Remove dependence on io/ioutil, update Go to 1.21 (#54)

go.mod

@@ -1,6 +1,6 @@
 module github.com/dell/csm-metrics-powerstore
 
-go 1.20
+go 1.21
 
 require (
 	github.com/dell/gocsi v1.7.0

go.sum

@@ -244,6 +244,7 @@ github.com/ianlancetaylor/demangle v0.0.0-20181102032728-5e5cf60278f6/go.mod h1:
 github.com/ianlancetaylor/demangle v0.0.0-20200824232613-28f6c0f3b639/go.mod h1:aSSvb/t6k1mPoxDqO4vJh6VOCGPwU4O0C2/Eqndh1Sc=
 github.com/imdario/mergo v0.3.5/go.mod h1:2EnlNZ0deacrJVfApfmtdGgDfMuh/nq6Ok1EcJh5FfA=
 github.com/jarcoal/httpmock v1.2.0 h1:gSvTxxFR/MEMfsGrvRbdfpRUMBStovlSRLw0Ep1bwwc=
+github.com/jarcoal/httpmock v1.2.0/go.mod h1:oCoTsnAz4+UoOUIf5lJOWV2QQIW5UoeUI6aM2YnWAZk=
 github.com/jcmturner/aescts/v2 v2.0.0/go.mod h1:AiaICIRyfYg35RUkr8yESTqvSy7csK90qZ5xfvvsoNs=
 github.com/jcmturner/dnsutils/v2 v2.0.0/go.mod h1:b0TnjGOvI/n42bZa+hmXL+kFJZsFT7G4t3HTlQ184QM=
 github.com/jcmturner/gofork v1.0.0/go.mod h1:MK8+TM0La+2rjBD4jE12Kj1pCCxK7d2LK/UM3ncEo0o=

internal/common/common.go

@@ -20,7 +20,7 @@ import (
 	"context"
 	"errors"
 	"fmt"
-	"io/ioutil"
+	"os"
 	"path/filepath"
 	"regexp"
 	"strconv"
@@ -48,7 +48,7 @@ func GetPowerStoreArrays(filePath string, logger *logrus.Logger) (map[string]*se
 		Arrays []*service.PowerStoreArray `yaml:"arrays"`
 	}
 
-	data, err := ioutil.ReadFile(filepath.Clean(filePath))
+	data, err := os.ReadFile(filepath.Clean(filePath))
 	if err != nil {
 		logger.WithError(err).Errorf("cannot read file %s", filePath)
 		return nil, nil, nil, err

opentelemetry/tracers/zipkin_tracer.go

@@ -18,7 +18,7 @@ package tracer
 
 import (
 	"context"
-	"io/ioutil"
+	"io"
 	"strings"
 
 	"go.opentelemetry.io/otel"
@@ -36,7 +36,7 @@ func InitTracing(uri string, prob float64) (trace.TracerProvider, error) {
 	}
 	exporter, err := zipkin.New(
 		uri,
-		zipkin.WithLogger(stdLog.New(ioutil.Discard, "", stdLog.LstdFlags)),
+		zipkin.WithLogger(stdLog.New(io.Discard, "", stdLog.LstdFlags)),
 	)
 	if err != nil {
 		return nil, err