KCP: stop recreating logger for etcd client

Signed-off-by: Stefan Büringer [email protected]

Author: sbueringer

controlplane/kubeadm/internal/etcd/etcd.go

@@ -24,7 +24,9 @@ import (
 
 	"github.com/pkg/errors"
 	"go.etcd.io/etcd/api/v3/etcdserverpb"
+	"go.etcd.io/etcd/client/pkg/v3/logutil"
 	clientv3 "go.etcd.io/etcd/client/v3"
+	"go.uber.org/zap/zapcore"
 	"google.golang.org/grpc"
 	kerrors "k8s.io/apimachinery/pkg/util/errors"
 
@@ -138,6 +140,12 @@ type ClientConfiguration struct {
 	CallTimeout time.Duration
 }
 
+var (
+	// Create the etcdClientLogger only once. Otherwise every call of clientv3.New
+	// would create its own logger which leads to a lot of memory allocations.
+	etcdClientLogger, _ = logutil.CreateDefaultZapLogger(zapcore.InfoLevel)
+)
+
 // NewClient creates a new etcd client with the given configuration.
 func NewClient(ctx context.Context, config ClientConfiguration) (*Client, error) {
 	dialer, err := proxy.NewDialer(config.Proxy)
@@ -151,7 +159,8 @@ func NewClient(ctx context.Context, config ClientConfiguration) (*Client, error)
 		DialOptions: []grpc.DialOption{
 			grpc.WithContextDialer(dialer.DialContextWithAddr),
 		},
-		TLS: config.TLSConfig,
+		TLS:    config.TLSConfig,
+		Logger: etcdClientLogger,
 	})
 	if err != nil {
 		return nil, errors.Wrap(err, "unable to create etcd client")

go.mod

@@ -32,7 +32,9 @@ require (
 	github.com/spf13/viper v1.19.0
 	github.com/valyala/fastjson v1.6.4
 	go.etcd.io/etcd/api/v3 v3.5.17
+	go.etcd.io/etcd/client/pkg/v3 v3.5.17
 	go.etcd.io/etcd/client/v3 v3.5.17
+	go.uber.org/zap v1.27.0
 	golang.org/x/exp v0.0.0-20240719175910-8a7402abbf56
 	golang.org/x/oauth2 v0.24.0
 	golang.org/x/text v0.21.0
@@ -125,7 +127,6 @@ require (
 	github.com/subosito/gotenv v1.6.0 // indirect
 	github.com/vincent-petithory/dataurl v1.0.0 // indirect
 	github.com/x448/float16 v0.8.4 // indirect
-	go.etcd.io/etcd/client/pkg/v3 v3.5.17 // indirect
 	go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.53.0 // indirect
 	go.opentelemetry.io/otel v1.28.0 // indirect
 	go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.28.0 // indirect
@@ -135,7 +136,6 @@ require (
 	go.opentelemetry.io/otel/trace v1.28.0 // indirect
 	go.opentelemetry.io/proto/otlp v1.3.1 // indirect
 	go.uber.org/multierr v1.11.0 // indirect
-	go.uber.org/zap v1.27.0 // indirect
 	go4.org v0.0.0-20201209231011-d4a079459e60 // indirect
 	golang.org/x/crypto v0.31.0 // indirect
 	golang.org/x/net v0.33.0 // indirect