Upgrade go verstion to 1.20 (#164)

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

.github/workflows/go-postsubmit.yml

@@ -9,7 +9,7 @@ on:
 
 env:
   # Common versions
-  GO_VERSION: '1.19'
+  GO_VERSION: '1.20'
   GO_REQUIRED_MIN_VERSION: ''
 defaults:
   run:

.github/workflows/go-presubmit.yml

@@ -13,7 +13,7 @@ on:
 
 env:
   # Common versions
-  GO_VERSION: '1.19'
+  GO_VERSION: '1.20'
   GO_REQUIRED_MIN_VERSION: ''
 
 jobs:

.github/workflows/go-release.yml

@@ -6,7 +6,7 @@ on:
       - 'v*.*.*'
 env:
   # Common versions
-  GO_VERSION: '1.19'
+  GO_VERSION: '1.20'
   GO_REQUIRED_MIN_VERSION: ''
   GITHUB_REF: ${{ github.ref }}
   CHART_NAME: 'cluster-proxy'

Makefile

@@ -57,7 +57,7 @@ vet: ## Run go vet against code.
 	go vet ./...
 
 golint:
-	go install github.com/golangci/golangci-lint/cmd/golangci-lint@v1.45.2
+	go install github.com/golangci/golangci-lint/cmd/golangci-lint@v1.54.1
 	golangci-lint run --timeout=3m ./...
 
 verify: fmt vet golint

cmd/Dockerfile

@@ -1,5 +1,5 @@
 # Build the manager binary
-FROM golang:1.19 as builder
+FROM golang:1.20 as builder
 
 WORKDIR /workspace
 

go.mod

@@ -1,6 +1,6 @@
 module open-cluster-management.io/cluster-proxy
 
-go 1.19
+go 1.20
 
 require (
 	github.com/onsi/ginkgo/v2 v2.6.0

pkg/util/portforward.go

@@ -5,7 +5,6 @@ import (
 	"errors"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"math/rand"
 	"net"
 	"net/http"
@@ -183,7 +182,7 @@ func (r *roundRobin) handle(conn net.Conn) error {
 
 	errorChan := make(chan error)
 	go func() {
-		message, err := ioutil.ReadAll(errorStream)
+		message, err := io.ReadAll(errorStream)
 		switch {
 		case err != nil:
 			errorChan <- fmt.Errorf("error reading from error stream for port %d -> %d: %v", r.targetPort, r.targetPort, err)