Merge branch 'master' into backend_plugins

* master:
  changelog: adds note about closing #10131
  Explicitly specify default region in CloudWatch datasource (#9440)
  wait for all sub routines to finish
  changelog: adds ntoe about closing #10111
  postgres: change $__timeGroup macro to include "AS time" column alias (#10119)
  fixes broken test
  Solves problem with Github authentication restriction by organization membership when the organization's access policy is set to "Access restricted". "Access restricted" policy should not stop user to authenticate.

pkg/cmd/grafana-server/server.go

@@ -11,7 +11,6 @@ import (
 	"strconv"
 	"time"
 
-	"github.com/grafana/grafana/pkg/cmd/grafana-cli/logger"
 	"github.com/grafana/grafana/pkg/services/provisioning"
 
 	"golang.org/x/sync/errgroup"
@@ -20,7 +19,6 @@ import (
 	"github.com/grafana/grafana/pkg/log"
 	"github.com/grafana/grafana/pkg/login"
 	"github.com/grafana/grafana/pkg/metrics"
-	"github.com/grafana/grafana/pkg/models"
 	"github.com/grafana/grafana/pkg/plugins"
 	"github.com/grafana/grafana/pkg/services/alerting"
 	"github.com/grafana/grafana/pkg/services/cleanup"
@@ -33,7 +31,7 @@ import (
 	"github.com/grafana/grafana/pkg/tracing"
 )
 
-func NewGrafanaServer() models.GrafanaServer {
+func NewGrafanaServer() *GrafanaServerImpl {
 	rootCtx, shutdownFn := context.WithCancel(context.Background())
 	childRoutines, childCtx := errgroup.WithContext(rootCtx)
 
@@ -54,9 +52,7 @@ type GrafanaServerImpl struct {
 	httpServer *api.HttpServer
 }
 
-func (g *GrafanaServerImpl) Start() {
-	go listenToSystemSignals(g)
-
+func (g *GrafanaServerImpl) Start() error {
 	g.initLogging()
 	g.writePIDFile()
 
@@ -75,16 +71,12 @@ func (g *GrafanaServerImpl) Start() {
 	defer pluginCloser()
 
 	if err := provisioning.Init(g.context, setting.HomePath, setting.Cfg); err != nil {
-		logger.Error("Failed to provision Grafana from config", "error", err)
-		g.Shutdown(1, "Startup failed")
-		return
+		return fmt.Errorf("Failed to provision Grafana from config. error: %v", err)
 	}
 
 	tracingCloser, err := tracing.Init(setting.Cfg)
 	if err != nil {
-		g.log.Error("Tracing settings is not valid", "error", err)
-		g.Shutdown(1, "Startup failed")
-		return
+		return fmt.Errorf("Tracing settings is not valid. error: %v", err)
 	}
 	defer tracingCloser.Close()
 
@@ -99,13 +91,12 @@ func (g *GrafanaServerImpl) Start() {
 	g.childRoutines.Go(func() error { return cleanUpService.Run(g.context) })
 
 	if err = notifications.Init(); err != nil {
-		g.log.Error("Notification service failed to initialize", "error", err)
-		g.Shutdown(1, "Startup failed")
-		return
+		return fmt.Errorf("Notification service failed to initialize. error: %v", err)
 	}
 
-	SendSystemdNotification("READY=1")
-	g.startHttpServer()
+	sendSystemdNotification("READY=1")
+
+	return g.startHttpServer()
 }
 
 func initSql() {
@@ -129,16 +120,16 @@ func (g *GrafanaServerImpl) initLogging() {
 	setting.LogConfigurationInfo()
 }
 
-func (g *GrafanaServerImpl) startHttpServer() {
+func (g *GrafanaServerImpl) startHttpServer() error {
 	g.httpServer = api.NewHttpServer()
 
 	err := g.httpServer.Start(g.context)
 
 	if err != nil {
-		g.log.Error("Fail to start server", "error", err)
-		g.Shutdown(1, "Startup failed")
-		return
+		return fmt.Errorf("Fail to start server. error: %v", err)
 	}
+
+	return nil
 }
 
 func (g *GrafanaServerImpl) Shutdown(code int, reason string) {
@@ -151,10 +142,9 @@ func (g *GrafanaServerImpl) Shutdown(code int, reason string) {
 
 	g.shutdownFn()
 	err = g.childRoutines.Wait()
-
-	g.log.Info("Shutdown completed", "reason", err)
-	log.Close()
-	os.Exit(code)
+	if err != nil && err != context.Canceled {
+		g.log.Error("Server shutdown completed with an error", "error", err)
+	}
 }
 
 func (g *GrafanaServerImpl) writePIDFile() {
@@ -179,7 +169,7 @@ func (g *GrafanaServerImpl) writePIDFile() {
 	g.log.Info("Writing PID file", "path", *pidFile, "pid", pid)
 }
 
-func SendSystemdNotification(state string) error {
+func sendSystemdNotification(state string) error {
 	notifySocket := os.Getenv("NOTIFY_SOCKET")
 
 	if notifySocket == "" {