fix deprecated code; upgrade to go 1.21; fix Docker images

Signed-off-by: vspaz <[email protected]>

.circleci/config.yml

@@ -2,7 +2,7 @@ version: 2
 jobs:
   build:
     docker:
-    - image: circleci/golang:1.14.2-stretch
+    - image: cimg/go:1.21.4
     steps:
     - checkout
     - restore_cache:

Dockerfile

@@ -1,4 +1,4 @@
-FROM golang:1.14.2-stretch as build
+FROM golang:1.21-bullseye as build
 
 WORKDIR /slow_cooker
 
@@ -10,7 +10,7 @@ COPY . .
 
 RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -installsuffix cgo -o ./slow_cooker
 
-FROM alpine:3.12
+FROM alpine:3.18
 RUN apk --update upgrade && \
     apk add ca-certificates curl nghttp2 && \
     update-ca-certificates && \

go.mod

@@ -1,10 +1,23 @@
 module github.com/buoyantio/slow_cooker
 
-go 1.14
+go 1.21.4
 
 require (
-	github.com/codahale/hdrhistogram v0.0.0-20161010025455-3a0bb77429bd
-	github.com/kr/pretty v0.1.0 // indirect
-	github.com/prometheus/client_golang v0.9.2
-	gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127
+	github.com/HdrHistogram/hdrhistogram-go v1.1.2
+	github.com/prometheus/client_golang v1.17.0
+	gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c
+)
+
+require (
+	github.com/beorn7/perks v1.0.1 // indirect
+	github.com/cespare/xxhash/v2 v2.2.0 // indirect
+	github.com/kr/pretty v0.3.1 // indirect
+	github.com/kr/text v0.2.0 // indirect
+	github.com/matttproud/golang_protobuf_extensions/v2 v2.0.0 // indirect
+	github.com/prometheus/client_model v0.5.0 // indirect
+	github.com/prometheus/common v0.45.0 // indirect
+	github.com/prometheus/procfs v0.12.0 // indirect
+	github.com/rogpeppe/go-internal v1.11.0 // indirect
+	golang.org/x/sys v0.14.0 // indirect
+	google.golang.org/protobuf v1.31.0 // indirect
 )

go.sum

@@ -1,25 +1,92 @@
-github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973 h1:xJ4a3vCFaGF/jqvzLMYoU8P317H5OQ+Via4RmuPwCS0=
-github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973/go.mod h1:Dwedo/Wpr24TaqPxmxbtue+5NUziq4I4S80YR8gNf3Q=
-github.com/codahale/hdrhistogram v0.0.0-20161010025455-3a0bb77429bd h1:qMd81Ts1T2OTKmB4acZcyKaMtRnY5Y44NuXGX2GFJ1w=
-github.com/codahale/hdrhistogram v0.0.0-20161010025455-3a0bb77429bd/go.mod h1:sE/e/2PUdi/liOCUjSTXgM1o87ZssimdTWN964YiIeI=
-github.com/golang/protobuf v1.2.0 h1:P3YflyNX/ehuJFLhxviNdFxQPkGK5cDcApsge1SqnvM=
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-github.com/kr/pretty v0.1.0 h1:L/CwN0zerZDmRFUapSPitk6f+Q3+0za1rQkzVuMiMFI=
-github.com/kr/pretty v0.1.0/go.mod h1:dAy3ld7l9f0ibDNOQOHHMYYIIbhfbHSm3C4ZsoJORNo=
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+gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c/go.mod h1:JHkPIbrfpd72SG/EVd6muEfDQjcINNoR0C8j2r3qZ4Q=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c h1:dUUwHk2QECo/6vqA44rthZ8ie2QXMNeKRTHCNY2nXvo=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+rsc.io/pdf v0.1.1/go.mod h1:n8OzWcQ6Sp37PL01nO98y4iUCRdTGarVfzxY20ICaU4=

hdrreport/hdrreport.go

@@ -6,7 +6,7 @@ import (
 	"log"
 	"os"
 
-	"github.com/codahale/hdrhistogram"
+	"github.com/HdrHistogram/hdrhistogram-go"
 )
 
 // Quantiles contains common latency quantiles (p50, p95, p999)

main.go

@@ -9,7 +9,6 @@ import (
 	"hash"
 	"hash/fnv"
 	"io"
-	"io/ioutil"
 	"log"
 	"math"
 	"math/rand"
@@ -27,10 +26,10 @@ import (
 	"syscall"
 	"time"
 
+	"github.com/HdrHistogram/hdrhistogram-go"
 	"github.com/buoyantio/slow_cooker/hdrreport"
 	"github.com/buoyantio/slow_cooker/ring"
 	"github.com/buoyantio/slow_cooker/window"
-	"github.com/codahale/hdrhistogram"
 	"github.com/prometheus/client_golang/prometheus"
 	"github.com/prometheus/client_golang/prometheus/promhttp"
 )
@@ -57,9 +56,9 @@ func newClient(
 		DisableKeepAlives:   noreuse,
 		MaxIdleConnsPerHost: maxConn,
 		Proxy:               http.ProxyFromEnvironment,
-		Dial: (&net.Dialer{
+		DialContext: (&net.Dialer{
 			Timeout: 5 * time.Second,
-		}).Dial,
+		}).DialContext,
 		TLSHandshakeTimeout: 5 * time.Second,
 		TLSClientConfig:     &tls.Config{InsecureSkipVerify: true},
 	}
@@ -115,7 +114,7 @@ func sendRequest(
 	} else {
 		defer response.Body.Close()
 		if !checkHash {
-			if sz, err := io.CopyBuffer(ioutil.Discard, response.Body, bodyBuffer); err == nil {
+			if sz, err := io.CopyBuffer(io.Discard, response.Body, bodyBuffer); err == nil {
 
 				received <- &MeasuredResponse{
 					sz:      uint64(sz),
@@ -125,7 +124,7 @@ func sendRequest(
 				received <- &MeasuredResponse{err: err}
 			}
 		} else {
-			if bytes, err := ioutil.ReadAll(response.Body); err != nil {
+			if bytes, err := io.ReadAll(response.Body); err != nil {
 				received <- &MeasuredResponse{err: err}
 			} else {
 				hasher.Write(bytes)
@@ -201,7 +200,7 @@ func loadData(data string) []byte {
 			defer file.Close()
 		}
 
-		requestData, err = ioutil.ReadAll(file)
+		requestData, err = io.ReadAll(file)
 		if err != nil {
 			fmt.Fprintf(os.Stderr, err.Error())
 			os.Exit(1)
@@ -418,7 +417,7 @@ func main() {
 			// For each goroutine we want to reuse a buffer for performance reasons.
 			bodyBuffer := make([]byte, 50000)
 			sendTraffic.Add(1)
-			for _ = range ticker.C {
+			for range ticker.C {
 				var checkHash bool
 				hasher := fnv.New64a()
 				if *hashSampleRate > 0.0 {