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// Copyright 2016 The etcd Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package clientv3
import (
"log"
"os"
"go.etcd.io/etcd/client/pkg/v3/logutil"
"go.uber.org/zap/zapcore"
"go.uber.org/zap/zapgrpc"
"google.golang.org/grpc/grpclog"
)
func init() {
// We override grpc logger only when the environment variable is set
// in order to not interfere by default with user's code or other libraries.
if os.Getenv("ETCD_CLIENT_DEBUG") != "" {
lg, err := logutil.CreateDefaultZapLogger(etcdClientDebugLevel())
if err != nil {
panic(err)
}
lg = lg.Named("etcd-client")
grpclog.SetLoggerV2(zapgrpc.NewLogger(lg))
}
}
// SetLogger sets grpc logger.
//
// Deprecated: use grpclog.SetLoggerV2 directly or grpc_zap.ReplaceGrpcLoggerV2.
func SetLogger(l grpclog.LoggerV2) {
grpclog.SetLoggerV2(l)
}
// etcdClientDebugLevel translates ETCD_CLIENT_DEBUG into zap log level.
func etcdClientDebugLevel() zapcore.Level {
envLevel := os.Getenv("ETCD_CLIENT_DEBUG")
if envLevel == "" || envLevel == "true" {
return zapcore.InfoLevel
}
var l zapcore.Level
if err := l.Set(envLevel); err != nil {
log.Printf("Invalid value for environment variable 'ETCD_CLIENT_DEBUG'. Using default level: 'info'")
return zapcore.InfoLevel
}
return l
}
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