj/go-util/utils"
 	"github.com/fatih/color"
 	"github.com/urfave/cli/v2"
+	_ "go.uber.org/automaxprocs"
 )
 
 var goos string
@@ -36,8 +37,8 @@ func main() {
 	}
 
 	//we're going to load the config file manually, since we need to validate it.
-	err = config.ReadConfig(configFilePath) // Find and read the config file
-	if _, ok := err.(errors.ConfigFileMissingError); ok {         // Handle errors reading the config file
+	err = config.ReadConfig(configFilePath)               // Find and read the config file
+	if _, ok := err.(errors.ConfigFileMissingError); ok { // Handle errors reading the config file
 		//ignore "could not find config file"
 	} else if err != nil {
 		log.Print(color.HiRedString("CONFIG ERROR: %v", err))

webapp/backend/pkg/models/testdata/helper.go

@@ -12,6 +12,7 @@ import (
 	"time"
 
 	"github.com/analogj/scrutiny/webapp/backend/pkg/models/collector"
+	_ "go.uber.org/automaxprocs"
 )
 
 func main() {