fix: set DescribeConfigRequest Version field

admin.go

@@ -452,7 +452,6 @@ func dependsOnSpecificNode(resource ConfigResource) bool {
 }
 
 func (ca *clusterAdmin) DescribeConfig(resource ConfigResource) ([]ConfigEntry, error) {
-
 	var entries []ConfigEntry
 	var resources []*ConfigResource
 	resources = append(resources, &resource)
@@ -461,6 +460,14 @@ func (ca *clusterAdmin) DescribeConfig(resource ConfigResource) ([]ConfigEntry,
 		Resources: resources,
 	}
 
+	if ca.conf.Version.IsAtLeast(V1_1_0_0) {
+		request.Version = 1
+	}
+
+	if ca.conf.Version.IsAtLeast(V2_0_0_0) {
+		request.Version = 2
+	}
+
 	var (
 		b   *Broker
 		err error

admin_test.go

@@ -2,10 +2,6 @@ package sarama
 
 import (
 	"errors"
-	"fmt"
-	"io/ioutil"
-	"log"
-	"os"
 	"strings"
 	"testing"
 )
@@ -492,35 +488,64 @@ func TestClusterAdminDescribeConfig(t *testing.T) {
 		"DescribeConfigsRequest": NewMockDescribeConfigsResponse(t),
 	})
 
-	config := NewConfig()
-	config.Version = V1_0_0_0
-	admin, err := NewClusterAdmin([]string{seedBroker.Addr()}, config)
-	if err != nil {
-		t.Fatal(err)
-	}
+	var tests = []struct {
+		saramaVersion   KafkaVersion
+		requestVersion  int16
+		includeSynonyms bool
+	}{
+		{V1_0_0_0, 0, false},
+		{V1_1_0_0, 1, true},
+		{V1_1_1_0, 1, true},
+		{V2_0_0_0, 2, true},
+	}
+	for _, tt := range tests {
+		config := NewConfig()
+		config.Version = tt.saramaVersion
+		admin, err := NewClusterAdmin([]string{seedBroker.Addr()}, config)
+		if err != nil {
+			t.Fatal(err)
+		}
+		defer func() {
+			_ = admin.Close()
+		}()
+
+		resource := ConfigResource{
+			Name:        "r1",
+			Type:        TopicResource,
+			ConfigNames: []string{"my_topic"},
+		}
 
-	resource := ConfigResource{Name: "r1", Type: TopicResource, ConfigNames: []string{"my_topic"}}
-	entries, err := admin.DescribeConfig(resource)
-	if err != nil {
-		t.Fatal(err)
-	}
+		entries, err := admin.DescribeConfig(resource)
+		if err != nil {
+			t.Fatal(err)
+		}
 
-	if len(entries) <= 0 {
-		t.Fatal(errors.New("no resource present"))
-	}
+		history := seedBroker.History()
+		describeReq, ok := history[len(history)-1].Request.(*DescribeConfigsRequest)
+		if !ok {
+			t.Fatal("failed to find DescribeConfigsRequest in mockBroker history")
+		}
 
-	err = admin.Close()
-	if err != nil {
-		t.Fatal(err)
+		if describeReq.Version != tt.requestVersion {
+			t.Fatalf(
+				"requestVersion %v did not match expected %v",
+				describeReq.Version, tt.requestVersion)
+		}
+
+		if len(entries) <= 0 {
+			t.Fatal(errors.New("no resource present"))
+		}
+		if tt.includeSynonyms {
+			if len(entries[0].Synonyms) == 0 {
+				t.Fatal("expected synonyms to have been included")
+			}
+		}
 	}
 }
 
 // TestClusterAdminDescribeBrokerConfig ensures that a describe broker config
 // is sent to the broker in the resource struct, _not_ the controller
 func TestClusterAdminDescribeBrokerConfig(t *testing.T) {
-	Logger = log.New(os.Stdout, fmt.Sprintf("[%s] ", t.Name()), log.LstdFlags)
-	defer func() { Logger = log.New(ioutil.Discard, "[Sarama] ", log.LstdFlags) }()
-
 	controllerBroker := NewMockBroker(t, 1)
 	defer controllerBroker.Close()
 	configBroker := NewMockBroker(t, 2)

mockresponses.go

@@ -731,7 +731,11 @@ func NewMockDescribeConfigsResponse(t TestReporter) *MockDescribeConfigsResponse
 
 func (mr *MockDescribeConfigsResponse) For(reqBody versionedDecoder) encoder {
 	req := reqBody.(*DescribeConfigsRequest)
-	res := &DescribeConfigsResponse{}
+	res := &DescribeConfigsResponse{
+		Version: req.Version,
+	}
+
+	includeSynonyms := (req.Version > 0)
 
 	for _, r := range req.Resources {
 		var configEntries []*ConfigEntry
@@ -763,23 +767,42 @@ func (mr *MockDescribeConfigsResponse) For(reqBody versionedDecoder) encoder {
 				Configs: configEntries,
 			})
 		case TopicResource:
-			configEntries = append(configEntries,
-				&ConfigEntry{Name: "max.message.bytes",
-					Value:     "1000000",
-					ReadOnly:  false,
-					Default:   true,
-					Sensitive: false,
-				}, &ConfigEntry{Name: "retention.ms",
-					Value:     "5000",
-					ReadOnly:  false,
-					Default:   false,
-					Sensitive: false,
-				}, &ConfigEntry{Name: "password",
-					Value:     "12345",
-					ReadOnly:  false,
-					Default:   false,
-					Sensitive: true,
-				})
+			maxMessageBytes := &ConfigEntry{Name: "max.message.bytes",
+				Value:     "1000000",
+				ReadOnly:  false,
+				Default:   true,
+				Sensitive: false,
+			}
+			if includeSynonyms {
+				maxMessageBytes.Synonyms = []*ConfigSynonym{
+					{
+						ConfigName:  "max.message.bytes",
+						ConfigValue: "500000",
+					},
+				}
+			}
+			retentionMs := &ConfigEntry{Name: "retention.ms",
+				Value:     "5000",
+				ReadOnly:  false,
+				Default:   false,
+				Sensitive: false,
+			}
+			if includeSynonyms {
+				retentionMs.Synonyms = []*ConfigSynonym{
+					{
+						ConfigName:  "log.retention.ms",
+						ConfigValue: "2500",
+					},
+				}
+			}
+			password := &ConfigEntry{Name: "password",
+				Value:     "12345",
+				ReadOnly:  false,
+				Default:   false,
+				Sensitive: true,
+			}
+			configEntries = append(
+				configEntries, maxMessageBytes, retentionMs, password)
 			res.Resources = append(res.Resources, &ResourceResponse{
 				Name:    r.Name,
 				Configs: configEntries,