Example #1
0
func (cs *ClusterState) BuildClusterSnapshot() {
	// __CC__没什么意义,跟Region区别开即可
	cluster := topo.NewCluster("__CC__")
	for _, ns := range cs.nodeStates {
		cluster.AddNode(ns.node)
	}
	err := cluster.BuildReplicaSets()
	// 出现这种情况,很可能是启动时节点还不全
	if err != nil {
		log.Info("CLUSTER ", "Build cluster snapshot failed ", err)
		return
	}
	cs.cluster = cluster
}
Example #2
0
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
}