linter defeated!

rbd_exporter/connection/connection.go

@@ -7,11 +7,11 @@ import (
 )
 
 func Connect(params mytypes.Params) (_ mytypes.CephConnection, err error) {
-	var cephConn mytypes.CephConnection = mytypes.CephConnection{}
+	var cephConn = mytypes.CephConnection{}
 
 	defer func() {
 		if err != nil {
-			err = fmt.Errorf("Error in func connect() %w", err)
+			err = fmt.Errorf("error in func connect() %w", err)
 		}
 	}()
 

rbd_exporter/main.go

@@ -5,19 +5,17 @@ import (
 	"flag"
 	"fmt"
 	"net/http"
-	"os"
-	"rbd_exporter/mytypes"
-	"rbd_exporter/metrics"
-	"rbd_exporter/logger"
 	"rbd_exporter/connection"
+	"rbd_exporter/logger"
+	"rbd_exporter/metrics"
+	"rbd_exporter/mytypes"
+	"time"
 	"github.com/prometheus/client_golang/prometheus/promhttp"
 	"go.uber.org/zap"
 	"go.uber.org/zap/zapcore"
 )
 
 
-var params mytypes.Params
-var mainlogger *zap.SugaredLogger
 
 // Here I initialize logger
 func loggerInit() *zap.SugaredLogger {
@@ -28,17 +26,11 @@ func loggerInit() *zap.SugaredLogger {
 	if err != nil {
 		panic(fmt.Sprintf("Logger set up failed: %v", err))
 	}
-	defer func() {
-		err := logger.Sync()
-		if err != nil {
-			logger.Error("couldn't sinc logger")
-		}
-	}()
+	
 	return logger.Sugar()
 }
 
-// This func runs even before main()
-func init() {
+func globalInit() (mainlogger *zap.SugaredLogger,params mytypes.Params){
 	configFile := flag.String("config", "/etc/ceph/ceph.conf", "placement of ceph config file")
 	_keyring := flag.String("keyring", "/etc/ceph/ceph.client.admin.keyring", "placement of ceph keyring file")
 	flag.Parse()
@@ -50,33 +42,54 @@ func init() {
 	logger.SetLogger(mainlogger)
 	mainlogger.Info("Setting up logger is complete successfully")
 	mainlogger.Info("Registering prom metrics")
+
+	return mainlogger,params
 }
 
 
 func main() {
+	mainlogger,params := globalInit()
+	
+	defer func() {
+		err := logger.Logger.Sync()
+		if err != nil {
+			logger.Logger.Error("couldn't sync logger")
+		}
+	}()
 	cephConn, err := connection.Connect(params)
 	if err != nil {
-		fmt.Println(err)
+		logger.Logger.Error(err)
 		if wrapped := errors.Unwrap(err); wrapped != nil {
-			fmt.Println(wrapped)
+			logger.Logger.Error(wrapped)
 		}
-		os.Exit(1)
+		panic(err)
 	}
 	defer cephConn.Conn.Shutdown()
 	mainlogger.Info("Successfully connected to a cluster")
 
 	http.Handle("/metrics", promhttp.Handler())
 
+
+	server := http.Server{
+		Addr: ":9040",
+		ReadTimeout: 10 * time.Second,
+		Handler: http.DefaultServeMux,
+	}
+
 	// HTTP runs in separate thread cuz it blocks further execution of main
 	go func() {
 		mainlogger.Info("Starting http server")
 		// Here I check for errors if HTTP fails
-		if err := http.ListenAndServe(":9040", nil); err != nil {
+		if err := server.ListenAndServe(); err != nil {
 			mainlogger.Fatalf("HTTP server failed to start %v", err)
 		}
 		mainlogger.Info("HTTP server started")
 	}()
 
+	// if err := server.Shutdown(); err != nil {
+	// 	logger.Logger.Errorf("https server shutdown failed",err)
+	// }
+
 	
 	go metrics.GetMetrics(cephConn)
 

rbd_exporter/metrics/metrics.go

@@ -12,14 +12,14 @@ import (
 func GetMetrics(cephConn mytypes.CephConnector) {
 	metrics := InitMetrics()
 	prometheus.MustRegister(
-		metrics.Total_rbd_requested_size_per_pool,
+		metrics.TotalRbdRequestedSizePerPool,
 	)
 
 	ticker := time.NewTicker(2 *  time.Second)
 	defer ticker.Stop()
 
 	for range ticker.C {
-		var result []mytypes.Pool = []mytypes.Pool{}
+		var result = []mytypes.Pool{}
 		poolList, err := cephConn.ListPools()
 		if err != nil {
 			logger.Logger.Error("Cannot get list of pools")
@@ -32,7 +32,7 @@ func GetMetrics(cephConn mytypes.CephConnector) {
 			result = append(result, x)
 		}
 
-		metrics.Total_rbd_requested_size_per_pool.Reset()
+		metrics.TotalRbdRequestedSizePerPool.Reset()
 		for _,v := range result {
 			if !v.HasRBD {continue}
 			FillMetrics(v,metrics)
@@ -45,7 +45,7 @@ func GetMetrics(cephConn mytypes.CephConnector) {
 
 func InitMetrics() *mytypes.Metrics {
 	m := &mytypes.Metrics{
-		Total_rbd_requested_size_per_pool: prometheus.NewGaugeVec(
+		TotalRbdRequestedSizePerPool : prometheus.NewGaugeVec(
 			prometheus.GaugeOpts{
 		    Name: "total_rbd_requested_size_per_pool",
 			Help: "total size of all requested RBDs in a specific pool",
@@ -69,11 +69,11 @@ func FillMetrics(pool mytypes.Pool,metrics *mytypes.Metrics) {
 
 	logger.Logger.Debugf("Processing pool %s",pool.Name)
 	for _,v := range pool.RBDlist {
-		totalSizePerPool += uint64(v.GetSize())
+		totalSizePerPool += v.GetSize()
 	}
 	logger.Logger.Debugf("Total size of RBDs in pool %s is %d",pool.Name,totalSizePerPool)
 
-	metrics.Total_rbd_requested_size_per_pool.WithLabelValues(pool.Name,
+	metrics.TotalRbdRequestedSizePerPool.WithLabelValues(pool.Name,
 		).Set(
 		float64(totalSizePerPool))
 }

rbd_exporter/mytypes/types.go

@@ -83,7 +83,7 @@ func (riw RBDImageWrapper) Stat() (*rbd.ImageInfo,error) {
 
 type IRBD interface {
 	GetName() string
-	GetSize() int64
+	GetSize() uint64
 }
 
 type RBDUsage struct {
@@ -99,8 +99,8 @@ func (r RBD) GetName() string {
 	return r.Name
 }
 
-func (r RBD) GetSize() int64 {
-	return int64(r.Size)
+func (r RBD) GetSize() uint64 {
+	return r.Size
 }
 
 type Pool struct {
@@ -110,6 +110,6 @@ type Pool struct {
 }
 
 type Metrics struct {
-	Total_rbd_requested_size_per_pool *prometheus.GaugeVec
-	Total_rbd_requested_size prometheus.Gauge
+	TotalRbdRequestedSizePerPool *prometheus.GaugeVec
+	// Total_rbd_requested_size prometheus.Gauge
 }

rbd_exporter/rbdfactory/rbdfactory.go

@@ -7,7 +7,7 @@ import (
 )
 
 func PoolFactory(cephConn mytypes.CephConnector, poolName string) (mytypes.Pool, error) {
-	var rbdlist []mytypes.IRBD = []mytypes.IRBD{}
+	var rbdlist = []mytypes.IRBD{}
 
 	ioctx, err := cephConn.OpenIOContext(poolName)
 	if err != nil {
@@ -16,36 +16,29 @@ func PoolFactory(cephConn mytypes.CephConnector, poolName string) (mytypes.Pool,
 
 	defer ioctx.Destroy()
 
-	imageList, err := ioctx.GetImageNames()
+	imageNames, err := ioctx.GetImageNames()
 	if err != nil {
 		return mytypes.Pool{}, fmt.Errorf("couldn't get list of rbds %w", err)
 	}
-	for _, rbdname := range imageList {
-		stat, err := RBDFacroty(ioctx, rbdname)
+	for _, rbdName := range imageNames {
+		stat, err := RBDFacroty(ioctx, rbdName)
 		if err != nil {
-			fmt.Errorf("coundn't get stat from disk %s %w", rbdname, err)
-			panic(err)
+			logger.Logger.Errorf("coundn't get stat from disk %s %w", rbdName, err)
 		}
 		rbdlist = append(rbdlist, stat)
 	}
 	return mytypes.Pool{
 		Name:    poolName,
-		HasRBD: len(imageList) != 0,
+		HasRBD: len(imageNames) != 0,
 		RBDlist: rbdlist,
 	}, nil
 }
 
-func RBDFacroty(ioctx mytypes.IOContexter, rbdname string) (mytypes.RBD, error) {
-	defer func() {
-		if v := recover(); v != nil {
-			logger.Logger.Errorf("no such RBD exists (probably just deleted)")
-		}
-	}()
-
-	image := ioctx.GetImage(rbdname)
+func RBDFacroty(ioctx mytypes.IOContexter, rbdName string) (mytypes.RBD, error) {
+	image := ioctx.GetImage(rbdName)
 	err := image.Open()
 	if err != nil {
-		panic(err)
+		logger.Logger.Errorf("Couldn't open RBD %s",rbdName)
 		// logger.Logger.Errorf("Shit happened in RBDFactory")
 	}
 	
@@ -54,11 +47,11 @@ func RBDFacroty(ioctx mytypes.IOContexter, rbdname string) (mytypes.RBD, error)
 
 	info,err := image.Stat() 
 	if err != nil {
-		return mytypes.RBD{},fmt.Errorf("couldn't get stats for image %s %w",rbdname,err)
+		return mytypes.RBD{},fmt.Errorf("couldn't get stats for image %s %w",rbdName,err)
 	}
 
 	return mytypes.RBD{
-		Name: rbdname,
+		Name: rbdName,
 		ImageInfo: *info,
 	},nil
 }

rbd_exporter/tests/RBDFactory_test.go

@@ -34,7 +34,7 @@ func TestRBDFactory(t *testing.T) {
 
 	require.NoError(t, err)
 	assert.Equal(t, rbdName, result.Name)
-	assert.Equal(t, expectedImageInfo.Size, result.ImageInfo.Size)
+	assert.Equal(t, expectedImageInfo.Size, result.Size)
 }