// will block until all keys are migrated
func (task *MigrateTask) Migrate(slot *models.Slot, fromGroup, toGroup int, onProgress func(SlotMigrateProgress)) (err error) {
groupFrom, err := models.GetGroup(task.zkConn, task.productName, fromGroup)
if err != nil {
return err
}
groupTo, err := models.GetGroup(task.zkConn, task.productName, toGroup)
if err != nil {
return err
}
fromMaster, err := groupFrom.Master(task.zkConn)
if err != nil {
return err
}
toMaster, err := groupTo.Master(task.zkConn)
if err != nil {
return err
}
if fromMaster == nil || toMaster == nil {
return errors.Trace(ErrGroupMasterNotFound)
}
c, err := utils.DialTo(fromMaster.Addr, globalEnv.Password())
if err != nil {
return err
}
defer c.Close()
_, remain, err := utils.SlotsMgrtTagSlot(c, slot.Id, toMaster.Addr)
if err != nil {
return err
}
for remain > 0 {
if task.Delay > 0 {
time.Sleep(time.Duration(task.Delay) * time.Millisecond)
}
_, remain, err = utils.SlotsMgrtTagSlot(c, slot.Id, toMaster.Addr)
if remain >= 0 {
onProgress(SlotMigrateProgress{
SlotId: slot.Id,
FromGroup: fromGroup,
ToGroup: toGroup,
Remain: remain,
})
}
if err != nil {
return err
}
}
return nil
}
func apiPromoteServer(server models.Server, param martini.Params) (int, string) {
lock := utils.GetZkLock(safeZkConn, globalEnv.ProductName())
if err := lock.LockWithTimeout(0, fmt.Sprintf("promote server %+v", server)); err != nil {
return 500, err.Error()
}
defer func() {
err := lock.Unlock()
if err != nil && err != zk.ErrNoNode {
log.ErrorErrorf(err, "unlock node failed")
}
}()
group, err := models.GetGroup(safeZkConn, globalEnv.ProductName(), server.GroupId)
if err != nil {
log.ErrorErrorf(err, "get group %d failed", server.GroupId)
return 500, err.Error()
}
err = group.Promote(safeZkConn, server.Addr, globalEnv.Password())
if err != nil {
log.ErrorErrorf(err, "promote group %d failed", server.GroupId)
return 500, err.Error()
}
return jsonRetSucc()
}
func (top *Topology) GetSlotByIndex(i int) (*models.Slot, *models.ServerGroup, error) {
slot, err := models.GetSlot(top.zkConn, top.ProductName, i)
if err != nil {
return nil, nil, errors.Trace(err)
}
groupServer, err := models.GetGroup(top.zkConn, top.ProductName, slot.GroupId)
if err != nil {
return nil, nil, errors.Trace(err)
}
return slot, groupServer, nil
}
func apiGetServerGroup(param martini.Params) (int, string) {
id := param["id"]
groupId, err := strconv.Atoi(id)
if err != nil {
log.ErrorErrorf(err, "parse groupid failed")
return 500, err.Error()
}
group, err := models.GetGroup(safeZkConn, globalEnv.ProductName(), groupId)
if err != nil {
log.ErrorErrorf(err, "get group %d failed", groupId)
return 500, err.Error()
}
b, err := json.MarshalIndent(group, " ", " ")
return 200, string(b)
}
func apiGetRedisSlotInfoFromGroupId(param martini.Params) (int, string) {
groupId, err := strconv.Atoi(param["group_id"])
if err != nil {
log.ErrorErrorf(err, "parse groupid failed")
return 500, err.Error()
}
slotId, err := strconv.Atoi(param["slot_id"])
if err != nil {
log.ErrorErrorf(err, "parse slotid failed")
return 500, err.Error()
}
g, err := models.GetGroup(safeZkConn, globalEnv.ProductName(), groupId)
if err != nil {
log.ErrorErrorf(err, "get group %d failed", groupId)
return 500, err.Error()
}
s, err := g.Master(safeZkConn)
if err != nil {
log.ErrorErrorf(err, "get master of group %d failed", groupId)
return 500, err.Error()
}
if s == nil {
return 500, "master not found"
}
slotInfo, err := utils.SlotsInfo(s.Addr, globalEnv.Password(), slotId, slotId)
if err != nil {
log.ErrorErrorf(err, "get slot info %d failed", slotId)
return 500, err.Error()
}
out, _ := json.MarshalIndent(map[string]interface{}{
"keys": slotInfo[slotId],
"slot_id": slotId,
"group_id": groupId,
"addr": s.Addr,
}, " ", " ")
return 200, string(out)
}
func (top *Topology) GetGroup(groupId int) (*models.ServerGroup, error) {
return models.GetGroup(top.zkConn, top.ProductName, groupId)
}