feat(log): replace standard logger with zerolog

- Integrate `rs/zerolog` for structured and leveled logging
- Add `EZ_LOG_LEVEL` environment variable support (default: info)
- Configure console output with timestamps and service fields
- Migrate `main.go` and `LogWriter` to use the new logger instance
- Update README with logging configuration and design details

README.md

@@ -39,6 +39,7 @@ EZ-API 是"大脑"。它管理着事实的来源 (Source of Truth)。
 | `EZ_REDIS_ADDR` | `localhost:6379` | Redis 地址。 |
 | `EZ_LOG_QUEUE` | `10000` | 日志缓冲通道的容量。 |
 | `EZ_LOG_BATCH_SIZE` | `10` | 单次 DB 事务写入的日志数量。 |
+| `EZ_LOG_LEVEL` | `info` | 日志级别，支持 `debug`、`info`、`warn`、`error`。 |
 
 ## 运行方式
 
@@ -75,6 +76,11 @@ cd ez-api
 
 脚本会拉起 `docker-compose.integration.yml` 中的服务，运行带 `integration` tag 的 Go 测试，并在完成后清理容器和卷。
 
+## 日志
+
+- 使用 [zerolog](https://github.com/rs/zerolog) 输出结构化日志，默认 ConsoleWriter。
+- 通过 `EZ_LOG_LEVEL` 控制控制平面的日志等级，配合异步 DB 写入（LogWriter）一起使用。
+
 ## 设计决策
 
 - **异步日志**: 日志不会立即写入 DB。它们被缓冲在内存中，并分批刷新，以减少 DB IOPS。

cmd/server/main.go

@@ -2,10 +2,10 @@ package main
 
 import (
 	"context"
-	"log"
 	"net/http"
 	"os"
 	"os/signal"
+	"strings"
 	"syscall"
 	"time"
 
@@ -17,6 +17,8 @@ import (
 	"github.com/ez-api/ez-api/internal/service"
 	"github.com/gin-gonic/gin"
 	"github.com/redis/go-redis/v9"
+	"github.com/rs/zerolog"
+	"github.com/rs/zerolog/log"
 	swaggerFiles "github.com/swaggo/files"
 	ginSwagger "github.com/swaggo/gin-swagger"
 	"gorm.io/driver/postgres"
@@ -47,10 +49,12 @@ import (
 // @name Authorization
 
 func main() {
+	logger := setupLogger()
+
 	// 1. Load Configuration
 	cfg, err := config.Load()
 	if err != nil {
-		log.Fatalf("Failed to load config: %v", err)
+		logger.Fatal().Err(err).Msg("Failed to load config")
 	}
 
 	// 2. Initialize Redis Client
@@ -64,28 +68,28 @@ func main() {
 	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
 	defer cancel()
 	if err := rdb.Ping(ctx).Err(); err != nil {
-		log.Fatalf("Failed to connect to Redis: %v", err)
+		logger.Fatal().Err(err).Msg("Failed to connect to Redis")
 	}
-	log.Println("Connected to Redis successfully")
+	logger.Info().Msg("Connected to Redis successfully")
 
 	// 3. Initialize GORM (PostgreSQL)
 	db, err := gorm.Open(postgres.Open(cfg.Postgres.DSN), &gorm.Config{})
 	if err != nil {
-		log.Fatalf("Failed to connect to PostgreSQL: %v", err)
+		logger.Fatal().Err(err).Msg("Failed to connect to PostgreSQL")
 	}
 	sqlDB, err := db.DB()
 	if err != nil {
-		log.Fatalf("Failed to get generic database object: %v", err)
+		logger.Fatal().Err(err).Msg("Failed to get generic database object")
 	}
 	// Verify DB connection
 	if err := sqlDB.Ping(); err != nil {
-		log.Fatalf("Failed to ping PostgreSQL: %v", err)
+		logger.Fatal().Err(err).Msg("Failed to ping PostgreSQL")
 	}
-	log.Println("Connected to PostgreSQL successfully")
+	logger.Info().Msg("Connected to PostgreSQL successfully")
 
 	// Auto Migrate
 	if err := db.AutoMigrate(&model.Master{}, &model.Key{}, &model.Provider{}, &model.Model{}, &model.LogRecord{}); err != nil {
-		log.Fatalf("Failed to auto migrate: %v", err)
+		logger.Fatal().Err(err).Msg("Failed to auto migrate")
 	}
 
 	// 4. Setup Services and Handlers
@@ -97,7 +101,7 @@ func main() {
 
 	adminService, err := service.NewAdminService()
 	if err != nil {
-		log.Fatalf("Failed to create admin service: %v", err)
+		logger.Fatal().Err(err).Msg("Failed to create admin service")
 	}
 	masterService := service.NewMasterService(db)
 	healthService := service.NewHealthCheckService(db, rdb)
@@ -108,7 +112,7 @@ func main() {
 
 	// 4.1 Prime Redis snapshots so DP can start with data
 	if err := syncService.SyncAll(db); err != nil {
-		log.Printf("Initial sync warning: %v", err)
+		logger.Warn().Err(err).Msg("Initial sync warning")
 	}
 
 	// 5. Setup Gin Router
@@ -172,9 +176,9 @@ func main() {
 
 	// 6. Start Server with Graceful Shutdown
 	go func() {
-		log.Printf("Starting ez-api on port %s", cfg.Server.Port)
+		logger.Info().Str("port", cfg.Server.Port).Msg("Starting ez-api")
 		if err := srv.ListenAndServe(); err != nil && err != http.ErrServerClosed {
-			log.Fatalf("Server failed: %v", err)
+			logger.Fatal().Err(err).Msg("Server failed")
 		}
 	}()
 
@@ -182,14 +186,36 @@ func main() {
 	quit := make(chan os.Signal, 1)
 	signal.Notify(quit, syscall.SIGINT, syscall.SIGTERM)
 	<-quit
-	log.Println("Shutting down server...")
+	logger.Info().Msg("Shutting down server...")
 
 	// Shutdown with timeout
 	ctx, cancel = context.WithTimeout(context.Background(), 5*time.Second)
 	defer cancel()
 	if err := srv.Shutdown(ctx); err != nil {
-		log.Fatalf("Server forced to shutdown: %v", err)
+		logger.Fatal().Err(err).Msg("Server forced to shutdown")
 	}
 
-	log.Println("Server exited properly")
+	logger.Info().Msg("Server exited properly")
+}
+
+func setupLogger() zerolog.Logger {
+	level := zerolog.InfoLevel
+	if raw := strings.TrimSpace(os.Getenv("EZ_LOG_LEVEL")); raw != "" {
+		if parsed, err := zerolog.ParseLevel(strings.ToLower(raw)); err == nil {
+			level = parsed
+		}
+	}
+
+	zerolog.SetGlobalLevel(level)
+	output := zerolog.ConsoleWriter{
+		Out:        os.Stdout,
+		TimeFormat: time.RFC3339,
+	}
+
+	logger := zerolog.New(output).Level(level).With().
+		Timestamp().
+		Str("service", "ez-api").
+		Logger()
+	log.Logger = logger
+	return logger
 }

go.mod

@@ -6,6 +6,7 @@ require (
 	github.com/bytedance/sonic v1.14.0
 	github.com/gin-gonic/gin v1.11.0
 	github.com/redis/go-redis/v9 v9.17.2
+	github.com/rs/zerolog v1.34.0
 	github.com/swaggo/files v1.0.1
 	github.com/swaggo/gin-swagger v1.6.1
 	github.com/swaggo/swag v1.16.6
@@ -47,6 +48,7 @@ require (
 	github.com/klauspost/cpuid/v2 v2.3.0 // indirect
 	github.com/kr/text v0.2.0 // indirect
 	github.com/leodido/go-urn v1.4.0 // indirect
+	github.com/mattn/go-colorable v0.1.13 // indirect
 	github.com/mattn/go-isatty v0.0.20 // indirect
 	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
 	github.com/modern-go/reflect2 v1.0.2 // indirect

go.sum

@@ -12,6 +12,7 @@ github.com/cespare/xxhash/v2 v2.3.0 h1:UL815xU9SqsFlibzuggzjXhog7bL6oX9BbNZnL2UF
 github.com/cespare/xxhash/v2 v2.3.0/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
 github.com/cloudwego/base64x v0.1.6 h1:t11wG9AECkCDk5fMSoxmufanudBtJ+/HemLstXDLI2M=
 github.com/cloudwego/base64x v0.1.6/go.mod h1:OFcloc187FXDaYHvrNIjxSe8ncn0OOM8gEHfghB2IPU=
+github.com/coreos/go-systemd/v22 v22.5.0/go.mod h1:Y58oyj3AT4RCenI/lSvhwexgC+NSVTIJ3seZv2GcEnc=
 github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
@@ -65,6 +66,7 @@ github.com/goccy/go-json v0.10.2 h1:CrxCmQqYDkv1z7lO7Wbh2HN93uovUHgrECaO5ZrCXAU=
 github.com/goccy/go-json v0.10.2/go.mod h1:6MelG93GURQebXPDq3khkgXZkazVtN9CRI+MGFi0w8I=
 github.com/goccy/go-yaml v1.18.0 h1:8W7wMFS12Pcas7KU+VVkaiCng+kG8QiFeFwzFb+rwuw=
 github.com/goccy/go-yaml v1.18.0/go.mod h1:XBurs7gK8ATbW4ZPGKgcbrY1Br56PdM69F7LkFRi1kA=
+github.com/godbus/dbus/v5 v5.0.4/go.mod h1:xhWf0FNVPg57R7Z0UbKHbJfkEywrmjJnf7w5xrFpKfA=
 github.com/google/go-cmp v0.7.0 h1:wk8382ETsv4JYUZwIsn6YpYiWiBsYLSJiTsyBybVuN8=
 github.com/google/go-cmp v0.7.0/go.mod h1:pXiqmnSA92OHEEa9HXL2W4E7lf9JzCmGVUdgjX3N/iU=
 github.com/google/gofuzz v1.0.0/go.mod h1:dBl0BpW6vV/+mYPU4Po3pmUjxk6FQPldtuIdl/M65Eg=
@@ -90,6 +92,10 @@ github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
 github.com/kr/text v0.2.0/go.mod h1:eLer722TekiGuMkidMxC/pM04lWEeraHUUmBw8l2grE=
 github.com/leodido/go-urn v1.4.0 h1:WT9HwE9SGECu3lg4d/dIA+jxlljEa1/ffXKmRjqdmIQ=
 github.com/leodido/go-urn v1.4.0/go.mod h1:bvxc+MVxLKB4z00jd1z+Dvzr47oO32F/QSNjSBOlFxI=
+github.com/mattn/go-colorable v0.1.13 h1:fFA4WZxdEF4tXPZVKMLwD8oUnCTTo08duU7wxecdEvA=
+github.com/mattn/go-colorable v0.1.13/go.mod h1:7S9/ev0klgBDR4GtXTXX8a3vIGJpMovkB8vQcUbaXHg=
+github.com/mattn/go-isatty v0.0.16/go.mod h1:kYGgaQfpe5nmfYZH+SKPsOc2e4SrIfOl2e/yFXSvRLM=
+github.com/mattn/go-isatty v0.0.19/go.mod h1:W+V8PltTTMOvKvAeJH7IuucS94S2C6jfK/D7dTCTo3Y=
 github.com/mattn/go-isatty v0.0.20 h1:xfD0iDuEKnDkl03q4limB+vH+GxLEtL/jb4xVJSWWEY=
 github.com/mattn/go-isatty v0.0.20/go.mod h1:W+V8PltTTMOvKvAeJH7IuucS94S2C6jfK/D7dTCTo3Y=
 github.com/modern-go/concurrent v0.0.0-20180228061459-e0a39a4cb421/go.mod h1:6dJC0mAP4ikYIbvyc7fijjWJddQyLn8Ig3JB5CqoB9Q=
@@ -99,6 +105,7 @@ github.com/modern-go/reflect2 v1.0.2 h1:xBagoLtFs94CBntxluKeaWgTMpvLxC4ur3nMaC9G
 github.com/modern-go/reflect2 v1.0.2/go.mod h1:yWuevngMOJpCy52FWWMvUC8ws7m/LJsjYzDa0/r8luk=
 github.com/pelletier/go-toml/v2 v2.2.4 h1:mye9XuhQ6gvn5h28+VilKrrPoQVanw5PMw/TB0t5Ec4=
 github.com/pelletier/go-toml/v2 v2.2.4/go.mod h1:2gIqNv+qfxSVS7cM2xJQKtLSTLUE9V8t9Stt+h56mCY=
+github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/quic-go/qpack v0.5.1 h1:giqksBPnT/HDtZ6VhtFKgoLOWmlyo9Ei6u9PqzIMbhI=
@@ -109,6 +116,9 @@ github.com/redis/go-redis/v9 v9.17.2 h1:P2EGsA4qVIM3Pp+aPocCJ7DguDHhqrXNhVcEp4Vi
 github.com/redis/go-redis/v9 v9.17.2/go.mod h1:u410H11HMLoB+TP67dz8rL9s6QW2j76l0//kSOd3370=
 github.com/rogpeppe/go-internal v1.14.1 h1:UQB4HGPB6osV0SQTLymcB4TgvyWu6ZyliaW0tI/otEQ=
 github.com/rogpeppe/go-internal v1.14.1/go.mod h1:MaRKkUm5W0goXpeCfT7UZI6fk/L7L7so1lCWt35ZSgc=
+github.com/rs/xid v1.6.0/go.mod h1:7XoLgs4eV+QndskICGsho+ADou8ySMSjJKDIan90Nz0=
+github.com/rs/zerolog v1.34.0 h1:k43nTLIwcTVQAncfCw4KZ2VY6ukYoZaBPNOE8txlOeY=
+github.com/rs/zerolog v1.34.0/go.mod h1:bJsvje4Z08ROH4Nhs5iH600c3IkWhwp44iRc54W6wYQ=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/objx v0.4.0/go.mod h1:YvHI0jy2hoMjB+UWwv71VJQ9isScKT/TqJzVSSt89Yw=
 github.com/stretchr/objx v0.5.0/go.mod h1:Yh+to48EsGEfYuaHDzXPcE3xhTkx73EhmCGUpEOglKo=
@@ -158,8 +168,10 @@ golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7w
 golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20220520151302-bc2c85ada10a/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20220722155257-8c9f86f7a55f/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.0.0-20220811171246-fbc7d0a398ab/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.5.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.12.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.38.0 h1:3yZWxaJjBmCWXqhN1qh02AkOnCQ1poK6oF+a7xWL6Gc=
 golang.org/x/sys v0.38.0/go.mod h1:OgkHotnGiDImocRcuBABYBEXf8A9a87e/uXjp9XT3ks=
 golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=

internal/service/logger.go

@@ -2,10 +2,10 @@ package service
 
 import (
 	"context"
-	"log"
 	"time"
 
 	"github.com/ez-api/ez-api/internal/model"
+	"github.com/rs/zerolog/log"
 	"gorm.io/gorm"
 )
 
@@ -47,7 +47,7 @@ func (w *LogWriter) Start(ctx context.Context) {
 				return
 			}
 			if err := w.db.Create(&buf).Error; err != nil {
-				log.Printf("log batch insert failed: %v", err)
+				log.Error().Err(err).Msg("log batch insert failed")
 			}
 			buf = buf[:0]
 		}