add logging

Dockerfile

@@ -50,6 +50,9 @@ COPY --from=go-builder /app/.env* ./
 # Copy the React build from frontend-builder stage
 COPY --from=frontend-builder /app/frontend/build ./frontend/build
 
+# Create log directory with proper permissions
+RUN mkdir -p /app/logs && chmod 755 /app/logs
+
 # Expose port
 EXPOSE 8080
 

_.env.development

@@ -3,5 +3,8 @@ ENVIRONMENT=development
 DATABASE_URL=postgres://postgres:password@postgres:5432/counter_db?sslmode=disable
 JWT_SECRET=dev-secret-key-change-in-production
 PORT=8080
+METRICS_PORT=9090
 GIN_MODE=debug
 LOG_LEVEL=debug
+LOG_DIR=/app/logs
+LOG_VOLUME=counter_logs

config.go

@@ -26,6 +26,8 @@ type Config struct {
 	GinMode     string
 	LogLevel    string
 	Debug       bool
+	LogDir      string
+	LogVolume   string
 }
 
 // LoadConfig loads configuration with proper environment file precedence
@@ -46,6 +48,8 @@ func LoadConfig() *Config {
 		GinMode:     getGinMode(env),
 		LogLevel:    getLogLevel(env),
 		Debug:       env == Development,
+		LogDir:      getEnv("LOG_DIR", "/app/logs"),
+		LogVolume:   getEnv("LOG_VOLUME", "counter_logs"),
 	}
 
 	// Log configuration (without sensitive data)
@@ -183,6 +187,8 @@ func logConfig(config *Config) {
 	log.Printf("║  📊 LOG LEVEL: %-15s                              ║", config.LogLevel)
 	log.Printf("║  🌐 PORT: %-20s                              ║", config.Port)
 	log.Printf("║  📈 METRICS PORT: %-15s                              ║", config.MetricsPort)
+	log.Printf("║  📝 LOG DIR: %-20s                              ║", config.LogDir)
+	log.Printf("║  📦 LOG VOLUME: %-18s                              ║", config.LogVolume)
 	log.Printf("║                                                              ║")
 	log.Printf("║  📁 Configuration Files Loaded:                              ║")
 	log.Printf("║     • .env (base configuration)                              ║")

docker-compose.yml

@@ -1,26 +1,11 @@
 services:
-  postgres:
-    image: postgres:15-alpine
-    environment:
-      POSTGRES_DB: counter_db
-      POSTGRES_USER: postgres
-      POSTGRES_PASSWORD: password
-    ports:
-      - "5432:5432"
-    volumes:
-      - postgres_data:/var/lib/postgresql/data
-    healthcheck:
-      test: ["CMD-SHELL", "pg_isready -U postgres"]
-      interval: 10s
-      timeout: 5s
-      retries: 5
-
   app:
     build: .
     ports:
       - "8080:8080"
     environment:
       - ENVIRONMENT=development
+      - LOG_VOLUME=${LOG_VOLUME:-counter_logs}
     env_file:
       - .env.development
     depends_on:
@@ -28,6 +13,4 @@ services:
         condition: service_healthy
     volumes:
       - ./frontend/build:/app/frontend/build
-
-volumes:
-  postgres_data:
+      - ${LOG_VOLUME:-counter_logs}:/app/logs

env.example

@@ -6,7 +6,13 @@ JWT_SECRET=your-super-secret-jwt-key-change-in-production
 
 # Server Configuration
 PORT=8080
+METRICS_PORT=9090
 GIN_MODE=release
 
+# Logging Configuration
+LOG_LEVEL=info
+LOG_DIR=/app/logs
+LOG_VOLUME=counter_logs
+
 # Frontend Configuration (for development)
 REACT_APP_API_URL=http://localhost:8080/api/v1

go.mod

@@ -38,6 +38,7 @@ require (
 	github.com/prometheus/client_model v0.6.1 // indirect
 	github.com/prometheus/common v0.62.0 // indirect
 	github.com/prometheus/procfs v0.15.1 // indirect
+	github.com/sirupsen/logrus v1.9.3 // indirect
 	github.com/twitchyliquid64/golang-asm v0.15.1 // indirect
 	github.com/ugorji/go/codec v1.2.12 // indirect
 	golang.org/x/arch v0.8.0 // indirect

go.sum

@@ -80,6 +80,8 @@ github.com/prometheus/procfs v0.15.1 h1:YagwOFzUgYfKKHX6Dr+sHT7km/hxC76UB0leargg
 github.com/prometheus/procfs v0.15.1/go.mod h1:fB45yRUv8NstnjriLhBQLuOUt+WW4BsoGhij/e3PBqk=
 github.com/rogpeppe/go-internal v1.10.0 h1:TMyTOH3F/DB16zRVcYyreMH6GnZZrwQVAoYjRBZyWFQ=
 github.com/rogpeppe/go-internal v1.10.0/go.mod h1:UQnix2H7Ngw/k4C5ijL5+65zddjncjaFoBhdsK/akog=
+github.com/sirupsen/logrus v1.9.3 h1:dueUQJ1C2q9oE3F7wvmSGAaVtTmUizReu6fjN8uqzbQ=
+github.com/sirupsen/logrus v1.9.3/go.mod h1:naHLuLoDiP4jHNo9R0sCBMtWGeIprob74mVsIT4qYEQ=
 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=
@@ -104,6 +106,7 @@ golang.org/x/crypto v0.31.0 h1:ihbySMvVjLAeSH1IbfcRTkD/iNscyz8rGzjF/E5hV6U=
 golang.org/x/crypto v0.31.0/go.mod h1:kDsLvtWBEx7MV9tJOj9bnXsPbxwJQ6csT/x4KIN4Ssk=
 golang.org/x/net v0.33.0 h1:74SYHlV8BIgHIFC/LrYkOGIwL19eTYXQ5wc6TBuO36I=
 golang.org/x/net v0.33.0/go.mod h1:HXLR5J+9DxmrqMwG9qjGCxZ+zKXxBru04zlTvWlWuN4=
+golang.org/x/sys v0.0.0-20220715151400-c0bba94af5f8/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 v0.28.0 h1:Fksou7UEQUWlKvIdsqzJmUmCX3cZuD2+P3XyyzwMhlA=

logger.go

@@ -0,0 +1,105 @@
+package main
+
+import (
+	"io"
+	"os"
+	"path/filepath"
+	"time"
+
+	"github.com/gin-gonic/gin"
+	"github.com/sirupsen/logrus"
+)
+
+// Logger is the global logger instance
+var Logger *logrus.Logger
+
+// InitLogger initializes the structured logger with file output
+func InitLogger(config *Config) error {
+	Logger = logrus.New()
+
+	// Set log level based on configuration
+	level, err := logrus.ParseLevel(config.LogLevel)
+	if err != nil {
+		level = logrus.InfoLevel
+	}
+	Logger.SetLevel(level)
+
+	// Set JSON formatter for structured logging
+	Logger.SetFormatter(&logrus.JSONFormatter{
+		TimestampFormat: time.RFC3339,
+		FieldMap: logrus.FieldMap{
+			logrus.FieldKeyTime:  "timestamp",
+			logrus.FieldKeyLevel: "level",
+			logrus.FieldKeyMsg:   "message",
+		},
+	})
+
+	// Create log directory if it doesn't exist
+	if err := os.MkdirAll(config.LogDir, 0755); err != nil {
+		return err
+	}
+
+	// Create log file with timestamp
+	logFile := filepath.Join(config.LogDir, "app.log")
+	file, err := os.OpenFile(logFile, os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0666)
+	if err != nil {
+		return err
+	}
+
+	// Set output to both file and stdout
+	multiWriter := io.MultiWriter(os.Stdout, file)
+	Logger.SetOutput(multiWriter)
+
+	// Add default fields
+	Logger = Logger.WithFields(logrus.Fields{
+		"service":     "counter-app",
+		"environment": string(config.Environment),
+		"version":     "1.0.0",
+	}).Logger
+
+	// Log initialization
+	Logger.Info("Logger initialized successfully")
+
+	return nil
+}
+
+// GetLogger returns the global logger instance
+func GetLogger() *logrus.Logger {
+	if Logger == nil {
+		// Fallback to standard logger if not initialized
+		logrus.SetFormatter(&logrus.JSONFormatter{
+			TimestampFormat: time.RFC3339,
+		})
+		return logrus.StandardLogger()
+	}
+	return Logger
+}
+
+// LoggingMiddleware creates a Gin middleware for HTTP request logging
+func LoggingMiddleware() gin.HandlerFunc {
+	return gin.LoggerWithFormatter(func(param gin.LogFormatterParams) string {
+		// Create structured log entry
+		entry := Logger.WithFields(logrus.Fields{
+			"method":     param.Method,
+			"path":       param.Path,
+			"status":     param.StatusCode,
+			"latency":    param.Latency.String(),
+			"client_ip":  param.ClientIP,
+			"user_agent": param.Request.UserAgent(),
+			"timestamp":  param.TimeStamp.Format(time.RFC3339),
+		})
+
+		// Set log level based on status code
+		switch {
+		case param.StatusCode >= 500:
+			entry.Error("HTTP Request")
+		case param.StatusCode >= 400:
+			entry.Warn("HTTP Request")
+		default:
+			entry.Info("HTTP Request")
+		}
+
+		// Return empty string since we're handling logging ourselves
+		return ""
+	})
+}

main.go

@@ -5,12 +5,18 @@ import (
 
 	"github.com/gin-contrib/cors"
 	"github.com/gin-gonic/gin"
+	"github.com/sirupsen/logrus"
 )
 
 func main() {
 	// Load configuration with environment file precedence
 	config := LoadConfig()
 
+	// Initialize structured logger
+	if err := InitLogger(config); err != nil {
+		log.Fatal("Failed to initialize logger:", err)
+	}
+
 	// Set Gin mode based on configuration
 	gin.SetMode(config.GinMode)
 
@@ -19,12 +25,12 @@ func main() {
 
 	// Initialize database with configuration
 	if err := InitDBWithConfig(config); err != nil {
-		log.Fatal("Failed to initialize database :", err)
+		Logger.WithError(err).Fatal("Failed to initialize database")
 	}
 
 	// Create tables
 	if err := CreateTables(); err != nil {
-		log.Fatal("Failed to create tables:", err)
+		Logger.WithError(err).Fatal("Failed to create tables")
 	}
 
 	// Initialize Prometheus metrics
@@ -47,6 +53,9 @@ func main() {
 	// Add metrics middleware
 	r.Use(MetricsMiddleware())
 
+	// Add logging middleware
+	r.Use(LoggingMiddleware())
+
 	// Health check endpoint
 	r.GET("/health", func(c *gin.Context) {
 		c.JSON(200, gin.H{"status": "ok"})
@@ -88,16 +97,19 @@ func main() {
 	// Start server
 	port := config.Port
 
-	log.Printf("")
-	log.Printf("🚀 Starting Counter Application Server...")
-	log.Printf("   🌐 Listening on: http://localhost:%s", port)
-	log.Printf("   📊 Health check: http://localhost:%s/health", port)
-	log.Printf("   🔗 API endpoint: http://localhost:%s/api/v1", port)
-	log.Printf("   🎨 Frontend: http://localhost:%s/", port)
-	log.Printf("   📈 Metrics: http://localhost:%s/metrics", config.MetricsPort)
-	log.Printf("")
-	log.Printf("✅ Server is ready and accepting connections!")
-	log.Printf("")
+	Logger.WithFields(logrus.Fields{
+		"port":         port,
+		"metrics_port": config.MetricsPort,
+		"log_dir":      config.LogDir,
+		"log_volume":   config.LogVolume,
+	}).Info("🚀 Starting Counter Application Server")
 
-	log.Fatal(r.Run(":" + port))
+	Logger.WithFields(logrus.Fields{
+		"health_url":   "http://localhost:" + port + "/health",
+		"api_url":      "http://localhost:" + port + "/api/v1",
+		"frontend_url": "http://localhost:" + port + "/",
+		"metrics_url":  "http://localhost:" + config.MetricsPort + "/metrics",
+	}).Info("✅ Server is ready and accepting connections")
+
+	Logger.Fatal(r.Run(":" + port))
 }