change from db_text to nvarchar

pkg/infra/serverlock/migrations.go

@@ -8,7 +8,7 @@ func (sl *ServerLockService) AddMigration(mg *migrator.Migrator) {
 		Name: "server_lock",
 		Columns: []*migrator.Column{
 			{Name: "id", Type: migrator.DB_BigInt, IsPrimaryKey: true, IsAutoIncrement: true},
-			{Name: "operation_uid", Type: migrator.DB_Text},
+			{Name: "operation_uid", Type: migrator.DB_NVarchar, Length: 100},
 			{Name: "version", Type: migrator.DB_BigInt},
 			{Name: "last_execution", Type: migrator.DB_BigInt, Nullable: false},
 		},

pkg/infra/serverlock/serverlock.go

@@ -21,6 +21,7 @@ type ServerLockService struct {
 
 // Init this service
 func (sl *ServerLockService) Init() error {
+	sl.log = log.New("infra.lockservice")
 	return nil
 }
 

pkg/services/cleanup/cleanup.go

@@ -7,6 +7,8 @@ import (
 	"path"
 	"time"
 
+	"github.com/grafana/grafana/pkg/infra/serverlock"
+
 	"github.com/grafana/grafana/pkg/bus"
 	"github.com/grafana/grafana/pkg/log"
 	m "github.com/grafana/grafana/pkg/models"
@@ -17,6 +19,7 @@ import (
 type CleanUpService struct {
 	log               log.Logger
 	Cfg               *setting.Cfg                  `inject:""`
+	ServerLockService *serverlock.ServerLockService `inject:""`
 }
 
 func init() {
@@ -38,7 +41,10 @@ func (srv *CleanUpService) Run(ctx context.Context) error {
 			srv.cleanUpTmpFiles()
 			srv.deleteExpiredSnapshots()
 			srv.deleteExpiredDashboardVersions()
+			srv.ServerLockService.OncePerServerGroup(ctx, "delete old login attempts", time.Minute*10, func() {
 				srv.deleteOldLoginAttempts()
+			})
+
 		case <-ctx.Done():
 			return ctx.Err()
 		}