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
}
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
}