Logging w/ logrus

cmd/main.go

@@ -2,9 +2,8 @@ package main
 
 import (
 	"fmt"
-	"log"
 	"net/http"
-	"time"
+	"os"
 
 	"github.com/GOLANG-NINJA/crud-app/internal/config"
 	"github.com/GOLANG-NINJA/crud-app/internal/repository/psql"
@@ -13,21 +12,27 @@ import (
 	"github.com/GOLANG-NINJA/crud-app/pkg/database"
 
 	_ "github.com/lib/pq"
+
+	log "github.com/sirupsen/logrus"
 )
 
 const (
 	CONFIG_DIR  = "configs"
 	CONFIG_FILE = "main"
 )
 
+func init() {
+	log.SetFormatter(&log.JSONFormatter{})
+	log.SetOutput(os.Stdout)
+	log.SetLevel(log.InfoLevel)
+}
+
 func main() {
 	cfg, err := config.New(CONFIG_DIR, CONFIG_FILE)
 	if err != nil {
 		log.Fatal(err)
 	}
 
-	log.Printf("config: %+v\n", cfg)
-
 	// init db
 	db, err := database.NewPostgresConnection(database.ConnectionInfo{
 		Host:     cfg.DB.Host,
@@ -53,7 +58,7 @@ func main() {
 		Handler: handler.InitRouter(),
 	}
 
-	log.Println("SERVER STARTED AT", time.Now().Format(time.RFC3339))
+	log.Info("SERVER STARTED")
 
 	if err := srv.ListenAndServe(); err != nil {
 		log.Fatal(err)

go.mod

@@ -11,6 +11,7 @@ require (
 	github.com/magiconair/properties v1.8.5 // indirect
 	github.com/mitchellh/mapstructure v1.4.2 // indirect
 	github.com/pelletier/go-toml v1.9.4 // indirect
+	github.com/sirupsen/logrus v1.8.1 // indirect
 	github.com/spf13/afero v1.6.0 // indirect
 	github.com/spf13/cast v1.4.1 // indirect
 	github.com/spf13/jwalterweatherman v1.1.0 // indirect

go.sum

@@ -229,6 +229,8 @@ github.com/rogpeppe/go-internal v1.3.0/go.mod h1:M8bDsm7K2OlrFYOpmOWEs/qY81heoFR
 github.com/ryanuber/columnize v0.0.0-20160712163229-9b3edd62028f/go.mod h1:sm1tb6uqfes/u+d4ooFouqFdy9/2g9QGwK3SQygK0Ts=
 github.com/sagikazarmark/crypt v0.1.0/go.mod h1:B/mN0msZuINBtQ1zZLEQcegFJJf9vnYIR88KRMEuODE=
 github.com/sean-/seed v0.0.0-20170313163322-e2103e2c3529/go.mod h1:DxrIzT+xaE7yg65j358z/aeFdxmN0P9QXhEzd20vsDc=
+github.com/sirupsen/logrus v1.8.1 h1:dJKuHgqk1NNQlqoA6BTlM1Wf9DOH3NBjQyu0h9+AZZE=
+github.com/sirupsen/logrus v1.8.1/go.mod h1:yWOB1SBYBC5VeMP7gHvWumXLIWorT60ONWic61uBYv0=
 github.com/spaolacci/murmur3 v0.0.0-20180118202830-f09979ecbc72/go.mod h1:JwIasOWyU6f++ZhiEuf87xNszmSA2myDM2Kzu9HwQUA=
 github.com/spf13/afero v1.6.0 h1:xoax2sJ2DT8S8xA2paPFjDCScCNeWsg75VG0DLRreiY=
 github.com/spf13/afero v1.6.0/go.mod h1:Ai8FlHk4v/PARR026UzYexafAt9roJ7LcLMAmO6Z93I=

internal/transport/rest/handler.go

@@ -5,10 +5,11 @@ import (
 	"encoding/json"
 	"errors"
 	"io/ioutil"
-	"log"
 	"net/http"
 	"strconv"
 
+	log "github.com/sirupsen/logrus"
+
 	"github.com/GOLANG-NINJA/crud-app/internal/domain"
 
 	"github.com/gorilla/mux"
@@ -82,19 +83,30 @@ func (h *Handler) getBookByID(w http.ResponseWriter, r *http.Request) {
 func (h *Handler) createBook(w http.ResponseWriter, r *http.Request) {
 	reqBytes, err := ioutil.ReadAll(r.Body)
 	if err != nil {
+		log.WithFields(log.Fields{
+			"handler": "createBook",
+			"problem": "reading request body",
+		}).Error(err)
 		w.WriteHeader(http.StatusBadRequest)
 		return
 	}
 
 	var book domain.Book
 	if err = json.Unmarshal(reqBytes, &book); err != nil {
+		log.WithFields(log.Fields{
+			"handler": "createBook",
+			"problem": "unmarshaling request",
+		}).Error(err)
 		w.WriteHeader(http.StatusBadRequest)
 		return
 	}
 
 	err = h.booksService.Create(context.TODO(), book)
 	if err != nil {
-		log.Println("createBook() error:", err)
+		log.WithFields(log.Fields{
+			"handler": "createBook",
+			"problem": "service error",
+		}).Error(err)
 		w.WriteHeader(http.StatusInternalServerError)
 		return
 	}

internal/transport/rest/middleware.go

@@ -1,14 +1,17 @@
 package rest
 
 import (
-	"log"
 	"net/http"
-	"time"
+
+	log "github.com/sirupsen/logrus"
 )
 
 func loggingMiddleware(next http.Handler) http.Handler {
 	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		log.Printf("%s: [%s] - %s ", time.Now().Format(time.RFC3339), r.Method, r.RequestURI)
+		log.WithFields(log.Fields{
+			"method": r.Method,
+			"uri":    r.RequestURI,
+		}).Info()
 		next.ServeHTTP(w, r)
 	})
 }