[#125] ir: Change log level on SIGHUP

Signed-off-by: Anton Nikiforov <an.nikiforov@yadro.com>

CHANGELOG.md

@@ -5,6 +5,8 @@ Changelog for FrostFS Node
 
 ### Added
 - Support impersonate bearer token (#229)
+- Change log level on SIGHUP for ir (#125)
+
 ### Changed
 ### Fixed
 - Take network settings into account during netmap contract update (#100)

cmd/frostfs-ir/config.go

@@ -0,0 +1,73 @@
+package main
+
+import (
+	"os"
+	"os/signal"
+	"syscall"
+
+	configViper "git.frostfs.info/TrueCloudLab/frostfs-node/cmd/internal/common/config"
+	"git.frostfs.info/TrueCloudLab/frostfs-node/internal/logs"
+	"github.com/spf13/viper"
+	"go.uber.org/zap"
+)
+
+func newConfig() (*viper.Viper, error) {
+	var err error
+	var dv = viper.New()
+
+	defaultConfiguration(dv)
+
+	_, err = configViper.CreateViper(configViper.WithConfigFile(*configFile),
+		configViper.WithConfigDir(*configDir), configViper.WithEnvPrefix(EnvPrefix),
+		configViper.WithViper(dv))
+	if err != nil {
+		return nil, err
+	}
+
+	return dv, err
+}
+
+func reloadConfig() error {
+	err := configViper.ReloadViper(configViper.WithConfigFile(*configFile),
+		configViper.WithConfigDir(*configDir), configViper.WithEnvPrefix(EnvPrefix),
+		configViper.WithViper(cfg))
+	if err != nil {
+		return err
+	}
+	err = logPrm.SetLevelString(cfg.GetString("logger.level"))
+	if err != nil {
+		return err
+	}
+	return logPrm.Reload()
+}
+
+func watchForSignal(cancel func()) {
+	ch := make(chan os.Signal, 1)
+	signal.Notify(ch, syscall.SIGHUP, syscall.SIGINT, syscall.SIGTERM)
+
+	for {
+		select {
+		case err := <-intErr:
+			log.Info(logs.FrostFSIRInternalError, zap.String("msg", err.Error()))
+			cancel()
+			shutdown()
+			return
+		case sig := <-ch:
+			switch sig {
+			case syscall.SIGHUP:
+				log.Info(logs.FrostFSNodeSIGHUPHasBeenReceivedRereadingConfiguration)
+				err := reloadConfig()
+				if err != nil {
+					log.Error(logs.FrostFSNodeConfigurationReading, zap.Error(err))
+				}
+				log.Info(logs.FrostFSNodeConfigurationHasBeenReloadedSuccessfully)
+			case syscall.SIGTERM, syscall.SIGINT:
+				log.Info(logs.FrostFSNodeTerminationSignalHasBeenReceivedStopping)
+				cancel()
+				shutdown()
+				log.Info(logs.FrostFSNodeTerminationSignalProcessingIsComplete)
+				return
+			}
+		}
+	}
+}

cmd/frostfs-ir/defaults.go

@@ -3,28 +3,9 @@ package main
 import (
 	"time"
 
-	configViper "git.frostfs.info/TrueCloudLab/frostfs-node/cmd/internal/common/config"
 	"github.com/spf13/viper"
 )
 
-func newConfig(path, directory string) (*viper.Viper, error) {
-	const envPrefix = "FROSTFS_IR"
-
-	var err error
-	var dv = viper.New()
-
-	defaultConfiguration(dv)
-
-	_, _, err = configViper.CreateViper(configViper.WithConfigFile(path),
-		configViper.WithConfigDir(directory), configViper.WithEnvPrefix(envPrefix),
-		configViper.WithViper(dv))
-	if err != nil {
-		return nil, err
-	}
-
-	return dv, err
-}
-
 func defaultConfiguration(cfg *viper.Viper) {
 	cfg.SetDefault("logger.level", "info")
 

cmd/frostfs-ir/main.go

@@ -6,8 +6,7 @@ import (
 	"fmt"
 	"net/http"
 	"os"
-	"os/signal"
-	"syscall"
+	"sync"
 
 	"git.frostfs.info/TrueCloudLab/frostfs-node/internal/logs"
 	"git.frostfs.info/TrueCloudLab/frostfs-node/misc"
@@ -25,6 +24,20 @@ const (
 
 	// SuccessReturnCode returns when application closed without panic.
 	SuccessReturnCode = 0
+
+	EnvPrefix = "FROSTFS_IR"
+)
+
+var (
+	wg          = new(sync.WaitGroup)
+	intErr      = make(chan error) // internal inner ring errors
+	logPrm      = new(logger.Prm)
+	innerRing   *innerring.Server
+	httpServers []*httputil.Server
+	log         *logger.Logger
+	cfg         *viper.Viper
+	configFile  *string
+	configDir   *string
 )
 
 func exitErr(err error) {
@@ -35,8 +48,8 @@ func exitErr(err error) {
 }
 
 func main() {
-	configFile := flag.String("config", "", "path to config")
-	configDir := flag.String("config-dir", "", "path to config directory")
+	configFile = flag.String("config", "", "path to config")
+	configDir = flag.String("config-dir", "", "path to config directory")
 	versionFlag := flag.Bool("version", false, "frostfs-ir node version")
 	flag.Parse()
 
@@ -46,35 +59,32 @@ func main() {
 		os.Exit(SuccessReturnCode)
 	}
 
-	cfg, err := newConfig(*configFile, *configDir)
+	var err error
+	cfg, err = newConfig()
 	exitErr(err)
 
-	var logPrm logger.Prm
-
 	err = logPrm.SetLevelString(
 		cfg.GetString("logger.level"),
 	)
 	exitErr(err)
 
-	log, err := logger.NewLogger(&logPrm)
+	log, err = logger.NewLogger(logPrm)
 	exitErr(err)
 
-	ctx, cancel := signal.NotifyContext(context.Background(), syscall.SIGINT, syscall.SIGTERM, syscall.SIGHUP)
-	defer cancel()
+	ctx, cancel := context.WithCancel(context.Background())
 
-	intErr := make(chan error) // internal inner ring errors
+	initHTTPServers(cfg)
 
-	httpServers := initHTTPServers(cfg, log)
-
-	innerRing, err := innerring.New(ctx, log, cfg, intErr)
+	innerRing, err = innerring.New(ctx, log, cfg, intErr)
 	exitErr(err)
 
 	// start HTTP servers
-	for i := range httpServers {
-		srv := httpServers[i]
-		go func() {
+	for _, srv := range httpServers {
+		wg.Add(1)
+		go func(srv *httputil.Server) {
 			exitErr(srv.Serve())
-		}()
+			wg.Done()
+		}(srv)
 	}
 
 	// start inner ring
@@ -84,32 +94,16 @@ func main() {
 	log.Info(logs.CommonApplicationStarted,
 		zap.String("version", misc.Version))
 
-	select {
-	case <-ctx.Done():
-	case err := <-intErr:
-		log.Info(logs.FrostFSIRInternalError, zap.String("msg", err.Error()))
-	}
+	watchForSignal(cancel)
 
-	innerRing.Stop()
-
-	// shut down HTTP servers
-	for i := range httpServers {
-		srv := httpServers[i]
-
-		go func() {
-			err := srv.Shutdown()
-			if err != nil {
-				log.Debug(logs.FrostFSIRCouldNotShutdownHTTPServer,
-					zap.String("error", err.Error()),
-				)
-			}
-		}()
-	}
+	<-ctx.Done() // graceful shutdown
+	log.Debug(logs.FrostFSNodeWaitingForAllProcessesToStop)
+	wg.Wait()
 
 	log.Info(logs.FrostFSIRApplicationStopped)
 }
 
-func initHTTPServers(cfg *viper.Viper, log *logger.Logger) []*httputil.Server {
+func initHTTPServers(cfg *viper.Viper) {
 	items := []struct {
 		cfgPrefix string
 		handler   func() http.Handler
@@ -118,7 +112,7 @@ func initHTTPServers(cfg *viper.Viper, log *logger.Logger) []*httputil.Server {
 		{"prometheus", promhttp.Handler},
 	}
 
-	httpServers := make([]*httputil.Server, 0, len(items))
+	httpServers = make([]*httputil.Server, 0, len(items))
 
 	for _, item := range items {
 		if !cfg.GetBool(item.cfgPrefix + ".enabled") {
@@ -141,6 +135,22 @@ func initHTTPServers(cfg *viper.Viper, log *logger.Logger) []*httputil.Server {
 			),
 		)
 	}
-
-	return httpServers
+}
+
+func shutdown() {
+	innerRing.Stop()
+
+	// shut down HTTP servers
+	for _, srv := range httpServers {
+		wg.Add(1)
+		go func(srv *httputil.Server) {
+			err := srv.Shutdown()
+			if err != nil {
+				log.Debug(logs.FrostFSIRCouldNotShutdownHTTPServer,
+					zap.String("error", err.Error()),
+				)
+			}
+			wg.Done()
+		}(srv)
+	}
 }