Merge pull request #1750 from zaunist/fix/deprecation

fix: Deprecation of package ioutil in Go 1.16

Author: k8s-ci-robot

.golangci.yml

@@ -13,6 +13,7 @@ linters:
   - goimports
   - revive
   - govet
+  - gomodguard
   - misspell
   - exportloopref
   disable:
@@ -36,7 +37,16 @@ linters-settings:
     check-shadowing: true
   misspell:
     locale: US
-    ignore-words:
+    ignore-words: []
+  gomodguard:
+    blocked:
+    # List of blocked modules.
+      modules:
+        - io/ioutil:
+            recommendations:
+              - io
+              - os
+            reason: "Deprecation of package ioutil in Go 1.16."
 
 issues:
   exclude-rules:

conformance/utils/roundtripper/roundtripper.go

@@ -23,7 +23,6 @@ import (
 	"encoding/json"
 	"fmt"
 	"io"
-	iou "io/ioutil"
 	"net/http"
 	"net/http/httputil"
 	"net/url"
@@ -182,7 +181,10 @@ func (d *DefaultRoundTripper) CaptureRoundTrip(request Request) (*CapturedReques
 		fmt.Printf("Received Response:\n%s\n\n", formatDump(dump, "< "))
 	}
 
-	body, _ := iou.ReadAll(resp.Body)
+	body, err := io.ReadAll(resp.Body)
+	if err != nil {
+		return nil, nil, err
+	}
 
 	// we cannot assume the response is JSON
 	if resp.Header.Get("Content-type") == "application/json" {