コード例 #1
0
ファイル: inspector.go プロジェクト: ksarch-saas/cc
func (self *Inspector) isFreeNode(seed *topo.Node) (bool, *topo.Node) {
	resp, err := redis.ClusterNodesInRegion(seed.Addr(), self.LocalRegion)
	if err != nil && strings.HasPrefix(err.Error(), "ERR Wrong CLUSTER subcommand or number of arguments") {
		//server version do not support 'cluster nodes extra [region]'
		resp, err = redis.ClusterNodes(seed.Addr())
	}
	if err != nil {
		return false, nil
	}
	numNode := 0
	lines := strings.Split(resp, "\n")
	for _, line := range lines {
		line = strings.TrimSpace(line)
		if line == "" || strings.HasPrefix(line, "# ") {
			continue
		}
		numNode++
	}
	if numNode != 1 {
		return false, nil
	}
	for _, line := range lines {
		line = strings.TrimSpace(line)
		if line == "" || strings.HasPrefix(line, "# ") {
			continue
		}
		node, myself, err := self.buildNode(line)
		if node.Ip == "127.0.0.1" {
			node.Ip = seed.Ip
		}
		// 只看到自己,是主,且没有slots,才认为是FreeNode
		if !myself {
			return false, nil
		}
		if err != nil || len(node.Ranges) > 0 || !node.IsMaster() {
			return false, nil
		} else {
			return true, node
		}
	}
	return false, nil
}
コード例 #2
0
ファイル: inspector.go プロジェクト: ksarch-saas/cc
func (self *Inspector) checkClusterTopo(seed *topo.Node, cluster *topo.Cluster) error {
	resp, err := redis.ClusterNodesInRegion(seed.Addr(), self.LocalRegion)
	if err != nil && strings.HasPrefix(err.Error(), "ERR Wrong CLUSTER subcommand or number of arguments") {
		//server version do not support 'cluster nodes extra [region]'
		resp, err = redis.ClusterNodes(seed.Addr())
	}

	//this may lead to BuildClusterTopo update failed for a time
	//the node is step into this state after check IsAlive
	if err != nil && strings.HasPrefix(err.Error(), "LOADING") {
		return nil
	}
	if err != nil {
		return err
	}

	var summary topo.SummaryInfo
	lines := strings.Split(resp, "\n")
	for _, line := range lines {
		if strings.HasPrefix(line, "# ") {
			summary.ReadLine(line)
			continue
		}
		line = strings.TrimSpace(line)
		if line == "" {
			continue
		}

		s, myself, err := self.buildNode(line)
		if err == ErrNodeInHandShake || err == ErrNodeNoAddr {
			continue
		}
		// Fix 'cluster nodes extra' & 'cluster nodes extra region' compatiable
		if s.Region != self.LocalRegion {
			continue
		}
		if err != nil {
			return err
		}
		if s.Ip == "127.0.0.1" {
			s.Ip = seed.Ip
		}
		node := cluster.FindNode(s.Id)
		if node == nil {
			if s.PFail {
				glog.Warningf("forget dead node %s(%s) should be forgoten", s.Id, s.Addr())
				//redis.ClusterForget(seed.Addr(), s.Id)
			}
			return fmt.Errorf("node not exist %s(%s)", s.Id, s.Addr())
		}

		// 对比节点数据是否相同
		if !node.Compare(s) {
			glog.Infof("%#v vs %#v different", s, node)
			if s.Tag == "-" && node.Tag != "-" {
				// 可能存在处于不被Cluster接受的节点,节点可以看见Cluster,但Cluster看不到它。
				// 一种复现情况情况:某个节点已经死了,系统将其Forget,但是OP并未被摘除该节点,
				// 而是恢复了该节点。
				glog.Warningf("remeet node %s", seed.Addr())
				self.MeetNode(seed)
			}
			return ErrNodesInfoNotSame
		}
		if len(node.Ranges) == 0 && len(s.Ranges) > 0 {
			glog.Warningf("Ranges not equal, use nonempty ranges.")
			node.Ranges = s.Ranges
		}

		if myself {
			info, err := redis.FetchClusterInfo(node.Addr())
			if err != nil {
				return err
			}
			node.ClusterInfo = info
			node.SummaryInfo = summary
		}

		if len(s.Migrating) != 0 {
			node.Migrating = s.Migrating
		}
		if len(s.Importing) != 0 {
			node.Importing = s.Importing
		}

		if s.PFail {
			node.IncrPFailCount()
		}
	}
	return nil
}
コード例 #3
0
ファイル: inspector.go プロジェクト: ksarch-saas/cc
func (self *Inspector) initClusterTopo(seed *topo.Node) (*topo.Cluster, error) {
	resp, err := redis.ClusterNodesInRegion(seed.Addr(), self.LocalRegion)
	if err != nil && strings.HasPrefix(err.Error(), "ERR Wrong CLUSTER subcommand or number of arguments") {
		//server version do not support 'cluster nodes extra [region]'
		resp, err = redis.ClusterNodes(seed.Addr())
	}
	if err != nil {
		return nil, err
	}

	cluster := topo.NewCluster(self.LocalRegion)

	var summary topo.SummaryInfo
	var nodeidx *topo.Node
	var cnt int

	lines := strings.Split(resp, "\n")
	cnt = 0
	for _, line := range lines {
		if strings.HasPrefix(line, "# ") {
			summary.ReadLine(line)
			continue
		}
		line = strings.TrimSpace(line)
		if line == "" {
			continue
		}
		node, myself, err := self.buildNode(line)
		if err == ErrNodeInHandShake || err == ErrNodeNoAddr {
			continue
		}
		// Fix 'cluster nodes extra' & 'cluster nodes extra region' compatiable
		if node.Region != self.LocalRegion {
			continue
		}
		if err != nil {
			return nil, err
		}
		if node.Ip == "127.0.0.1" {
			node.Ip = seed.Ip
		}
		// 遇到myself,读取该节点的ClusterInfo
		if myself {
			info, err := redis.FetchClusterInfo(node.Addr())
			if err != nil {
				return nil, err
			}
			node.ClusterInfo = info
			node.SummaryInfo = summary
		}
		cluster.AddNode(node)
		nodeidx = node
		cnt++
	}
	if cnt == 1 {
		if nodeidx.IsMaster() && len(nodeidx.Ranges) == 0 {
			glog.Infof("Node %s is free node", nodeidx.Addr())
			nodeidx.SetFree(true)
		}
	}

	return cluster, nil
}