Exemplo n.º 1
0
// 将一组新的节点(Master,NotFail,NoSlots)设置成一个ReplicaSet
// 需要保证节点覆盖所有Region
func (self *MakeReplicaSetCommand) Execute(c *cc.Controller) (cc.Result, error) {
	cs := c.ClusterState

	masterNodeId := ""
	masterRegion := meta.MasterRegion()
	regions := meta.AllRegions()

	regionExist := map[string]bool{}
	for _, r := range regions {
		regionExist[r] = false
	}

	// 检查节点状态
	for _, nodeId := range self.NodeIds {
		node := cs.FindNode(nodeId)
		if node == nil {
			return nil, ErrNodeNotExist
		}
		if node.Fail {
			return nil, fmt.Errorf("Node %s has failed", nodeId)
		}
		if !node.IsMaster() {
			return nil, fmt.Errorf("Node %s is not master, newly added node must be master.", nodeId)
		}
		if len(node.Ranges) != 0 {
			return nil, fmt.Errorf("Node %s is not empty, newly added node must be empty.", nodeId)
		}
		regionExist[node.Region] = true

		if node.Region == masterRegion {
			masterNodeId = nodeId
		}
	}

	// 检查地域覆盖
	for region, exist := range regionExist {
		if exist == false {
			return nil, fmt.Errorf("Lack node in region %s", region)
		}
	}

	// 设置主从关系
	for _, nodeId := range self.NodeIds {
		if nodeId == masterNodeId {
			continue
		}
		node := cs.FindNode(nodeId)
		_, err := redis.ClusterReplicate(node.Addr(), masterNodeId)
		if err != nil {
			return nil, fmt.Errorf("Set REPLICATE failed(%v), please set relationship manually.", err)
		}
	}
	return nil, nil
}
Exemplo n.º 2
0
				continue
			}
			resp, err := redis.DisableRead(n.Addr(), ns.Id())
			if err == nil {
				log.Infof(ns.Addr(), "Disable read of slave: %s %s", resp, ns.Id())
				break
			}
		}
	}

	MasterFailoverHandler = func(i interface{}) {
		ctx := i.(StateContext)
		cs := ctx.ClusterState
		ns := ctx.NodeState

		masterRegion := meta.MasterRegion()
		masterId, err := cs.MaxReploffSlibing(ns.Id(), masterRegion, true)
		if err != nil {
			log.Warningf(ns.Addr(), "No slave can be used for failover %s", ns.Id())
			// 放到另一个线程做,避免死锁
			go ns.AdvanceFSM(cs, CMD_FAILOVER_END_SIGNAL)
		} else {
			go cs.RunFailoverTask(ns.Id(), masterId)
		}
	}

	MasterGotoOfflineHandler = func(i interface{}) {
		ctx := i.(StateContext)
		cs := ctx.ClusterState
		ns := ctx.NodeState