login: uses epochs for login throtting.

Closes #10937

pkg/services/sqlstore/migrations/common.go

@@ -34,6 +34,7 @@ func addTableReplaceMigrations(mg *Migrator, from Table, to Table, migrationVers
 	copyTableData := fmt.Sprintf("copy %v %v to %v", to.Name, fromV, toV)
 	dropTable := fmt.Sprintf("drop %v", tmpTableName)
 
+	addDropAllIndicesMigrations(mg, fromV, from)
 	addTableRenameMigration(mg, from.Name, tmpTableName, fromV)
 	mg.AddMigration(createTable, NewAddTableMigration(to))
 	addTableIndicesMigrations(mg, toV, to)

pkg/services/sqlstore/migrations/dashboard_mig.go

@@ -187,10 +187,7 @@ func addDashboardMigration(mg *Migrator) {
 			{Name: "external_id", Type: DB_Text, Nullable: false},
 			{Name: "updated", Type: DB_DateTime, Nullable: false},
 		},
-		Indices: []*Index{
-			{Cols: []string{"dashboard_id"}},
-			{Cols: []string{"dashboard_id", "name"}, Type: IndexType},
-		},
+		Indices: []*Index{},
 	}
 
 	mg.AddMigration("create dashboard_provisioning", NewAddTableMigration(dashboardExtrasTable))

pkg/services/sqlstore/migrations/login_attempt_mig.go

@@ -20,4 +20,24 @@ func addLoginAttemptMigrations(mg *Migrator) {
 	mg.AddMigration("create login attempt table", NewAddTableMigration(loginAttemptV1))
 	// add indices
 	mg.AddMigration("add index login_attempt.username", NewAddIndexMigration(loginAttemptV1, loginAttemptV1.Indices[0]))
+
+	loginAttemptV2 := Table{
+		Name: "login_attempt",
+		Columns: []*Column{
+			{Name: "id", Type: DB_BigInt, IsPrimaryKey: true, IsAutoIncrement: true},
+			{Name: "username", Type: DB_NVarchar, Length: 190, Nullable: false},
+			{Name: "ip_address", Type: DB_NVarchar, Length: 30, Nullable: false},
+			{Name: "created", Type: DB_Int, Default: "0", Nullable: false},
+		},
+		Indices: []*Index{
+			{Cols: []string{"username"}},
+		},
+	}
+
+	addTableReplaceMigrations(mg, loginAttemptV1, loginAttemptV2, 2, map[string]string{
+		"id":         "id",
+		"username":   "username",
+		"ip_address": "ip_address",
+		"created":    "created",
+	})
 }