func apiMigrateStatus() (int, string) {
conn := CreateCoordConn()
defer conn.Close()
migrateSlots, err := models.GetMigratingSlots(conn, globalEnv.ProductName())
if err != nil && !zkhelper.ZkErrorEqual(err, zk.ErrNoNode) {
return 500, err.Error()
}
b, err := json.MarshalIndent(map[string]interface{}{
"migrate_slots": migrateSlots,
"migrate_task": globalMigrateManager.runningTask,
}, " ", " ")
return 200, string(b)
}
func preMigrateCheck(t *MigrateTask) (bool, error) {
conn := CreateCoordConn()
defer conn.Close()
slots, err := models.GetMigratingSlots(conn, t.productName)
if err != nil {
return false, errors.Trace(err)
}
// check if there is migrating slot
if len(slots) > 1 {
return false, errors.New("more than one slots are migrating, unknown error")
}
if len(slots) == 1 {
slot := slots[0]
if t.NewGroupId != slot.State.MigrateStatus.To || t.FromSlot != slot.Id || t.ToSlot != slot.Id {
return false, errors.Errorf("there is a migrating slot %+v, finish it first", slot)
}
}
return true, nil
}